Вакансии

• Разрабатывать full-stack-функции: от схемы данных и API до интерфейса и деплоя. • Создавать AI-агентов, инструменты ассистентов, retrieval и streaming-системы.

Location: Bulgaria, Georgia, Poland, Romania, Uzbekistan Why Join Exadel We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks. From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next. What powers it all? Our people are ambitious, collaborative, and constantly evolving. About the Client Our client is one of the Big Four accounting firms and the world’s largest professional services network. Headquartered in London, they operate in 150+ countries with 460,000+ professionals delivering excellence in audit, tax, consulting, and advisory. About the Role You will focus on partnering with the Development, DevSecOps, and Cyber teams to create, implement, and apply Microsoft best practices, principles, processes, and culture regarding DevOps within an Azure-hosted environment. You will provide subject matter expertise on application design, infrastructure, monitoring, and GitHub pipeline development, leading our engineering teams in building secure software and development and implementing security controls in an Agile environment. Project Tech Stack Azure Cloud, Microservices Architecture, .NET 8, ASP.NET Core services, Python, Mongo, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot What You’ll Do Advocate for the application teams; DB Services, Cybersecurity, DevOps, and Agile engineering procedures, quality engineering practices, and advanced requirement capturing techniques for improving end-to-end secure delivery practices Design and implement strategies for collaboration, code, infrastructure, source control, security, compliance, continuous integration, testing, delivery, monitoring, and feedback with a heavy focus on DB infrastructure and automation Manage Github Actions Pipelines with a heavy emphasis on custom flows and actions as well as Azure DevOps projects (minor). This will include implementing automation tools and frameworks for CI/CD pipelines Assist with the configuration and setup of Azure SQL, MongoDB Atlas, and PostgreSQL (future) following MS best practices Responsible for day-to-day collaboration with the different application/asset teams to ensure the successful implementation of secure coding practices and integration of secure application and design processes across Deloitte. Supports the Secure Systems Development Lifecycle (SSDLC), including functional and non-functional cybersecurity and DB requirements Monitor systems, identify performance bottlenecks, and implement solutions in a proactive manner Develop and maintain design and troubleshooting documentation Provide training and support to internal teams, peers, and stakeholders Plan DR measures and maintain data storage security in Azure What You Bring Extensive professional of experience in DevOps engineering and Software Engineering Working with Secure CI/CD pipelines (mainly GitHub Actions & Flows) and ALM tools to automate security requirements validation tasks Programming skills in one or more of the following programming and markup languages: Java, .Net, Terraform, Python, Visual Basic, PowerShell, Bash, C++, C#, Django, JavaScript, YAML, HTML, CSS, etc. Hands-on experience with containerization, orchestration, and Cloud infrastructure management (e.g., Infrastructure as Code, immutable infrastructure, Configuration as Code) Understanding and experience with Azure SQL and Mongo is a requirement Background in Kubernetes (AKS) and Linux is a requirement Expertise in Azure cloud services (Azure SQL, Azure ServiceBus, Azure Redis, KeyVaults, Azure Storage, etc) is a requirement Understanding of network architectures and services (e.g., VPN, routing, firewall, NSGs, etc.) Knowledge of Source Code Management concepts (e.g., code lines, branching, merging, integration, versioning). Proficiency in using Git for version control is a must Ability to translate traditional SDLC approach (plan, code, build, test, release, deploy, and monitor) to the phases of agile development when writing software to automate security-related tasks Nice to Have Knowledge of CI/CD Pipeline creation in Azure DevOps Azure certifications (e.g., Azure DevOps engineer expert and Azure Administrator Associate) English level Intermediate Legal & Hiring Information Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more. Reasonable accommodations are available to enable individuals with disabilities to perform essential functions. Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs. Compensation details are shared with candidates at the early stage of the recruitment process. The offer is not binding until a signed contract is in place. Your Benefits at Exadel Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details. International projects In-office, hybrid, or remote flexibility Medical healthcare Recognition program Ongoing learning & reimbursement Well-being program Team events & local benefits Sports compensation Referral bonuses Top-tier equipment provision Exadel Culture We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.

