Location: Remote; Japan (Remote); Slovakia (Remote); Spain (Remote); Czechia (Remote); Switzerland (Remote); Estonia (Remote); Singapore (Remote); Mexico (Remote); USA (Remote); Israel (Remote); Kyrgyzstan (Remote); Bulgaria (Remote); Austria (Remote); India (Remote); Iceland (Remote); Hungary (Remote); Ireland (Remote); Canada (Remote); South Africa (Remote); Brazil (Remote); Finland (Remote); UK (Remote); Romania (Remote); Cyprus (Remote); Malta (Remote); Latvia (Remote); Argentina (Remote); Poland (Remote); Uruguay (Remote)
Workplace: Remote
WHO WE ARE
Hi, we're DuckDuckGo, the online protection company and remote-first team of 400+ on a mission to raise the standard of trust online. Founded in 2008 and profitable since 2014, our annual revenue is in the hundreds of millions USD and millions use our browser on Mac https://spreadprivacy.com/introducing-duckduckgo-for-mac/, Windows https://spreadprivacy.com/windows-browser-open-beta/, iOS https://spreadprivacy.com/duckduckgo-privacy-browser-ios14/, and Android https://spreadprivacy.com/introducing-app-tracking-protection/, our search engine https://duckduckgo.com/, and the DuckDuckGo subscription https://duckduckgo.com/pro. We also offer private, useful, and optional AI, including Duck.ai https://duck.ai/, which lets you chat privately with ChatGPT, Claude, and other AIs, all in one place.
Our culture https://duckduckgo.com/how-we-work of trust, inclusivity, and empowered project management underpins everything we do, where each team member takes full ownership of their projects, from scoping and execution to postmortem. If you're seeking end-to-end ownership of your work, you've come to the right place!
YOUR TEAM AND ROLE
Working on the Privacy Functional Team, you'll lead complex projects across key company-wide objectives. You'll protect the privacy of our users using Go, Node.js, Python, and (sometimes) Perl to write pragmatic, performant, testable code, and work on related projects. Potential projects include:
- Designing systems for improving our search indexes and AI features without compromising user privacy
- Building new features on top of our Tracker Radar https://spreadprivacy.com/duckduckgo-tracker-radar/ crawler to detect emerging privacy threats
- Implementing new privacy features and maintaining existing ones, such as our Web Tracking https://duckduckgo.com/duckduckgo-help-pages/privacy/web-tracking-protections and Email https://duckduckgo.com/duckduckgo-help-pages/email-protection/privacy Protections
As a Senior Privacy Engineer, you'll own major components of our privacy technology, taking responsibility for their maintenance and improvement over time. A key part of the role will also be participation in our privacy review and audit processes, ensuring that all product developments align with our privacy principles. In time, you'll formally mentor other engineers, supporting their career growth and the growth of the Privacy Team at DuckDuckGo.
ABOUT YOU
- Ability to lead and collaborate on high-impact and complex projects from proposal through post-mortem.
- Skills to wrangle vague problems, propose innovative solutions, and execute them effectively, involving others when necessary.
- Experience working on privacy solutions in an engineering capacity (e.g. tracker blocker, differential privacy, or similar technology).
- Deep technical understanding of online privacy threats and the existing solution space to protect against them.
- Proficiency in any of the following: Go, Node.js, Python, Perl.
- Excellent communication skills. You can validate your decisions and communicate them clearly to a variety of audiences, including non-technical stakeholders.
COMPENSATION
$178,500 USD annually and stock options. Compensation is transparent across the organization, and all team members within the same professional level and global region receive the same compensation.
Eligibility for company-sponsored health benefits is limited to team members based in the United States. This program does not extend to team members located in other countries, such as Canada or the UK.
Our Team Member Support Guide https://duckduckgo.com/assets/hiring/team_support_guide.pdf explains how we prioritize your wellbeing including paid parental leave, office setup, and co-working allowances.
HIRING PROCESS
Hiring works best when it's a two-way street. Learn how we help you get to know DuckDuckGo, envision your future role here, and find out more about how we hire https://duckduckgo.com/how-we-hire.
