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Location: Russia; Perm; Moscow Workplace: remote ABOUT US Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. For more information, visit xsolla.com. THE ROLE We are hiring a Team Lead, Web3 to lead a cross-functional team of frontend, backend, smart contract and QA engineers in XsollaZK, Xsolla's Web3 ecosystem on a zkSync-based L2. Your team builds: smart wallets built on account abstraction; SDKs that game studios and partners use to bring players on-chain; infrastructure backend services for tokenizing in-game items and currencies; ecosystem dApps: a DEX, an NFT marketplace and an auction. This is a management role. Most of your time goes to people and delivery: building the team, growing engineers, and making delivery predictable. The rest goes to technical leadership: architecture, reviews and hands-on code where it matters. Responsibilities WHAT YOU WILL OWN The team: hiring, onboarding, growth and performance of frontend, backend, smart contract and QA engineers Delivery: predictable commitments, a sustainable pace and the quality of what the team ships How the team works: processes, engineering standards and an AI-assisted workflow Relationships with Product, DevOps and other Xsolla product teams: priorities, dependencies and expectations The technical direction of the team's product area: on-chain / off-chain architecture and key technical decisions, justified in writing Security and reliability of what the team ships: signing flows, contracts that hold user assets, production operation and the team's on-call rotation WHAT YOU WILL DO People Set clear goals and expectations for each engineer Run regular 1:1s, performance reviews and career development conversations; give direct feedback and address underperformance Hire engineers across disciplines: define roles, run interviews and onboard new people Grow engineers through mentoring and build the team's next leaders Build a culture of technical excellence, collaboration and continuous learning Delivery Work with Product to shape requirements, estimate and plan work Manage scope, workload, risks and dependencies so the team delivers on its commitments Report progress, risks and blockers to stakeholders Lead the team through production incidents and post-mortems Continuously improve development processes and team efficiency Technical leadership Review architecture and critical code across backend, frontend and smart contracts, with a focus on edge cases specific to Xsolla products: smart wallets, tokenization of in-game items and currencies, marketplace and auction flows Lead key decisions on smart wallet integration (UserOperations, paymaster and gas sponsorship), session keys and the signing flow Identify systemic risks (key management, signature phishing, bundler and RPC dependencies) and make sure they are addressed before they become incidents Contribute hands-on to critical features when needed Set up AI tooling in the repositories (Claude Code, Codex, Cursor: rules, context, harness) and drive its adoption across the team REQUIRED Management experience 5+ years of engineering management experience Managing cross-functional teams that combine several disciplines (for example frontend, backend, smart contracts and QA) Teams you led shipped dApps to production and maintained them People leadership Hiring and building teams: defining roles, running interviews, onboarding Performance management: setting goals, giving feedback, running performance reviews, handling underperformance Growing engineers: career plans, mentoring Delivery and stakeholders Delivery planning: estimation, sprint planning, managing scope, risks and dependencies Working with Product and other teams on priorities and trade-offs; explaining technical trade-offs to non-technical stakeholders Leading a team through production incidents and post-mortems Balancing management with hands-on technical work Technical depth A strong technical background: hands-on engineering experience across the Web3 stack, deep enough to lead technical decisions and review work on each layer: Web3 libraries and wallets: viem and wagmi in production; how wallet signers work (EOAs, browser and embedded wallets, smart accounts, EIP-191, EIP-712, EIP-1193); smart wallets (UserOperations, paymasters, ERC-1271) Backend: Go and TypeScript (Node.js); processing on-chain events (idempotency, reorgs, retries); asynchronous messaging (Kafka, RabbitMQ or NATS ); PostgreSQL and Redis; REST and gRPC API design Frontend: React and TypeScript; web security fundamentals ( XSS , CSRF , CSP , safe handling of signatures and keys in the browser) Smart contracts: reading Solidity and the EVM (storage, gas, proxy upgrade patterns, access control); common vulnerability classes (reentrancy, front-running / MEV , oracle manipulation, signature replay) Operations: Docker, Kubernetes, CI/CD; observability (we use Datadog; experience with Prometheus, Grafana, ELK / Graylog or OpenTelemetry also counts) AI-assisted engineering Daily hands-on use of AI coding tools (Claude Code, Codex, Cursor) for development and review, including configuring them for a repository English Spoken English at B2 level or higher Nice to Have ZK Stack and zk -rollups: EraVM vs EVM , system contracts (ContractDeployer, NonceHolder), L1↔L2 messaging, bridging and finality Smart contract development in Solidity with Foundry Deeper account abstraction: ERC-4337 EntryPoint versions and validation rules (ERC-7562, ERC-6492), modular accounts (ERC-7579 / ERC-6900), session keys and delegated permissions (ERC-7710 / ERC-7715), EIP-7702 Hands-on experience with wallet and AA infrastructure technologies (Sequence, thirdweb, Privy, Dynamic, Turnkey, Pimlico, Alchemy, ZeroDev, Safe{Core}), with clear views on build versus buy Key management: HSM , MPC / threshold signing, social or guardian-based recovery DeFi ( DEX , AMM ) and NFT marketplaces (ERC-721, ERC-1155, auctions) go-ethereum and abigen Managing distributed or remote teams Gaming or fintech experience with high-load systems HOW WE WORK Decisions in writing. Significant technical decisions are written up as an RFC or ADR that lays out the options and trade-offs. We discuss the document, not a blank whiteboard. AI is part of everyday engineering. We use AI coding tools for development and review, and we treat configuring them for a codebase as real engineering work. HOW WE HIRE Intro call. Your background, your motivation and the role. Technical interview. Built on the Technical depth part of the Required section and the technical items in What you will own . People and delivery. Built on the Management experience , People leadership and Delivery and stakeholders parts of Required : real situations from your experience with hiring, performance, delivery and incidents. Bar raiser. An engineer from outside the hiring team checks that you raise the overall engineering bar. BENEFITS We are passionate about fostering a supportive environment for our team, so we prioritize the physical, mental, and emotional well-being of our employees and their families through a comprehensive Benefits Program. This includes medical, dental, and vision, PTO, and a personalized career roadmap for each employee. By investing in professional development through training and educational opportunities, we ensure that our team thrives both personally and professionally. Together, we're not just building a business; we're cultivating a community that values creativity, collaboration, and the transformative power of play. EMPLOYMENT DETAILS Location: Remote  Employment Type: Full-time Schedule: 10:00–19:00 (flexible) Contract: Employment agreement (entity or EOR arranged per candidate location) EQUAL EMPLOYMENT STATEMENT Xsolla is dedicated to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, language, sexual orientation, national origin, genetics, political beliefs, disability, age, marital status, social background or other characteristics. We are committed to compliance with all fair employment practices regarding citizenship and immigration status. CONTACT If you have questions regarding our hiring practices, please contact careers@xsolla.com. For more vacancies, visit xsolla.com/careers.