Location: New York, NY (HQ); Remote (Canada); Remote (US) Workplace: Hybrid ABOUT RAMP Ramp is building the smart infrastructure for finance teams, embedded in the transaction flow of every dollar a business spends. We automate how over $275B in annualized spend flows in and out of 85,000+ companies: authorizing payments, flagging risk, categorizing spend, and closing books. The problems are high-stakes, data-dense, and unforgiving. We hire people with high agency and high urgency. We look for slope over intercept. We care less about where you trained and more about what you’ve built. At Ramp, everyone is a builder who owns problems end to end and makes consequential decisions that shape the outcome. The median Ramp customer saves 7.5% and grows revenue 16% in their first year – far in excess of businesses operating without Ramp. We believe every ambitious company deserves the same. If you want to build systems that directly shape how companies move and manage billions, Ramp is the place to do it. ABOUT THE ROLE Ramp’s Token Spend Management team helps finance and technical teams understand and manage what they spend across AI providers and subscriptions. We are building the third pillar https://ramp.com/blog/ramp-at-44-billion-the-third-pillar of finance. The product brings provider usage and billing information together so customers can see where costs come from, attribute spend, and act on it with greater confidence. We’re looking for a senior backend engineer to build the systems behind that experience. You’ll own substantial projects from design through production, turn data from different providers into dependable product experiences, and work with product, design, data, and engineering partners to make complex spend information useful to customers. You will be involved in key company initiatives such as inference accounting, and figuring out new and novel ways to help companies not just manage, but think about their AI Spend. WHAT YOU’LL DO - Design and build backend services and APIs that support AI spend visibility, attribution, insights, and controls - Build and improve integrations that ingest usage and billing information from supported providers - Taking the data from those integrations and converting it into helpful structures for external customers, and internal product consumers - Create reliable data models and processing workflows that make spend information accurate, traceable, and useful across the product - Own projects from technical design through launch, monitoring, and iteration - Improve the reliability, performance, and observability of systems as customer usage and provider coverage grow - Partner with product, design, data, and engineering teammates to turn customer needs into practical solutions - Raise the engineering bar through thoughtful design reviews, code reviews, and mentorship WHAT YOU’LL NEED - Experience designing, building, and operating production backend systems, including APIs, data models, and asynchronous workflows - Strong judgment about system design, data correctness, reliability, and when to keep a solution simple - A track record of independently owning complex projects and shipping high-quality software - Experience working with external data sources or integrations where data quality and changing interfaces matter - Comfort working through ambiguous product problems with cross-functional partners - Clear communication and a collaborative approach to technical decisions and feedback NICE TO HAVES - Experience with usage metering, billing, spend management, or financial data products - Experience integrating with AI providers or other third-party usage and billing APIs - Experience building attribution, alerts, limits, or other systems that help customers understand and manage spend BENEFITS AVAILABLE TO ALL FULL-TIME RAMP EMPLOYEES (GLOBAL) - Flexible PTO - Centralized home-office equipment ordering - Health and wellness stipend - Budget for intra-office travel - Weekly coffee stipend UNITED STATES - 100% medical, dental & vision insurance coverage for you, with partial coverage for dependents - One Medical annual membership - 401(k), including employer match on contributions made while employed by Ramp - Fertility HRA (up to $10,000 per year) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay - Pet insurance - In-office perks: lunch, snacks, drinks, and more - Relocation expense coverage to NYC or SF (if needed) CANADA - Group medical, dental, and vision coverage through Sun Life - Life, AD&D, and disability coverage - Fertility drug coverage (up to $4,000 lifetime) - Group Retirement Plan with employer match (RRSP + DPSP) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay, with additional time available at reduced pay - Employee Assistance Program and virtual care through Lumino Health UNITED KINGDOM - Private medical insurance through Freedom Elite - Virtual GP and at-home care via eMed x Livi - Workplace pension through Penfold, with salary sacrifice option - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay with additional time available at reduced pay REFERRAL INSTRUCTIONS If you are being referred for the role, please contact that person to apply on your behalf.   OTHER NOTICES Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.   Beware of recruiting scams: Ramp will only contact you through official @Ramp.com http://Ramp.com email addresses and will never ask for payment or sensitive personal information during the hiring process.   Ramp Applicant Privacy Notice https://ramp.com/legal/applicant-privacy-notice