Location: Paris Workplace: OnSite Company Description We’re http://checkout.comCheckout.com http://Checkout.com. You might not know our name, but companies like eBay, Spotify, Klarna, Uber, and Sony do, because we’re behind many of the digital experiences you use every day. We are where the world checks out, enabling over 10 billion transactions yearly for more than one billion global shoppers. Whether you want to book a holiday, order food, renew a subscription, or check out online, there’s a good chance our tech powers the payments behind the scenes. Our platform helps the most ambitious businesses deliver effortless digital experiences, at scale. If you want to do career-defining work, you’ve come to the right place. We move fast, think globally, and believe great teams are built by hiring exceptional people with conviction, curiosity, and the desire to make an impact. With 20 offices across six continents and London as our HQ, we’re shaping the future of fintech – and we’re just getting started. Checkout.com http://Checkout.com is actively looking for an enthusiastic and talented Payments Sales Manager to join our Commercial Payments Team to drive rapid growth across various industries for our revolutionary online payment solution. If you are a driven and focused salesperson with a proven track record of success selling direct payment solutions to enterprise companies, in a high-growth and competitive environment, this is the role for you. In return, on top of a tremendous working environment, we offer you an unrivaled uncapped recurring commissions plan, hybrid work model and competitive benefits package. The Sales Manager will play a key role in growing Checkout.com http://Checkout.com’s payments footprint. They will be responsible for selling Checkout.com http://Checkout.com’s full payments technology stack to middle market and large enterprise organizations. Along the way, you'll collaborate closely with various in-house talents across Technology and Business to position our capabilities, products, services and solutions effectively with prospects. Desire an independent, high-achieving individual that stands out in an entrepreneurial environment and has the grit and desire to outperform sales targets.   How you’ll make impact: ● Acting as a consultative Payments strategist able to advise companies on an optimal payments structure that pulls from a myriad of solutions Checkout.com http://Checkout.com provides ● Identify, qualify and close the most promising prospects and partners that will help Checkout.com http://Checkout.com grow a healthy pipeline across various verticals. ● Build prospect engagement strategies and partner with marketing, business development, product and other departments to build qualified that pipeline in cold and warm channels ● Pitch our next-generation payment solutions and value-added services ● Prepare high-quality presentations and proposals for C-suite stakeholders at prospective merchants, and implement winning negotiation strategies ● Become the expert on Checkout.com http://Checkout.com’s technology stack, help new merchants understand the value of Checkout.com http://Checkout.com to solve their pain points, and handle detailed questions about our product capabilities. ● Orchestrate the entire Sales process, drive urgency and work to mutual action plans, and act as the main point of contact for merchants and internal stakeholders. ● Maintain a solid, well-organized portfolio and nurture key accounts by having a deep understanding of their industry, pain points, and needs. ● Partner with other Payment Sales Managers to share best practices, key business insights and industry trends. ● Provide feedback on local trends including competitor insights, customer needs, sales, product and marketing information.   Qualifications: ● 3+ years Enterprise Sales experience ideally in the Payments industry ● Track record of high performance, and self sourcing leads ● Highly motivated and committed to growth and development with excellent communication skills ● Solid network of potential prospects and partners within the payments landscape ● Tech-savvy, with a passion for Fintech and Payments ● Strong commercial acumen, ability to effectively negotiate complex structures ● Fluent in English + French Additional Information Bring all of you to work We create the conditions for high performers to thrive, through real ownership, fewer blockers, and work that makes a difference from day one. Here, you’ll move fast, take on meaningful challenges, and be recognized for the impact you deliver. It’s a place where ambition gets met with opportunity, and where your growth is in your hands. We work as one team, and we back each other to succeed. So whatever your background or identity, if you’re ready to grow and make a difference, you’ll be right at home here. It’s important we set you up for success and make our process as accessible as possible. So let us know in your application, or tell your recruiter directly, if you need anything to make your experience or working environment more comfortable. Life at Checkout.com http://Checkout.com We understand that work is just one part of your life. Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection. Curious about what it’s like to be part of our team? Visit our Careers Page https://www.checkout.com/careers to learn more about our culture, open roles, and what drives us. For a closer look at daily life at Checkout.com http://Checkout.com, follow us on LinkedIn https://www.linkedin.com/company/checkout/life/ and Instagram https://www.instagram.com/checkout_com/

Location: Chisinau, Moldova, Republic of Workplace: remote Yopeso has been developing a diverse range of software products, from large-scale applications to smaller solutions, for 20 years. With a growing team of over 300 employees across five locations, we are dedicated to fostering a culture of growth, transparency, and professionalism. At Yopeso, we value authenticity, curiosity, and ambition. These values drive us to build strong connections within our community and with our partners, ensuring trust, integrity, and transparency in all our business practices. We strive to maintain the highest professional standards and continuously challenge ourselves to develop high-quality, high-performance, and secure software solutions. Our approach is rooted in efficient collaboration among passionate professionals working in agile teams. Guided by curiosity and ambition, we strive to create products that are meaningful and impactful, while remaining true to our authentic selves. What we offer: Competitive remuneration Remote work Sports/leisure benefit 20 sick leave days paid at 100% 32 calendar days of vacation Team events, online, at the office, or outside Professional development plan with guidance and mentorship Training and development opportunities with an allocated budget Professional Certifications Optional medical insurance About the Project We are looking for a Reliability / DevOps Engineer to join the team, supporting a financial database platform built around business-critical database systems and related operational processes. The role focuses on maintaining the stability, availability, performance, and reliability of large-scale databases , including environments containing terabytes of data . You will work with database infrastructure, monitoring, upgrades, migrations, automation, and incident prevention in a highly reliability-focused environment. Key Responsibilities Monitor and maintain the reliability and availability of business-critical database systems. Support databases containing terabytes of data and ensure stable operation in production environments. Perform and support database version upgrades, patching, and maintenance activities . Plan and execute data migrations with a strong focus on availability, integrity, and risk mitigation. Investigate production issues, performance degradation, and reliability incidents. Implement and improve monitoring, alerting, and observability for databases and supporting infrastructure. Automate operational and infrastructure processes where appropriate. Work with infrastructure and database teams to improve resilience, scalability, and operational efficiency. Participate in root cause analysis and contribute to preventive measures following incidents. Maintain and improve operational procedures, runbooks, and reliability practices. Required Skills Hands-on experience in DevOps, Site Reliability Engineering, Infrastructure Engineering, or Database Operations . Good understanding of database management and database reliability concepts . Experience supporting large or business-critical production systems. Practical experience with monitoring and observability tools . Understanding of performance monitoring, alerting, troubleshooting, and incident management. Experience working with data migrations and/or database upgrades . Good knowledge of Linux and infrastructure troubleshooting. Ability to work independently and take ownership of production reliability topics. Nice to Have Experience with AWS . Experience with Terraform or other Infrastructure-as-Code tools. Experience with enterprise monitoring and observability platforms. Previous experience working with Oracle Databases . Experience managing databases at terabyte scale . Background in Database Reliability Engineering (DBRE) or SRE environments. Experience supporting systems in the financial services or other highly regulated industries .

Key responsibilities: 1. Building and maintaining relationships with clients 2.

Location: Bucuresti, Romania; Cluj-Napoca, Romania; Iasi, Romania Workplace: remote Yopeso has been developing a diverse range of software products, from large-scale applications to smaller solutions, for 19 years. With a growing team of over 250 employees across five locations, we are dedicated to fostering a culture of growth, transparency, and professionalism. At Yopeso, we value authenticity, curiosity, and ambition. These values drive us to build strong connections within our community and with our partners, ensuring trust, integrity, and transparency in all our business practices. We strive to maintain the highest professional standards and continuously challenge ourselves to develop high-quality, high-performance, and secure software solutions. Our approach is rooted in efficient collaboration among passionate professionals working in agile teams. Guided by curiosity and ambition, we strive to create meaningful, impactful products while staying true to our authentic selves. What we offer: Competitive remuneration Remote work 24 days off per year and floating days Private clinic health services, Regina Maria Medical Insurance Flexible benefits through Up multi-benefits platform Referral bonus scheme Team events, online or at the office Training and development opportunities with allocated budget Professional Certifications Knowledge-sharing context About the Project We are looking for a Reliability / DevOps Engineer to join the team, supporting a financial database platform built around business-critical database systems and related operational processes. The role focuses on maintaining the stability, availability, performance, and reliability of large-scale databases , including environments containing terabytes of data . You will work with database infrastructure, monitoring, upgrades, migrations, automation, and incident prevention in a highly reliability-focused environment. Key Responsibilities Monitor and maintain the reliability and availability of business-critical database systems. Support databases containing terabytes of data and ensure stable operation in production environments. Perform and support database version upgrades, patching, and maintenance activities . Plan and execute data migrations with a strong focus on availability, integrity, and risk mitigation. Investigate production issues, performance degradation, and reliability incidents. Implement and improve monitoring, alerting, and observability for databases and supporting infrastructure. Automate operational and infrastructure processes where appropriate. Work with infrastructure and database teams to improve resilience, scalability, and operational efficiency. Participate in root cause analysis and contribute to preventive measures following incidents. Maintain and improve operational procedures, runbooks, and reliability practices. Required Skills Hands-on experience in DevOps, Site Reliability Engineering, Infrastructure Engineering, or Database Operations . Good understanding of database management and database reliability concepts . Experience supporting large or business-critical production systems. Practical experience with monitoring and observability tools . Understanding of performance monitoring, alerting, troubleshooting, and incident management. Experience working with data migrations and/or database upgrades . Good knowledge of Linux and infrastructure troubleshooting. Ability to work independently and take ownership of production reliability topics. Nice to Have Experience with AWS . Experience with Terraform or other Infrastructure-as-Code tools. Experience with enterprise monitoring and observability platforms. Previous experience working with Oracle Databases . Experience managing databases at terabyte scale . Background in Database Reliability Engineering (DBRE) or SRE environments. Experience supporting systems in the financial services or other highly regulated industries .

Location: Constanta, Romania Workplace: on-site ✨ About the Role ︁︎️️︊︁️︀​︂︆︄︄​︁︁︎︌​︈︂︇︍​︈︆︅️︊︄︈︌︊︎︂︎ We’re looking for a results-driven, people-focused Commercial Team Leader to manage our acquisition team, drive performance, and shape commercial strategy. If you love leading people, turning goals into results, and working in a fast-paced, international environment — this is your next big step. 🎯 Who You Are ✔ You have leadership experience (min. 6 months) and a passion for helping people grow. ✔ You’re people-oriented and know how to inspire, coach, and empower your team. ✔ You’re results-focused and motivated by impact and measurable outcomes. ✔ You’re hands-on, working side-by-side with your team every day. ✔ You communicate confidently in English (B2+) and Spanish (at least B1) and thrive in a multicultural setting. ✔ You hold a bachelor’s degree (or equivalent). 💼 What You’ll Do Lead and support a team of 5–7 of prospectors. Oversee daily operations and ensure commercial objectives are met. Track KPIs, analyze results, and propose action plans. Recruit, train, coach, and motivate your team toward performance. 🎁 What We Offer 💰 Competitive salary + monthly performance bonuses 📅 Work schedule business from Monday to Friday, office base in Constanta 📚 4-month training & coaching program focused on leadership, KPI tracking, and reporting 📈 Clear career growth path in a dynamic international business ✈ Frequent international travel to partner offices, trade fairs, and strategic business events 🌍 Collaboration with colleagues across 9 countries and exposure to global markets 📦Flexible benefits package – flexible perks, private health insurance, gym membership, meal vouchers, and more 🧠 Continuous development programs, language courses, and leadership training initiatives 📩 Apply now and take your leadership career to a global stage — where ambition meets real growth and your impact drives results. 🌍 About VEO VEO Worldwide Services is an international clearance company with over 19 years of experience, part of the NOZ Group, the European leader in destocking with over €1 billion turnover. We are more than 1,000 colleagues across 9 countries, working with partners in 35 global markets (Europe & North Africa) 📦 Our mission: We help companies turn surplus stock into new opportunities, building a more sustainable global economy — while creating meaningful careers that grow with real impact. -

• Разработка и развитие модулей toolchain на Python: mors-linter, mors-builder, mors-deployer (CLI на Typer, packaging через uv/Hatchling). • Доработка и реализация интегрированного сценария на FastAPI: Web API (M-API), модули Repository, Transport, Deployment Orchestrator, Load, Administration;