Location: Global We are the creators of a new fintech era! Our mission is to change this world by making blockchain accessible to everyone in everyday life. WhiteBIT is a global team of over 1,200 professionals united by one mission — to shape the new world order in the Web3 era. Each of our employees is fully engaged in this transformative journey. We work on our blockchain platform, providing maximum transparency and security for more than 8 million users worldwide. Our breakthrough solutions, incredible speed of adaptation to market challenges, and technological superiority are the strengths that take us beyond ordinary companies. Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT and VISA. The future of Web3 starts with you: Join us as an General QA engineer! Requirements Education & Experience Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or a related STEM field. 3+ years of experience in QA Engineering or Software Testing in a high-throughput or low-latency environment. Experience with quantitative systems, HFT, trading platforms, or financial applications is highly preferred. Core Technical Skills Strong knowledge of software testing methodologies, SDLC best practices, and quality assurance processes. Experience testing REST APIs and WebSocket-based services. Proficiency in SQL for data validation, troubleshooting, and debugging. Experience with API testing tools such as Postman. Hands-on experience with monitoring and observability tools such as Grafana, Prometheus, or Kibana. Confident working knowledge of Linux command-line tools, logs, system utilities, and process monitoring. Experience working with Docker. Proficiency in scripting or programming languages such as Python or Java. Experience with test automation frameworks and libraries such as Pytest, Selenium, or Pandas. Familiarity with version control systems and CI/CD workflows. Experience with automated testing, continuous integration, and deployment processes. Trading & Quantitative Systems Knowledge Understanding of market microstructure and trading products, including spot, futures, and swaps. Familiarity with low-latency and high-frequency trading systems. Strong understanding of mathematics, statistics, and numerical methods relevant to quantitative trading. Ability to reason through quantitative problems and collaborate effectively with researchers, developers, and analysts. Analytical & Problem-Solving Skills Strong analytical and problem-solving skills. Ability to independently investigate and solve complex technical issues. Strong focus on quality, reliability, and system performance. Experience working with complex distributed systems is an advantage. Mindset & Soft Skills Strong interest in technology, quantitative finance, and continuous learning. Team-oriented mindset with strong communication and collaboration skills. High level of ownership, reliability, and attention to detail. Predictable availability to support stable operation of production trading systems when required. Responsibilities As a QA Engineer, you will be part of a high-performance team responsible for developing and maintaining low-latency infrastructure, HFT and quantitative systems, and real-time risk management tools. You will work closely with developers, analysts, researchers, and system engineers to ensure system reliability, scalability, performance, and quality. Key Responsibilities: Design, develop, and execute comprehensive test plans for trading infrastructure and internal tools. Build and maintain automated test suites for real-time quantitative systems and APIs. Ensure adequate test coverage for low-latency, high-availability, and scalable systems. Collaborate with developers and analysts to clarify requirements, identify edge cases, and align testing with business and technical objectives. Investigate, reproduce, and debug issues in complex distributed systems. Contribute to performance testing, latency benchmarking, and system monitoring. Support CI/CD pipelines through automated testing strategies. Maintain high standards of test documentation and test coverage. Working terms Immerse yourself in Crypto & Web3:Master cutting-edge technologies and become an expert in the most innovative industry. Master cutting-edge technologies and become an expert in the most innovative industry. Work with the Fintech of the Future: Develop your skills in digital finance and shape the global market. Take Your Professionalism to the Next Level: Gain unique experience and be part of global transformations. Drive Innovations: Influence the industry and contribute to groundbreaking solutions. Join a Strong Team: Collaborate with top experts worldwide and grow alongside the best. Work-Life Balance & Well-being: Modern equipment. Comfortable working conditions, and an inspiring environment to help you thrive. 24 calendar days of paid leave. Additional days off for national holidays. With us, you’ll dive into the world of unique blockchain technologies, reshape the crypto landscape, and become an innovator in your field. If you’re ready to take on challenges and join our dynamic team, apply now and start a new chapter in your career! Let’s Build the Future Together! WhiteBIT offers all candidates an equal opportunity to join the team. All hiring decisions are made without regard to race, national origin, gender identity or sexual orientation, age, religion, disability, medical condition, marital status, familial status, veteran status, or any other legally protected characteristic of an individual.

Основные задачи Разработка и развитие backend-инфраструктуры на Elixir/OTP. Проектирование высоконагруженных, масштабируемых и отказоустойчивых систем.

Location: New York, NY (HQ); Remote (Canada); Remote (US) Workplace: Hybrid ABOUT RAMP Ramp is building the smart infrastructure for finance teams, embedded in the transaction flow of every dollar a business spends. We automate how over $275B in annualized spend flows in and out of 85,000+ companies: authorizing payments, flagging risk, categorizing spend, and closing books. The problems are high-stakes, data-dense, and unforgiving. We hire people with high agency and high urgency. We look for slope over intercept. We care less about where you trained and more about what you’ve built. At Ramp, everyone is a builder who owns problems end to end and makes consequential decisions that shape the outcome. The median Ramp customer saves 7.5% and grows revenue 16% in their first year – far in excess of businesses operating without Ramp. We believe every ambitious company deserves the same. If you want to build systems that directly shape how companies move and manage billions, Ramp is the place to do it. ABOUT THE ROLE Getting paid is still one of the most manual parts of running a business. Finance teams chase invoices over email, match payments to invoices by hand in spreadsheets, and close the books late because cash data is scattered across banks, payment processors, and ERPs. Ramp's Accounts Receivable team is building the system that automates all of it, from the moment an invoice is sent to the moment cash is reconciled in the general ledger. We own the full receivables lifecycle: invoicing, collections, payments, cash application, and accounting sync. We're looking for a senior backend engineer to own core pieces of that system. The work sits where hard engineering problems meet real money: matching messy payment data to the right invoices, keeping ledgers correct to the cent, and syncing reliably with the accounting systems our customers depend on. You'll own projects end to end, from design through production, and work closely with product and design to turn complex finance workflows into software that just works. WHAT YOU’LL DO - Build the payment-matching systems that automatically apply incoming ACH, wire, card, and check payments to the right invoices, even when payment details are incomplete or inconsistent - Design accurate data models where every dollar is traceable from invoice to payment to general ledger - Build two-way integrations with ERPs like NetSuite and QuickBooks that stay consistent through retries, partial failures, and edits on either side - Build collections workflows that help businesses get paid faster without hurting their customer relationships - Own projects from problem definition and technical design through launch, monitoring, and iteration - Raise the engineering bar through design reviews, code reviews, and mentorship WHAT YOU’LL NEED - Product sense: you care about the customer problem, not just the ticket, and you push back when the spec is wrong - Experience designing and operating production backend systems, including APIs, data models, and asynchronous workflows - Strong system design judgment and the ability to balance speed, correctness, reliability, and simplicity - A track record of independently owning complex projects and shipping high-quality software - Strong communication skills and a collaborative approach to technical decisions NICE TO HAVES - Experience with invoicing, billing, payments, accounting, or other financial workflows - Experience building integrations that keep data consistent across systems - Experience improving reliability and operational visibility in a growing product BENEFITS AVAILABLE TO ALL FULL-TIME RAMP EMPLOYEES (GLOBAL) - Flexible PTO - Centralized home-office equipment ordering - Health and wellness stipend - Budget for intra-office travel - Weekly coffee stipend UNITED STATES - 100% medical, dental & vision insurance coverage for you, with partial coverage for dependents - One Medical annual membership - 401(k), including employer match on contributions made while employed by Ramp - Fertility HRA (up to $10,000 per year) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay - Pet insurance - In-office perks: lunch, snacks, drinks, and more - Relocation expense coverage to NYC or SF (if needed) CANADA - Group medical, dental, and vision coverage through Sun Life - Life, AD&D, and disability coverage - Fertility drug coverage (up to $4,000 lifetime) - Group Retirement Plan with employer match (RRSP + DPSP) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay, with additional time available at reduced pay - Employee Assistance Program and virtual care through Lumino Health UNITED KINGDOM - Private medical insurance through Freedom Elite - Virtual GP and at-home care via eMed x Livi - Workplace pension through Penfold, with salary sacrifice option - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay with additional time available at reduced pay REFERRAL INSTRUCTIONS If you are being referred for the role, please contact that person to apply on your behalf.   OTHER NOTICES Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.   Beware of recruiting scams: Ramp will only contact you through official @Ramp.com http://Ramp.com email addresses and will never ask for payment or sensitive personal information during the hiring process.   Ramp Applicant Privacy Notice https://ramp.com/legal/applicant-privacy-notice