Location: Russia; Moscow; Perm Workplace: remote About Xsolla Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. For more information, visit xsolla.com. About the Role We are hiring a Staff Software Engineer to own the smart wallet and account abstraction layer of XsollaZK, Xsolla's Web3 platform on a zkSync-based L2. This is an individual contributor role with a large technical scope. You are the technical anchor for how millions of players get an on-chain account they never have to think about. The product. Every player who signs in with Xsolla ID receives a deterministic, non-custodial smart account. The account is derived from their identity claim, is identical on every device, and its private keys never leave the client. It is not a separate wallet screen: it is the player's inventory. It backs: minting and gifting; trading on our Bazaar marketplace; Merkle-based reward airdrops; gas sponsorship; an in-app dApp browser that exposes the same signer to third-party applications through an EIP-1193 provider. Responsibilities The technical strategy and architecture of the smart wallet platform: account model, signing, session management and gas abstraction at scale The smart account and permissioning model, evolved to meet both product and compliance needs The security model where our signer meets third-party applications: what a player is actually approving, and proof that the UI shows it The custody and recovery roadmap, from today's interim mechanisms (including raw key export) to MPC -based custody Cross-team technical decisions on account architecture, SDK contracts, data modeling and platform reliability, with buy-in from the wallet, marketplace, SDK, mobile and security teams Engineering standards in the Web3 domain Production escalations in the wallet and account abstraction domain WHAT YOU WILL DO Design and evolve the ERC -4337 user operation lifecycle (prepare → sign → submit → confirm), EIP -7702 delegation, deterministic address derivation from identity, and the session-key and permission primitives (including origin-bound Smart Sessions) that let players act without a prompt on every transaction Set the paymaster and gas-sponsorship strategy: what we sponsor, how we meter and cap it, how we defend it from abuse, and how it degrades when sponsorship is unavailable Define EIP -1193 / EIP -6963 provider behavior, origin-bound and policy-versioned sessions, trust tiers, and the transaction and signature confirmation flow Design recovery paths (passkeys, guardians, social recovery) that a non-crypto-native player can complete without losing assets Identify systemic risks (key management, signature phishing, reorgs and indexer staleness, bundler and RPC dependencies, contract upgrade paths) and lead initiatives that resolve them before they become incidents Write RFCs and design docs; review critical code, contracts and designs Work with product, security, legal and infra teams to align on the roadmap and turn business and regulatory needs into well-scoped technical plans Create leverage for the engineering org through documentation, tooling and mentorship Serve as the escalation point for complex production issues: a stuck user operation, a drained paymaster, a signing prompt a player didn't understand Set up and maintain AI tooling in the repositories (Claude Code, Codex, Cursor: rules, context, harness) so the team uses it effectively REQUIRED Experience 8+ years of engineering in the Ethereum ecosystem working with crypto wallets and smart wallets Designing or operating a production smart wallet or account abstraction system serving real users and real value Shipping and operating systems where a bug meant lost funds. You can talk concretely about the guardrails, reviews and rollback paths you put in place Account abstraction and smart wallets ERC -4337 in depth: EntryPoint (v0.6 through v0.8), the UserOperation lifecycle, bundler and paymaster roles, validation rules ( ERC -7562), gas estimation and its failure modes, counterfactual deployment, signature validation for undeployed accounts ( ERC -6492) EIP -7702 and the post-Pectra landscape: EOA delegation, its interaction with EntryPoint v0.8, and the risks it introduces (residual key authority, delegation phishing, storage collisions) Building on or extending production smart account implementations; modular account standards ( ERC -7579 / ERC -6900) Session keys and delegated permissions: scoped, time-limited, policy-bound authority; TTLs and contract allowlists, origin binding, permission revocation; ERC -7710 / ERC -7715 Signature schemes and wallet interfaces: EIP -712 typed data, ERC -1271 contract signatures, WebAuthn / passkey (P-256) signers; EIP -1193, EIP -6963, EIP -5792 batched calls, ERC -7677 paymaster interfaces Smart contracts and EVM Solidity and the EVM : reading, reviewing and writing account, paymaster and module contracts; gas-aware design; upgradeability and migration patterns; working effectively with external auditors L2 specifics and their effect on wallet design: native account abstraction on zkSync-family chains, transaction and fee models, finality and reorg behavior, RPC and indexer semantics Backend Go: idiomatic code, concurrency patterns, performance profiling TypeScript and SDK design: client-side SDK surfaces that internal and external teams build on Distributed systems and their trade-offs (consistency, availability, failure modes); reconciling off-chain state against an authoritative on-chain result Data and infrastructure PostgreSQL: schema design, query optimization, migrations at scale Kubernetes: deploying, operating and debugging services Asynchronous messaging and event-driven design (Kafka or NATS ): consumer groups, at-least-once delivery Git, CI/CD Security Key management in production: platform secure storage (Keychain / Keystore), HSMs, MPC or threshold signing, and the operational discipline around each Wallet threat modeling: signature and delegation phishing, malicious dApp origins, replay and cross-chain replay, token approval abuse, paymaster griefing and DoS Leadership Leading multi-quarter technical initiatives across teams Influencing architecture and standards beyond your immediate team RFCs and design docs that stand on their own and are actionable without you in the room AI-assisted engineering Daily hands-on use of AI coding tools (Claude Code, Codex, Cursor) for development and review, including configuring them for a repository English English at C1 level Nice to Have Hands-on experience with ZK Stack and zk -rollups Hands-on experience with embedded and ecosystem wallet and AA infrastructure technologies (thirdweb, Privy, Dynamic, Turnkey, Pimlico, Alchemy, Biconomy, ZeroDev, Safe{Core}), with clear views on build versus buy MPC / threshold custody, social recovery or guardian-based recovery in a consumer product NFT and token infrastructure at scale: ERC -721 / ERC -1155 / ERC -20 mechanics, marketplace contracts, Merkle-based airdrop and claim distribution, chain indexing services Contributions to open-source wallet, security or identity projects, including authoring or reviewing ERC / EIP standards Compliance requirements for crypto consumer products: KYC / AML , geofencing, MiCA , SOC 2, ISO 27001, GDPR data minimization, audit logging Identity and auth integration for wallet derivation: OAuth 2.0 / OIDC , JWT verification, token scoping Platform or infrastructure engineering: building systems other engineers build on Owning a mobile wallet surface: React Native / Expo, WebView provider injection, native signing UI Gaming industry experience: platforms for game developers, publishers or players How We Work Decisions in writing. Significant technical decisions are written up as an RFC or ADR that lays out the options and trade-offs. We work across time zones, so a design has to stand on its own. AI is part of everyday engineering. We use AI coding tools for development and review, and we treat configuring them for a codebase as real engineering work. HOW WE HIRE Intro call. Your background, your motivation and the role. Technical interview. Built directly on the What you will own and Required sections above. We won't ask about anything this posting doesn't promise. System design. You design part of a wallet or account abstraction platform end to end and walk us through the trade-offs. Bar raiser. An engineer from outside the hiring team checks that you raise the overall engineering bar. Benefits We are passionate about fostering a supportive environment for our team, so we prioritize the physical, mental, and emotional well-being of our employees and their families through a comprehensive Benefits Program. This includes medical, dental, and vision, PTO, and a personalized career roadmap for each employee. By investing in professional development through training and educational opportunities, we ensure that our team thrives both personally and professionally. Together, we're not just building a business; we're cultivating a community that values creativity, collaboration, and the transformative power of play. EMPLOYMENT DETAILS Location: Remote  Employment Type: Full-time Schedule: 10:00–19:00 (flexible)

Location: Tokyo Workplace: Remote WHO ARE WE? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! Why this role? In this role, you will have ownership of the full sales cycle - from identifying leads to closing deals for enterprises across diverse industries in Japan such as financial services, manufacturing, healthcare, energy, telecommunications and oil and gas. Cohere seeks an approachable and compelling communicator who loves working with prospects to uncover their needs and feels comfortable developing tailored value propositions around how Cohere’s platform can help them achieve their business goals. You’ll lay the foundation for Cohere’s growth by owning your territory and collaborating with teammates across Customer Success, Sales Development, Marketing and Sales Engineering. You’ll be the voice of the field and partner with our Product and Engineering teams to prioritize the Cohere roadmap with customer-centric care. In this highly self-directed role, you are someone who thrives in an unstructured and quickly evolving environment. And your opportunity for impact will be astronomical — Cohere has skies-the-limit potential, and you’ll help us reach it. As an Account Executive, you will: - Focus on net-new logo acquisition via outbound business development activity and relationship building with key stakeholders - Work closely with customers and prospects as a trusted advisor who deeply understands their challenges and goals, and will tailor solutions to drive impact for their businesses - Work in close partnership with channel partners to find opportunities to scale outreach and customer satisfaction in your region - Collaborate with Product and Engineering teams on strategic motions to deliver solutions to large enterprise customers - Collaborate with Sales Development Representatives to drive top of funnel activity - Own the full sales cycle – from initial outreach through proof-of-concept to deal close You may be a good fit if you have: - 10+ years of enterprise level B2B sales experience, negotiating and closing large enterprise deals, and a track record of high performance and overachieving your quota - Experience selling technical products, such as developer tools, API products, or AI / NLP solutions, are a plus - A track record of working with channel partners to drive sales cycles and hit shared revenue goals - High tolerance for ambiguity - as an early sales team hire, you’ll have to be a doer and a strategist - Curiosity - you want to go deep on Agentic AI and NLP and become an expert on our technology - Fantastic communication skills - you are a great listener, have a knack for understanding what matters most to others, build strong relationships, can speak to the C-suite, and feel comfortable speaking to both technical and non-technical audiences - Native-level Japanese and business-level English FULL-TIME EMPLOYEES AT COHERE ENJOY THESE PERKS: - A weekly lunch stipend of $75/£75 or equivalent in your local currency for lunch. - Full health and dental benefits, including a separate budget for mental health. - RRSP matching, 401K, Pension Scheme. - 100% Parental Leave top-up for up to 6 months, for either parent. - Annual enrichment benefits: Arts & culture, fitness/wellness, quality time, and a workspace improvement credit. Education & learning stipend for conferences, courses, and coaching. - 6 weeks of paid vacation (30 working days!) - Budget for traveling to other offices if you are remote, plus an annual company offsite. HOW AND WHERE WE WORK: - Cohere is remote-friendly, but we also have offices in Toronto, London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul with more opening soon. - For those in the office: a daily lunch program, plenty of snacks, and regular community and social events. - For those not near an office: a co-working benefit so you can work alongside others in your city. - Everyone receives a $500 home office stipend to set up your workspace properly. If any of the above doesn’t line up exactly with your experience, we still encourage you to apply. We strive to create an inclusive work environment for all; we welcome applicants from all backgrounds and are committed to providing equal opportunities. Should you require any accommodations during the recruitment process, please submit an Accommodations Request Form https://docs.google.com/forms/d/12a6IrLdF3kI2nonKSr4tiFuz18rLQbaeYV-JM9L4o9Q/edit, and we will work together to meet your needs. We may use AI-enabled tools to screen and assess applicants against the criteria for this position. This helps our recruiters identify potentially qualified candidates, but it doesn't limit the applications our recruiters may review or consider. Beware of Scams: Cohere will never ask for payment or third-party services (e.g., CV writing) as part of our hiring process. All legitimate roles are listed on the Cohere careers page and LinkedIn only, with all communications from Cohere employees coming from an @cohere.com or @cw.cohere email alias. If jobs are viewed on other sites then please verify these through our official careers https://cohere.com/careers page.

Location: Cebu City, Philippines Workplace: remote At TechBiz Global, we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a U.S. B2B Sales Representative to join one of our clients ' teams. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you. Responsibilities: Proactively prospect and cold call U.S.-based businesses to generate new B2B sales opportunities. Identify and qualify potential customers through outbound calling, email outreach, and follow-ups. Conduct discovery calls to understand prospects’ business needs, challenges, and buying requirements. Present and demonstrate the company’s AI-driven solutions, clearly communicating business value and relevant use cases. Own the sales process from initial cold outreach through closing , rather than only booking appointments for another salesperson. Handle objections related to pricing, timing, competition, product fit, and other concerns during the sales process. Build relationships with decision-makers and key stakeholders within U.S. businesses. Prepare and present commercial proposals tailored to prospective clients. Negotiate pricing, terms, and agreements and work toward converting qualified prospects into paying customers. Maintain consistent follow-up with prospects throughout the sales cycle. Manage and maintain an accurate sales pipeline in the CRM, including activities, opportunities, next steps, and deal stages. Meet or exceed individual sales, revenue, and conversion targets. Provide regular pipeline updates, sales forecasts, and performance reports to leadership. Collaborate with Marketing, Product, and Customer Success teams and share market and prospect feedback. Demonstrated experience in B2B sales, preferably in technology, software, or AI-driven solutions. Strong skills in lead generation, prospecting, and pipeline management using CRM tools. Ability to conduct consultative sales conversations, understand client business challenges, and propose appropriate solutions. Effective negotiation, presentation, and communication skills with stakeholders at multiple organizational levels. Comfort working with United States business clients and understanding of U.S. business practices and etiquette. Ability to collaborate with cross-functional teams, including marketing, product, and customer success. Solid analytical and problem-solving abilities, with capacity to interpret data and sales metrics. Fluency in English; additional language skills are a plus. Self-motivated, organized, and able to manage priorities in a fast-paced environment. Bachelor’s degree in Business, Marketing, Communications, or a related field, or equivalent practical experience.

– Сбор и согласование требований при миграции с Битрикс24 на Jira Data Center; – Актуализация процессов AS IS / TO BE и целевых шаблонов;

Location: Москва Мы создаем и развиваем корпоративный движок потоковой обработки данных на основе Apache Flink, который используется разработчиками банка для построения приложений реального времени: фрод-мониторинг, скоринг, обогащение транзакций, расчеты. Вы будете работать в платформенной команде, которая отвечает за фреймворк и платформенные возможности Flink. Платформа находится в фазе активного развития: в рамках стратегического проекта мы снижаем сквозную задержку поставки данных с часов до секунд, развиваем stateful-обработку на внешних state backends, строим self-service управление жизненным циклом приложений и готовим платформу к сценариям реального времени для AI-агентов. Аналитик в этой команде — ключевая роль на стыке архитектуры, разработки и потребителей: от качества проработки требований напрямую зависит скорость и надежность развития платформы. Обязанности ### Обязанности * анализ, проработка ТЗ и приемка реализации механизмов stateful-обработки с использованием внешних state backends (S3-совместимое объектное хранилище, HBase, перспективно — Fluss) для сценариев соединения с большими справочниками и хранения состояния приложений * проектирование решений для повышения отказоустойчивости и управляемости приложений: savepoints, автоскейлинг, восстановление после сбоев * разработка требований к интеграции Flink-приложений с корпоративными системами: аутентификация, секрет-менеджеры, логирование (ELK), метрики (Prometheus/Grafana) * проработка требований к системе мониторинга состояния Flink-кластеров и джобов: метрики JVM, backpressure, checkpoint durations, lag * анализ и проектирование процесса управления жизненным циклом приложений (деплой, апгрейд, остановка) через корпоративный портал управления сервисами * проектирование интеграции Flink JobManager / REST API с порталом управления * выявление и формализация потребностей внутренних команд-разработчиков * Создание подробной технической документации, чек-листов и best practices для команд-потребителей * Тестирование реализованных функций: разработка тест-планов и сценариев (включая негативные и нагрузочные), проведение приемо-сдаточных испытаний. Требования ### Требования * опыт работы системным или бизнес-аналитиком от 4 лет, из них не менее 2 лет в области потоковой обработки данных или Big Data * опыт проектирования и описания интеграций через REST API * знание принципов работы систем мониторинга (Prometheus, Grafana), умение читать и интерпретировать метрики * продвинутый уровень SQL, умение работать с технической документацией (RFC, официальная документация) * навыки декомпозиции сложных задач и построения процессов; отличные коммуникационные навыки для работы с техническими командами (разработчики, DevOps) и потребителями (data-инженеры) * умение четко и структурно документировать требования в виде ТЗ / User Stories с критериями приемки. ### Будет плюсом * глубокое понимание архитектуры Apache Flink: концепции операторов, state, checkpointing, savepoints, exactly-once семантика, роль JobManager/TaskManager * практический опыт проектирования или эксплуатации Flink-приложений; понимание проблематики хранения и восстановления состояния * знание экосистемы Hadoop / Big Data: HDFS, HBase, Kafka; понимание принципов работы с объектными хранилищами (S3) * опыт работы с Kubernetes: понимание основных концептов (Pods, Deployments, Services, ConfigMaps) * навыки работы с генеративными AI-моделями. Условия ### Мы предлагаем * комфортный современный офис в Москве: БЦ Даниловский форт, рядом с М.Тульская, Верхние котлы * возможность выбрать удобный график – офис/гибрид * ежегодный пересмотр зарплаты, годовая премия * корпоративный спортзал и зоны отдыха * более 400 образовательных программ СберУниверситета для профессионального и карьерного развития * расширенный ДМС, льготное страхование для семьи и корпоративная пенсионная программа * гибкий дисконт по ипотечному кредиту, равный 1/3 ключевой ставки ЦБ * подписка Прайм с возможностью совместного использования на трёх близких * вознаграждение за рекомендацию друзей в команду Сбера.