Задачи: — Управление полным циклом разработки в кросс-функциональной команде (6–12 человек): от анализа бизнес-требований и проектирования до релиза и эксплуатации. — Формирование новых продуктовых стримов: найм, сборка команд с нуля и участие в разработке на этапе запуска. — Архитектура сервисов команды, согласование технического видения с кросс-командами и архитекторами, системная работа с техдолгом. — Обеспечение качества и надежности: наблюдаемость (observability), отказоустойчивость, инцидент-менеджмент. — Совместная работа с Product Manager: формирование, оценка и приоритизация бэклога. — Развитие инженерной культуры: проведения 1:1, PDP, менторство и технические интервью. Требования: — Опыт управления командами бэкенд-разработки от 3 лет. — Глубокая экспертиза в бэкенде (Java / Go), готовность погружаться в код и проводить code review. — Практический опыт построения процессов поставки (Scrum/Kanban) и регулярных релизов. — Опыт работы в финтех-индустрии, банковском секторе или высоконагруженных E-commerce / PayTech проектах. — Понимание принципов проектирования высоконагруженных и отказоустойчивых распределенных систем. — Опыт запуска продуктов или инженерных команд с нуля будет преимуществом. — Рабочий язык команды — русский. Условия: — Гибкий формат работы: полная удалёнка или поддержка при релокации в международный хаб компании. — Автономия в решениях: ответственность за архитектуру, процессы и формирование собственной команды. — Конкурентная заработная плата (обсуждается индивидуально по результатам интервью). — Компенсация подписок на AI-инструменты (ChatGPT, GitHub Copilot и др.)