Location: Limassol Cyprus Workplace: OnSite ABOUT US Scorewarrior is a game developer and publisher based in Limassol, Cyprus. We are working on Total Battle — a cross-platform MMO 4X strategy game with a deep social system and extensive player interaction. We have 2 million monthly active players and continue to grow with the goal of becoming the #1 game in the genre. Our team consists of 200+ passionate, talented, self-driven, and continually developing professionals who love making high-quality games. ABOUT THE POSITION We are looking for a Senior Product Analyst to join our General Analytics team: the analytics lead, an analytics engineer and you. Product teams have their own analysts; we take the research questions they cannot answer on their own, and we own how analytics is done across the company. The core of the role is research: high-uncertainty product questions where the answer is the estimated effect of a specific factor, not a dashboard. Whether to extend the game's lifecycle, how to tell that a new giant feature works, how to run experiments on veteran players spread across hundreds of kingdoms. Alongside it you own the methodology: how experiments and effect estimates are done at Scorewarrior, and whether a number is good enough for a decision and useful to other analysts afterwards. It is a senior individual-contributor role: close work with the analytics lead, short cycles with game designers and product managers. Pilots of the infra components (experimentation platform, visualization system, AI analyst assistant, ELT) are driven by the analytics lead and the infrastructure itself by the data tech lead; you join as the customer, not the builder. Game industry experience is not required. WHAT YOU WILL BE DOING - Take high-uncertainty questions from product teams (Old Players, New Players, Quality of Life, Platform) from a vague question to a decision the team acts on. - Design and analyze experiments in non-standard setups: delayed treatment for veteran players, kingdom-level (cluster) tests, small samples, heavy-tailed revenue. Own variance reduction, outlier handling, permutation tests, MDE and power, reporting rules. - Estimate effects where a classic A/B test is impossible, using causal inference and quasi-experimental designs, and turn one-off solutions into methods other analysts reuse: reference documents, dbt data marts, Tableau dashboards. - Be the last check before the business acts on a number: the assumptions behind a metric, a test read-out or a pilot's output. - Use Python inside research when SQL is not enough: a graph algorithm over clan and kingdom networks, an optimization problem, a simulation. - Specify logging for features shipped by teams without their own analyst, and cover their ad-hoc questions. REQUIRED QUALIFICATIONS - Experience running research with high uncertainty end-to-end, from problem framing to a decision the team acted on. - Hands-on causal inference and quasi-experimental methods (difference-in-differences, synthetic control, matching or similar) on product questions: you can say what breaks an estimate and how you checked it. - Hands-on A/B test design and analysis, and the applied statistics behind it: distributions, power and MDE, variance reduction, heavy tails and outliers. - Strong SQL on an analytical data warehouse; ClickHouse is a plus. - Working Python for research: you can implement an algorithm or a statistical procedure that has no ready-made library call, and you understand what your code, or your AI assistant's code, does and whether it can work. No production services expected. - Clear, concise communication in writing and in person: you fix agreements, and you say so when a result cannot be trusted, including to the people who asked for it. - English at B1 or above. PREFERRED QUALIFICATIONS - Data science background alongside analytics: modeling, segmentation, validating assumptions with statistical tests. - Experience building or improving an experimentation platform, or setting methodology that other analysts followed. - Hands-on experience with dbt and Tableau. - Understanding of F2P economics, network effects, social or competitive systems; you play games and are ready to play Total Battle. WHAT WE OFFER - A team of professionals with a passion for gamedev and a drive to make Total Battle the #1 MMO 4X strategy game. - An excellent remuneration package, including a 13th salary. - Full relocation coverage for you and your family to Cyprus (Limassol). - A modern, sunny office close to the sea. - Private health insurance for you and your family members. - A monthly pre-school, school, and university allowance for employees' children. - Lunch compensation. - A sports and fitness allowance. - Company-funded personal development opportunities (professional and language courses, books, etc.). - Bonuses for outstanding results, years of service, marriage, and childbirth. - Friendly monthly office parties and epic annual offsite company birthday and Christmas celebrations.

Location: Warsaw, Poland Blue Projects is looking for a skilled Electrical Design Engineer, with strong electrical background, and experienced in using 3D programs as Revit and AutoCAD. Eagerness to learn and expand its knowledge is also a key point. Requirements: • Bachelor’s degree in electrical engineering or equivalent •             Minimum 5 years’ experience in electrical systems design •             Good English speaking and writing skills is mandatory •             Modelling skills for main electrical plant, electrical panels cabling and detailing •             Experience with multidisciplinary coordination •             Proficient in the use of 2D and 3D CAD systems such as Revit and AutoCAD •             Solid understanding of electrical systems •             Solid knowledge of the Romanian and European norms and regulations •             Solid knowledge in existing electrical systems and equipment •             Able to propose new and innovative solutions •             Able to conduct meetings with clients and respond to client’s demands in due time and with comprehensive solutions •             Extra low voltage design diploma is mandatory •             PV panels design or multiline diagram schematic design is a plus •             Strong working knowledge of Microsoft Office and applicable programs •             Solid organizational skills including attention to detail and multi-tasking skills •             Excellent written and verbal communication skills •             Background in designing low voltage and extra low voltage systems for industrial and logistics buildings is mandatory. Responsibilities •             Create systems according to client’s demand and expectations. Propose efficient solutions both in terms of cost and consumption •             Review the project specifications to define requirements. •             Meet with the client or other consultants to gain a clearer understanding of what type of design is needed. •             Determine the basic design for the electrical system. The designer is required to use either a CAD modeling software (Revit) or a 2D design software (AutoCAD) to create a 3D model representation of the system or 2D drawings and incorporate any equipment related to the electrical systems, including all connections and control units. •             Create single-line diagrams using EcoStruxure Power Design •             Coordinate the medium voltage and BMS designer where is necessary •             Create, verify and validate all Material Approval Forms •             Answer any questions or solve any problems that come up during conception, design and installation that are related to his design. •             Coordinate with the rest of the design team (Architectural, Structural and Mechanical) •             Prepare reports, equipment schedules, specifications, etc. •             Prepare schematics, layouts and details according to design requirements. About Blue Projects Blue Projects is a unique multidisciplinary and engineering company with high experience in all industry sectors. Our core services include Project Management, Construction Management, Design & Engineering, Commercial Management and Health & Safety Management. At Blue Projects, we believe that growing a great project management company happens from the inside out. It begins with people who are drawn to work that uses every talent they possess, plus imagination, determination and a drive to do the extraordinary.

-Проектирование архитектуры с нуля: масштабируемый сетевой компонент на Go, интеграция с SDN, compute и API. -Выбор технологий, построение PoC, декомпозиция задач, проведение code review, контроль качества.

Location: Warsaw, Mazowieckie, Poland; Sofia City, Bulgaria; Limassol, Cyprus Workplace: hybrid Capital.com's Product Security team protects our web and mobile applications, infrastructure, and external perimeter in a highly regulated environment. As Senior/Staff Application Security Engineer, you will raise the bar for application security across the organisation. This role is measured by leverage: how well you design, automate, and scale security processes so that many engineering teams can build securely by default. You will lead security architecture reviews and threat modelling, increasingly with the help of AI tooling, and turn one-off security work into repeatable, self-service capabilities. The role combines deep hands-on offensive and defensive security expertise with the engineering mindset needed to automate at scale. You will work closely with development, QA, DevOps, and platform teams. Responsibilities: Security Architecture & Threat Modelling: Lead security architecture reviews and threat modelling for new and existing systems, using AI tools to make reviews faster, more consistent, and scalable across teams Act as a security force multiplier by influencing the standards, patterns, and guardrails that let teams move fast and stay secure Security Automation & Tooling: Design, build, and automate scalable security processes that engineering teams can self-serve, covering secure design review, threat modelling, testing, and remediation workflows Integrate and automate security checks across the SDLC and CI/CD pipelines (SAST, DAST, SCA, secrets, and IaC scanning), tuned for strong signal and low friction Own and evolve security tooling such as DefectDojo and SAST, DAST, and SCA platforms, maximising automation, coverage, and integration Apply AI and LLM-based tooling to architecture review, threat modelling, code review, and vulnerability triage, and help define how the team adopts these tools safely Security Testing & Vulnerability Management: Conduct and oversee security assessments of web and mobile applications, APIs, and cloud infrastructure, including manual testing and PoC development Run vulnerability scans across internal infrastructure and the external perimeter, then analyse findings, define remediation, and track issues to closure Support and triage the Bug Bounty Program and external vulnerability reports, automating triage where possible Participate in and help lead red teaming and offensive security exercises Enablement: Drive knowledge sharing on secure development, mentor engineers, and deliver training for development and QA teams Requirements: Experience: 5+ years in application or product security, or equivalent depth, with a track record of senior or staff-level impact Demonstrable experience leading security architecture reviews and threat modelling (e.g. STRIDE, attack trees, data-flow analysis) across multiple teams or products Proven ability to automate and scale security processes by building tooling, integrations, and self-service workflows that reduce manual effort Technical: Strong hands-on security testing skills, including code review and web, mobile, and API application security assessments, as well as the ability to triage and validate external vulnerability reports and bug bounty submissions Strong software engineering ability in at least one language (e.g. Python, Go, JavaScript), with the ability to build automation, not just scripts Deep understanding of the OWASP Top Ten, secure design, and secure coding best practices Experience with SAST, DAST, SCA, and vulnerability management platforms, and integrating them into CI/CD Strong understanding of modern application architectures: REST APIs, microservices, cloud-based systems, and containers Practical experience applying AI and LLM tooling to security work, or clear enthusiasm and aptitude to do so Collaboration: Excellent communication and influencing skills: you can explain security concepts to technical and non-technical stakeholders and drive change without direct authority A self-starter who enjoys solving complex problems, building leverage through automation, mentoring others, and strengthening security culture Nice to have: Experience securing the AI harness: hardening LLM and agent pipelines, prompts, tool and MCP integrations, and model endpoints against prompt injection, data leakage, and insecure agent actions Experience securing Kubernetes, including cluster hardening, RBAC, network policies, admission control, workload isolation, and image and supply-chain security Experience securing AWS infrastructure, including IAM, network and account architecture, key and secret management, and CSPM Experience building AI-assisted security tooling or internal self-service security platforms Experience mentoring or technically leading a security team Offensive or advanced security certifications such as OSAI, OSEP, OSCP, or OSWE What you'll get in return: You will join the company, that cares about work and life balance Annual Bonus based on the performance review cycle Generous Annual Leave Policy Medical Insurance and Pension fund, with additional benefit packages based on the location Hybrid working model (3 days from our modern office and 2 days fully remotely) Comprehensive Workation Policy with 30 more remote days available. Possibility of taking two additional days of paid leave per year to dedicate to volunteering efforts.