Location: Remote USA Workplace: remote ABOUT XSOLLA Xsolla is a global video game commerce company headquartered in Los Angeles. It helps developers from indie to AAA fund, distribute, market and monetize their games, and acts as merchant of record for 1,500+ developers worldwide. For more information, visit xsolla.com. The role We are hiring a Software Engineer, Web3 for Xsolla ZK , Xsolla 's Web3 ecosystem on a zkSync-based L2. It includes: 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 senior fullstack role: you work across backend, frontend and smart contracts. WHAT YOU WILL OWN Features end to end: backend, frontend and production The on-chain / off-chain architecture of your product: what lives in contracts, what lives in services, and how the two stay consistent. You make these decisions and justify them in writing Security and correctness of what you ship: signing flows, interactions with contracts that hold user assets, keys and secrets Production operation of your services, as part of the team's on-call rotation WHAT YOU WILL DO Build backend services in Go and TypeScript: chain indexing, transaction relaying, event processing, APIs for dApps and SDKs Build infrastructure backend services for tokenizing in-game items and currencies Build dApp frontends in React: wallet connection, transaction signing, on-chain state in the UI Integrate smart wallets into products: accounts, paymasters, bundlers Develop SDKs used by game studios and partners Monitor services and contracts in production and take part in on-call Review code Set up and maintain AI tooling in the repositories (Claude Code, Codex, Cursor: rules, context, harness) so the team uses it effectively Required Experience 5+ years of commercial software development, with senior-level production experience across backend and frontend dApps that you shipped to production and maintained Web3 libraries and wallets viem and wagmi in production: clients and transports, contract reads and writes with typed ABIs, event subscriptions, wagmi hooks and connectors, caching and invalidation of on-chain state How wallet signers work: EOAs, browser and embedded wallets, smart accounts; personal_sign (EIP-191) and typed data (EIP-712); the EIP-1193 provider; network switching Hands-on experience with smart wallets: UserOperations, gas sponsored via paymasters, signature validation for contract accounts (ERC-1271) Backend Go and TypeScript (Node.js) for production services Processing on-chain events: idempotency, reorg handling, retries Asynchronous messaging and event-driven design (Kafka, RabbitMQ or NATS ): delivery guarantees, ordering, reprocessing Relational databases (PostgreSQL) and caching (Redis) Designing REST and gRPC APIs: versioning, backward compatibility Frontend React and TypeScript: rendering model, state management, performance Web security fundamentals: XSS , CSRF , CSP , safe handling of signatures and keys in the browser Smart contracts Reading and understanding Solidity contracts and the EVM (storage, gas, call semantics, proxy upgrade patterns, access control) well enough to integrate with them safely and review changes Common contract vulnerability classes (reentrancy, front-running / MEV , oracle manipulation, signature replay) and how they affect the off-chain side Operations Containers and orchestration (Docker, Kubernetes) at the level of deploying and debugging your own services Observability (we use Datadog; experience with Prometheus, Grafana, ELK / Graylog or OpenTelemetry also counts): metrics, logs, tracing and alerting for services and contracts; diagnosing incidents in production Engineering practices Testing: unit, integration, E2E Git, CI/CD (GitLab CI or similar) 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 zkSync / ZK Stack and the specifics of the zk -rollup stack Designing, writing and testing smart contracts in Solidity with Foundry; deploying and upgrading them safely Building ERC-4337 infrastructure yourself (bundlers, paymasters); EIP-6963, EIP-5792 DeFi: DEX and AMM mechanics NFTs and marketplaces: ERC-721, ERC-1155, auction mechanics L2 infrastructure: running nodes, indexers, bridges Designing SDKs for external developers Gaming domain experience 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 directly on the What you will own and Required sections above. We won't ask about anything this posting doesn't promise. Bar raiser. An engineer from outside the hiring team checks that you raise the overall engineering bar. THE TEAM You will work alongside product managers, designers, smart contract, backend and frontend engineers, QA and DevOps. 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 (worldwide) 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: Russia Workplace: remote ABOUT XSOLLA Xsolla is a global video game commerce company headquartered in Los Angeles. It helps developers from indie to AAA fund, distribute, market and monetize their games, and acts as merchant of record for 1,500+ developers worldwide. For more information, visit xsolla.com. The role We are hiring a Software Engineer, Web3 for Xsolla ZK , Xsolla 's Web3 ecosystem on a zkSync-based L2. It includes: 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 senior fullstack role: you work across backend, frontend and smart contracts. WHAT YOU WILL OWN Features end to end: backend, frontend and production The on-chain / off-chain architecture of your product: what lives in contracts, what lives in services, and how the two stay consistent. You make these decisions and justify them in writing Security and correctness of what you ship: signing flows, interactions with contracts that hold user assets, keys and secrets Production operation of your services, as part of the team's on-call rotation WHAT YOU WILL DO Build backend services in Go and TypeScript: chain indexing, transaction relaying, event processing, APIs for dApps and SDKs Build infrastructure backend services for tokenizing in-game items and currencies Build dApp frontends in React: wallet connection, transaction signing, on-chain state in the UI Integrate smart wallets into products: accounts, paymasters, bundlers Develop SDKs used by game studios and partners Monitor services and contracts in production and take part in on-call Review code Set up and maintain AI tooling in the repositories (Claude Code, Codex, Cursor: rules, context, harness) so the team uses it effectively Required Experience 5+ years of commercial software development, with senior-level production experience across backend and frontend dApps that you shipped to production and maintained Web3 libraries and wallets viem and wagmi in production: clients and transports, contract reads and writes with typed ABIs, event subscriptions, wagmi hooks and connectors, caching and invalidation of on-chain state How wallet signers work: EOAs, browser and embedded wallets, smart accounts; personal_sign (EIP-191) and typed data (EIP-712); the EIP-1193 provider; network switching Hands-on experience with smart wallets: UserOperations, gas sponsored via paymasters, signature validation for contract accounts (ERC-1271) Backend Go and TypeScript (Node.js) for production services Processing on-chain events: idempotency, reorg handling, retries Asynchronous messaging and event-driven design (Kafka, RabbitMQ or NATS ): delivery guarantees, ordering, reprocessing Relational databases (PostgreSQL) and caching (Redis) Designing REST and gRPC APIs: versioning, backward compatibility Frontend React and TypeScript: rendering model, state management, performance Web security fundamentals: XSS , CSRF , CSP , safe handling of signatures and keys in the browser Smart contracts Reading and understanding Solidity contracts and the EVM (storage, gas, call semantics, proxy upgrade patterns, access control) well enough to integrate with them safely and review changes Common contract vulnerability classes (reentrancy, front-running / MEV , oracle manipulation, signature replay) and how they affect the off-chain side Operations Containers and orchestration (Docker, Kubernetes) at the level of deploying and debugging your own services Observability (we use Datadog; experience with Prometheus, Grafana, ELK / Graylog or OpenTelemetry also counts): metrics, logs, tracing and alerting for services and contracts; diagnosing incidents in production Engineering practices Testing: unit, integration, E2E Git, CI/CD (GitLab CI or similar) 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 zkSync / ZK Stack and the specifics of the zk -rollup stack Designing, writing and testing smart contracts in Solidity with Foundry; deploying and upgrading them safely Building ERC-4337 infrastructure yourself (bundlers, paymasters); EIP-6963, EIP-5792 DeFi: DEX and AMM mechanics NFTs and marketplaces: ERC-721, ERC-1155, auction mechanics L2 infrastructure: running nodes, indexers, bridges Designing SDKs for external developers Gaming domain experience 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 directly on the What you will own and Required sections above. We won't ask about anything this posting doesn't promise. Bar raiser. An engineer from outside the hiring team checks that you raise the overall engineering bar. THE TEAM You will work alongside product managers, designers, smart contract, backend and frontend engineers, QA and DevOps. 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: London 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 will grow you faster than you expect - the deals, the pace, and the people demand it. If you've ever felt a role never let you show what you're truly capable of, this is the opposite problem: meaningful deals with some of the UK's and the world's biggest brands, real autonomy, and no ceiling on what you can take on. You'll join the Solutions team in London and own the technical side of deals from first conversation to go-live. Pre-sale, you're front and centre: positioning the platform, building demos and POCs, winning over the merchant's engineers and architects while your Account Executive drives the commercial thread. Once the deal is ready, the weight shifts: our Implementation Engineers lead the build and you stay close, so your designs survive contact with reality. You'll work on a modern, fast-moving platform with docs that answer your questions, alongside one of the strongest commercial teams in payments. People who do well here are curious by default: they pull threads, teach themselves what the job needs next, and act before anyone asks. If that's how you work, you'll like it here. What you will be doing: - Support the commercial team to position Checkout.com http://Checkout.com's products, solutions, and services - and win deals. You'll be a key partner to Account Executives on product, payments, regulation, and tech. - Understand merchant requirements and technical needs, map them to our APIs and products, create solution designs and internal documentation. - Run demos, build "show-me" payment flows, create POCs, customise and create presentations. - Provide thought leadership on all aspects of Payment Performance - Acceptance Rate, Fraud Prevention, Tokenisation, Payment Methods, and others. - Lead all technical interactions with merchants - chats, calls, meetings, and workshops - from first contact through go-live, partnering with our Implementation Engineers during integration. - Support the BID management team with RFP and RFI responses. - Enable internal functions, commercial and tech, with market and merchant feedback on product capabilities. Champion product change and improvement. - Stay up to date with industry standards, solutions, and tech. - Be an expert on Checkout.com http://Checkout.com's platform and products. About You: If the list below looks like you, apply. Experience - 2+ years as a Sales Engineer, Solutions Architect, Pre-Sales Consultant, Implementation Engineer, or TAM. At a PSP or payments company is a bonus. - Merchant-side counts too: checkout engineering, an in-house payments team, a payments product role. - Experience in a technical, client-facing role. Payments and technical skills We need real depth in one of the two areas below and the appetite to close the gap on the other. If payments is your strength, this job will make you more technical, you'll need to want that. Strong coder lighter on payments: payments can be taught, you'll have time. Payments: - Understanding of the end-to-end payment flow and the industry's rules, regulations, and schemes. - Experience with 3DS, Network Tokenisation, Apple/Google Pay, APMs, Open Banking, or fraud-risk engines. Tech: - You can code and you're comfortable with web technologies - payments run on the web. At least one front-end (JavaScript, React, Angular) or back-end (Java, .NET, Python, Node) language. - Familiar with API-based integration (REST/JSON, Postman); can reproduce, isolate, and explain issues using logs, API responses, and tests. How you work - Clear written and verbal English; equally at home with developers and product teams as with payments, finance, and C-level stakeholders. - Commercially minded: you talk revenue, volume, and pricing, not just APIs, and push deals forward without being asked. - Highly organised; able to prioritise shifting workloads. Nice to have: - Previous exposure to RFI/RFP processes. - Familiarity with PSD2/PSD3/PSR, FCA, ISO-8583. - An additional language. - Former engineering, developer, or product manager background. - Prior roles in the e-commerce industry. Not sure whether to apply? Build a working payment demo using our public docs at docs.checkout.com http://docs.checkout.com and send it to kate.moore@checkout.com. A working demo tells us more than a perfect CV. 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/