Location: Limassol, Cyprus Workplace: on-site Mayflower is a technology company building high-load products used by millions of people worldwide. Operating at the scale of one of the world's top-50 websites, we solve complex engineering challenges and create solutions that power real-time entertainment for a global audience. We are looking for a Lead ML Engineer to own a new ML stream focused on fast delivery of applied machine learning solutions across different product and business domains. The stream will work with a broad range of ML challenges. Some initiatives may be relatively small and delivered within a few weeks, while others may prove their value and grow into larger dedicated projects. This role combines hands-on ML engineering with end-to-end technical delivery ownership. You will receive product problems and expected outcomes from Product or internal stakeholders, clarify the technical requirements and constraints, define the implementation approach, coordinate execution within the stream, and bring solutions to production readiness and launch. This is a highly hands-on role. The stream will not have a dedicated software engineer for every initiative, so we expect Data Scientists and ML Engineers to be comfortable working beyond experimentation and contributing directly to production code. The role is not tied to a single ML domain. We value strong ML fundamentals, engineering skills, pragmatism, and the ability to quickly understand new problem areas more than deep specialization in one particular class of models. Job Responsibilities Technical Delivery Ownership Turn product and business problems into concrete ML implementation plans. Clarify requirements, constraints, available data, integrations, and success criteria together with Product and relevant stakeholders. Define technical scope, milestones, dependencies, risks, and delivery estimates. Select appropriate ML approaches and determine the fastest reliable way to validate and implement them. Drive technical delivery through experimentation, implementation, integration, deployment, and launch readiness. Keep delivery on track, proactively identify blockers, and coordinate dependencies with other teams. Provide Product with clear technical options, trade-offs, estimates, risks, and experiment results required for product decisions. Support production rollout and iteration based on observed results. Hands-on ML & Engineering Design, train, evaluate, and deploy ML models across different domains and problem types. Write production-quality Python and contribute directly to implementation. Build APIs, batch jobs, data-processing pipelines, and ML services required to deliver solutions where appropriate. Work with classical ML, deep learning, and foundation-model-based approaches depending on the problem. Process and transform large production datasets using Python and SQL. Integrate models into existing production systems. Implement appropriate testing, monitoring, logging, and observability for delivered ML solutions. Work within the shared ML infrastructure, architecture, and engineering practices used across the company. Collaborate with Data Science, Backend, Data Engineering, and MLOps specialists when deeper domain expertise or infrastructure changes are required. Stream Execution Break initiatives down into concrete technical tasks and coordinate execution within the stream. Coordinate the work of Data Scientists and ML Engineers contributing to stream initiatives. Review technical approaches, experiments, and implementation. Keep the team focused on the agreed scope, priorities, and delivery timeline. Identify technical risks and dependencies early and drive them to resolution. Escalate architectural, infrastructure, or methodological questions when broader alignment is required. Help prepare successful initiatives for scaling or transition into longer-term ownership if they grow beyond the scope of the stream. Cross-functional Collaboration Work closely with Product throughout the delivery lifecycle. Independently gather the technical details and constraints required to execute on a product request. Communicate estimates, dependencies, technical trade-offs, and delivery status clearly. Work directly with Engineering and other internal teams to unblock implementation. Challenge technically unclear, contradictory, or infeasible requirements and propose practical alternatives. You’ll thrive here if you have 5+ years of commercial experience in Machine Learning, Data Science, or ML Engineering. Strong hands-on Python programming and software engineering skills. Experience taking ML solutions from a product requirement through experimentation, implementation, integration, and production. Strong understanding of machine learning methods, statistics, experimentation, and model evaluation. Experience writing maintainable production code rather than working exclusively in notebooks. Experience building APIs, services, batch processing, or data pipelines. Strong SQL skills and experience working with large production datasets. Practical experience with Docker and production deployment environments. Ability to turn partially defined problems into concrete technical plans. Ability to estimate work, identify dependencies and risks, and drive technical execution against a timeline. Experience owning technical delivery involving several contributors and coordinating work across dependencies. Experience reviewing code and technical approaches. Ability to work effectively within established engineering and ML practices while independently owning delivery within a stream. Strong communication skills and the ability to work directly with Product and technical stakeholders. Ability to balance speed and engineering quality: validate ideas quickly when uncertainty is high and build robust solutions when moving towards production. Nice to Have Previous experience as a Tech Lead, Stream Lead, or technical owner of ML initiatives. Experience with Kubernetes and CI/CD. Experience with Kafka or other streaming platforms. Experience with Airflow, MLflow, experiment tracking, model monitoring, or similar tooling. Experience building real-time or high-load ML services. Experience with FastAPI or similar Python service frameworks. Experience across several ML domains, such as recommendation systems, ranking, NLP/LLMs, Computer Vision, anomaly detection, forecasting, or classification. Experience with LLM inference, fine-tuning or other GenAI systems. Experience in teams where Data Scientists and ML Engineers own a substantial part of production implementation themselves.

Location: Warsaw, Mazowieckie, Poland; Sofia City, Bulgaria; Limassol, Cyprus Workplace: hybrid Capital.com builds and operates web and mobile trading platforms, public and partner APIs, and the backend services behind them, all in a highly regulated environment. As Application Security Architect, you will be the senior design authority for the security of these products. You will set the direction for how we secure software at scale: you will own secure-by-design patterns and standards, lead threat modelling and architecture reviews, and define the application security baseline that engineering teams build against. Working closely with the Product Security team and the Director of Product Security, you will guide AppSec processes and set the vision for your area without direct line management. You will treat security as a shared outcome rather than a gate, balancing strong protection with developer experience and delivery speed, and you will earn adoption through enablement rather than mandates. Responsibilities: Security Architecture & Standards: Define and maintain secure-by-default reference architectures for common patterns: web apps, mobile backends, microservices, public and partner APIs, and event-driven services Own core application security architecture decisions: authentication and authorisation, session management, API security, secrets management, multi-tenant isolation, and security logging and auditing Lead the redesign of user authentication and the delivery of security features into the product Develop and roll out application security standards, secure-coding guidelines, configuration standards, reusable design patterns, and architecture decision records (ADRs) that engineers can apply without a security expert in the room Define internal policies for the safe use of AI-assisted and vibe-coding tools Define security requirements for acquired technology and guide its secure integration Threat Modelling & Design Review: Establish and run a threat-modelling operating model, covering scope, cadence, templates, and facilitation, proportionate to each product's risk tier Own the security review stage of the new product approval process, covering architecture design and configuration Lead design reviews for high-impact initiatives: new products, new auth flows, payment and sensitive-data flows, platform migrations, and major refactors Identify design-level risks and agree practical, prioritised mitigations with engineering teams Secure SDLC, DevSecOps & Supply Chain: Assess the current state of application security, propose improvements, and drive the secure SDLC strategy with Engineering and Security leadership Oversee AppSec processes and own the tooling strategy (SAST, DAST, IAST, SCA, and secrets scanning), including how findings flow back to engineering Embed security controls as guardrails in CI/CD through policy-as-code, with agreed enforcement and escalation paths Partner with DevOps to organise repository management and prevent supply-chain attacks, covering safe component usage, dependency management, SBOMs, and build integrity Improve the security of our internal tools Requirements: Experience: 8+ years in technology, including 5+ years in a dedicated application or product security role, with a strong engineering background and hands-on architecture or design ownership Proven track record creating, documenting, and rolling out security standards, patterns, and best practices across a complex engineering organisation Deep, demonstrable threat-modelling experience across product portfolios Technical: Experience designing and implementing a secure SDLC in a cloud-native environment. Strong AWS knowledge is required, and exposure to GCP or other clouds is welcome Strong command of OWASP standards (Top 10, ASVS) and DevSecOps practice, including AppSec tooling (SAST, DAST, IAST, SCA, secrets scanning) and vulnerability management Deep understanding of modern distributed architectures: microservices, REST and GraphQL APIs, event-driven systems, OAuth2/OIDC, and containerised workloads (Docker, Kubernetes). You should be able to reason about their trust boundaries, attack surface, and data flows across web and mobile clients Collaboration: Exceptional ability to influence and align engineering teams without direct authority, and to brief both engineers and executives Pragmatism and strategic thinking: you balance the ideal with the achievable, protect delivery throughput, and turn long-term direction into an actionable plan Clear written communication through diagrams, ADRs, and patterns, plus a track record of mentoring and cross-functional collaboration Nice to have: Experience in fintech, trading, brokerage, or another regulated environment Awareness of relevant regulatory and compliance drivers: FCA and CySEC operational resilience, GDPR, and PCI DSS Software supply-chain security, including SBOMs and artifact and build integrity Experience securing AI-integrated product features, or using AI to scale an AppSec programme Experience building or running a Security Champions programme CSSLP, GIAC GDSA, or a hands-on offensive security certification. Certifications are valued but secondary to demonstrated experience What you'll get in return: You will join the company, that cares about work and life balance Annual Bonus based on the performance review cycle Generous Annual Leave Policy Medical Insurance and Pension fund, with additional benefit packages based on the location Hybrid working model (3 days from our modern office and 2 days fully remotely) Comprehensive Workation Policy with 30 more remote days available. Possibility of taking two additional days of paid leave per year to dedicate to volunteering efforts.