• От 7 лет опыта в Python. • Сильный бэкграунд в Data Engineering, построении масштабируемых data pipelines и архитектуре ПО.

- Build the console screens finance teams use daily: agent spending, decisions behind payments, and approval queues. - Implement a policy editor that turns spending rules into readable, publishable policies with change history.

Location: Athens Workplace: Remote About the company: KIEFER is building Greece's integrated AI ecosystem. From renewable energy infrastructure and AI systems to robotics and enterprise applications, we connect the technologies that power Europe's intelligent future. Founded in 2014, KIEFER has delivered 600MW+ of energy projects and is now developing sovereign AI infrastructure, enterprise AI products and physical AI systems for Greece and Southeast Europe. About the role We are looking for an MLOps Engineer to build the infrastructure and tools that support ML work at Kiefer Tech. Our work spans Sophea AI language model, the Sophea Nous RAG platform, robotics, and Hyperion X, our energy trading platform. You will work closely with ML and Engineering teams to make experiments reproducible and model deployment and production operations reliable. What you will do - Build workflows for running and managing model training and fine-tuning jobs. - Make experiments traceable through dataset, checkpoint, and model artifact versioning. - Automate model evaluation and release checks so teams can compare changes before deployment. - Build deployment and serving workflows, including safe rollout and rollback of model versions. - Improve GPU workload scheduling and utilization, with attention to performance and compute cost. - Add monitoring and troubleshooting tools for production ML systems, and work with teams to resolve recurring issues. What you will need - Hands-on experience building or operating infrastructure for production ML systems. - Strong Python and Linux skills, with the ability to write maintainable production code. - A practical understanding of the ML lifecycle, from experiments and evaluation to model deployment. - Experience with containers, workload orchestration, CI/CD, and infrastructure automation. - Experience working with GPU workloads and measuring performance, utilization, and cost. - Experience monitoring and troubleshooting production systems. Nice to have - Experience with LLM serving tools such as vLLM, SGLang, or NVIDIA Triton. - Experience with distributed or multi-GPU training. - Experience with ML tooling such as MLflow, Weights & Biases, Kubeflow, or Ray. - Experience supporting ML workloads in private cloud or on-premises environments with data governance requirements. What is there for you - Compensation: Competitive package aligned with talent benchmarks. - Impact: Hands-on work shaping AI capabilities for Kiefer Tech’s products and real-world applications. - AI-native environment: Real challenges across model development, evaluation, and production AI systems. - Culture: Engineering-first, high autonomy, low bureaucracy, and space to shape meaningful AI products.

Location: Remote Workplace: Remote Kit https://kit.com/ is the email marketing platform experts choose to grow their audience, deepen their relationships, and build a business around the work they love. For coaches, YouTubers, authors, podcasters, and other creatives, there isn't a better marketing hub to rely on to grow audiences, automate email marketing, and sell digital products — all within one platform. More importantly, there isn't a team more committed to helping creators earn a living. We're on a mission to help creators earn $1 billion using our creator marketing platform. We have always been 100% independent and 100% remote. We are proud to have built a product that our customers love, and we look for people who have enthusiasm and belief in our mission, vision, and values to join our team. We're also embracing AI thoughtfully — both in how we build and how we hire to ensure our team is adaptable, innovative, and ready for what's next. THE ROLE We're looking for a Senior Infrastructure Engineer II to take ownership of a large share of Kit's core infrastructure: databases, Kubernetes, version upgrades, platform tooling, and day-to-day support. You'll also build the paved paths that let engineers, non-engineers, and AI agents test and ship changes safely. The infrastructure supports creators who depend on Kit to reach their audiences and earn a living. When it's healthy, nobody notices. That's the job. This is a full-time Individual Contributor role for an experienced infrastructure engineer who likes owning production systems end to end, takes on-call seriously, leans into automation and enjoys making other people's work easier.   YOUR SUPPORT SYSTEM You'll report to Mojtaba Hosseini https://www.linkedin.com/in/mojtaba-hosseini-7a6666/, VP of Engineering at Kit. Day to day, you'll work most closely with Kris Hamoud https://www.linkedin.com/in/kristopher-hamoud-17b34665/ and Ivan Mora Perez https://www.linkedin.com/in/ivan-mora-p%C3%A9rez-ab460b45/. You'll also partner with product engineers across Kit, and with teams outside engineering who rely on infrastructure to get their work done. Once you're ramped up, you'll join a three-person on-call rotation, which works out to roughly one week in three.   WHAT YOU'LL DO - First Week: Get access to our AWS accounts, Kubernetes clusters, monitoring, and CI/CD pipelines. Read through our runbooks and architecture docs. Take part in Get To Know Yous (GTKYs) with Kris, Ivan, and the engineering teams you'll support. - First Month: Pick up day-to-day infrastructure support requests and start working through them with Kris and Ivan as backup. Ship your first improvement, such as a version upgrade or a fix to a gap in monitoring. Shadow on-call shifts. Write down what you learn along the way, especially the parts that only lived in someone's head or those that can be automated or improved. - First Six Months: Own core infrastructure areas end to end: databases, Kubernetes, version upgrades, and platform tooling. Take your full share of on-call, which you'll start by the end of your first quarter. Become the go-to person for day-to-day infrastructure questions. Find one recurring source of pages and make it go away. Ship a first paved path, such as a sandbox environment where AI agents or non-engineers can safely build and test changes. - First Year: You're the primary owner of a large part of Kit's core infrastructure, and you lead projects in it without needing direction. Uptime stays at 99.9% or better, page volume is down, and you've found real cost savings. Your paved paths are in regular use by engineers, non-engineers, and AI agents. You've built observability good enough for AI agents to handle some on-call load. You've documented your decisions so others can build on your work.     WHAT WILL S.E.T. YOU UP FOR SUCCESS   Skills - Running production infrastructure on AWS at scale, including managed relational databases, networking, and load balancing - Operating Kubernetes in production: upgrades, capacity planning, and troubleshooting - Managing infrastructure as code and maintaining CI/CD pipelines that engineers trust - Building monitoring and alerting that catches real problems early and doesn't page people for noise - Diagnosing complex, multi-service incidents calmly, then fixing the underlying cause - Cutting cloud costs through right-sizing and reserved capacity without hurting reliability - Writing clear runbooks, docs, and decision write-ups - Nice to have: experience with Cloudflare, ephemeral or sandbox environments, or email sending infrastructure Experiences - Around 7 or more years in infrastructure, platform, DevOps, or SRE roles - Owning production infrastructure for a product where downtime costs customers money - Carrying a pager for systems you owned, and making that on-call rotation quieter over time - Leading a major upgrade or migration, such as a database or Kubernetes version upgrade, with little or no customer impact - Building self-service tooling or paved paths that other engineers actually adopted - Working on a small infrastructure team where you couldn't hand problems off to a specialist Traits - You own what you run. You spot infrastructure debt and fix it without waiting to be asked, and you follow through until it's done. - You build quality into the work. Upgrades have rollback plans, maintenance windows are planned around customers, and "good enough" is a decision, not a default. - You leverage AI effectively. AI helps you increase quality and velocity where it matters most. You know when to delegate and when to dive in, while holding accountability. - You make work easier for everyone else. You'd rather build a tool or write a guide once than answer the same question ten times. - You teach what you know. You write things down so the next person, or the next AI agent, can build on your work. - You work in public. You share context and tradeoffs openly, including during incidents and when things go wrong. - You use AI thoughtfully. It's part of how you work, and you help others adopt it without creating new risks. - You remember who's on the other end. An outage means a creator's launch email doesn't go out, and that shapes how you prioritize.   WHAT WON'T SET YOU UP FOR SUCCESS - Wanting a well-defined backlog handed to you each week. Here, you'll find much of the work yourself and set priorities with Kris. - Preferring not to be on call. On-call is a core part of this role, shared across a team of three. - You are skeptical of AI’s capabilities, or conversely use AI without good judgement and accountability. - Wanting mostly greenfield architecture. A lot of this work is running, upgrading, and improving systems that already exist. - Needing layers of approval before acting.   WORKING HOURS AND LOCATION We're 100% remote with team members across the globe. We work mostly on East Coast time—so if you're based on the West Coast of the United States, Europe, or Asia, you might have a few early mornings or late evenings. We do our best to keep things reasonable, but a little time zone juggling comes with the territory. This role is part of a three-person on-call rotation, so during your on-call week you'll need to be able to respond to pages outside your usual working hours. We believe PTO should always take priority over on-call. We schedule on-call around people's lives, not the other way around. On-call is a shared responsibility, but taking time off should never be a challenge   COMPENSATION + PERKS + BENEFITS Kit has standardized salaries based on position, no matter where you live. For this role, we're hiring at our level 4 ($197,000). Level is determined based on experience and our interview process.   PERKS + BENEFITS INCLUDE: - Profit Sharing https://www.linkedin.com/feed/update/urn:li:activity:7454911054947688448/ - Kit equity - 401k with a 5% match - We cover up to $2,100 per month toward medical premiums, with dental and vision premiums fully covered. We offer Health Insurance plans through Aetna - $2,000 equipment allowance for your first two years, $1,000 budget every following two years. Company-provided laptops are issued to every Kit team member and are not included in the equipment budget - Individual learning + development budget ($3,500/year) - Creator meetup budget ($50/month) to connect with creators over coffee, lunch, or other in-person meetups - Gender affirming benefits - Childcare benefit up to $3,000 annually through JOON - Twenty (20) days of paid time off during each year of employment - Paid paid vacation: An after-tax bonus of $1,000 for taking five consecutive days of vacation where you’re fully unplugged from work - Ten (10) paid holidays a year - Two weeks of paid sick time each year, including mental health + well being days - Twelve (12) weeks paid parental leave and flexible scheduling in your child’s first year - Up to six weeks of paid bereavement leave, medical leave, and disaster after six months of employment, two weeks of each paid leave in your first six months - Winter Break Closure: Kit closes for a week at the end of December, giving everyone a collective break to enjoy the holiday season. Essential support services remain available, with teams coordinating to ensure coverage during this period - Four-week, paid sabbatical after five years with the team - Fantastic in-person or virtual retreats with the team twice a year   HOW TO APPLY We usually receive a large number of applications, and our goal is to follow up with you within two weeks. You’ll hear from us either way. Here’s what you can expect from the rest of our hiring process: 1. A phone screen with our recruiter (30 min) 2. Hiring manager interview (45 min) 3. Take-home assignment 4. Technical interview (60 min) We’ll keep you informed through every step. To get started, complete this application, including a cover letter and answers to the questions on the next page. We read every single application, and your cover letter and responses help put your experience into context. Kit is an equal opportunity employer We value diversity in all of its forms. Research tells us that applicants who are female or non-binary, as well as applicants who are people of color, are less likely to apply for roles they do not feel 100% qualified for. If you think you meet more than 50% of our requirements but fewer than 100% of them, please apply. We’re imperfect communicators, so think of our job postings as the starting point for discussion rather than proof that you shouldn’t apply. Kit does not discriminate on the basis of race, sex, color, religion, age, national origin, marital status, disability, veteran status, genetic information, sexual orientation, gender identity or any other reason prohibited by law in provision of employment opportunities and benefits.

- Experience in QA for 3+ years. - Strong experience in test analysis and design, including requirements analysis, risk identification, gaps, and edge cases.

• Hands-on experience in software QA, test planning, test case design, and defect reporting. • Ability to execute test scenarios and validate AI outputs against defined requirements.

- Инженер уровня Middle/Senior. - 3+ года коммерческой разработки, Python/Go, Kubernetes.

• От 3 лет опыта. • Обязательный production-опыт с Kubernetes, миграции в Kubernetes.