DIVERSITY, EQUITY AND INCLUSION
DuckDuckGo provides equal work opportunities to all team members and applicants, and it prohibits discrimination and harassment of any type on the basis of race, color, ethnicity, caste, religion, age, sex (including pregnancy), national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by our policies or federal, state, or local laws.
We want to ensure that our hiring process is accessible. If you need reasonable accommodation for any part of the application process because of a medical condition or disability, please send an email to careers@duckduckgo.com to let us know the nature of your request.
PLEASE NOTE THAT:
- You’ll be required to attend meetings on camera via video conferencing
- Expect to travel at least two times a year: once for our all-hands meetup and again for a team retreat (each around 4-5 days). While extenuating circumstances may impact attendance, everyone is strongly encouraged to attend.
- While we offer a flexible work arrangement with no core hours, expect an average full-time commitment of 40 hours per week.
- A successful candidate must pass a background check as a condition of joining the team.
- By applying for this role, you confirm that all information submitted is accurate and complete. You further acknowledge that providing false or fraudulent information during the application process is cause for denial of an offer, revocation of any existing offer, or other adverse action, up to and including termination after the start of your commencement of work.
Disclosure Statement: Use of AI in Hiring Process
As part of our commitment to enhancing our recruitment process, we utilize artificial intelligence (AI) technology to assist in reviewing and summarizing job applications and test projects, including those tools integrated into our recruitment vendor platforms. We use AI to flag potentially fraudulent applications, analyze and summarize applicants’ experience, interviews, and project performance, and help streamline our selection process.
Key Principles:
- Data Privacy: All information provided in your application will be handled in accordance with our Recruiting Privacy Policy https://duckduckgo.com/static-assets/files/pages/careers/DuckDuckGo-Recruiting-Privacy-Policy-effective-September-30-2025.pdf. We ensure that your personal information is protected and used solely for recruitment purposes.
- Human Oversight and Accountability: The AI technology is designed to support our hiring team by providing insights and summaries of applications and evaluations of test projects against scoring rubrics. All final evaluations and hiring decisions, however, will be made by our hiring team, who will consider the AI's input alongside other factors.
- Transparency: We believe in transparency regarding our hiring practices. If you have any questions about how AI is used in our recruitment process, please feel free to reach out to us.
By submitting your application, you acknowledge and consent to the use of AI technology in our review process. If you would like to request an alternative selection process, please contact us as at careers@duckduckgo.com. Thank you for your interest in joining DuckDuckGo!
#LI-DNI
УдалённоseniorRemote; Japan (Remote); Slovakia (Remote); Spain (Remote); Czechia (Remote); Switzerland (Remote); Estonia (Remote); Singapore (Remote); Mexico (Remote); USA (Remote); Israel (Remote); Kyrgyzstan (Remote); Bulgaria (Remote); Austria (Remote); India (Remote); Iceland (Remote); Hungary (Remote); Ireland (Remote); Canada (Remote); South Africa (Remote); Brazil (Remote); Finland (Remote); UK (Remote); Romania (Remote); Cyprus (Remote); Malta (Remote); Latvia (Remote); Argentina (Remote); Poland (Remote); Uruguay (Remote)
☁️ Strong AWS experience: 3+ years designing cloud-native architectures on it. 🔧 6+ years architecting and running CI/CD (Jenkins, GitLab, GitHub Actions, Argo CD).
Looking for an engineer who has hands-on experience building AI agents that actually execute workflows, not just chat interfaces. You’ll work on agents that connect to APIs and internal systems, use tools, retrieve context, make decisions across multiple steps, and recover when something fails.
Location: (EU)
We are the creators of a new fintech era!
Our mission is to revolutionize the world by making blockchain technology accessible to everyone in everyday life. WhiteBIT is a global team of more than 1,500 professionals united by a shared vision of shaping the future.
We are building our own blockchain ecosystem to ensure maximum transparency and security for over 8 million users worldwide. Our cutting-edge solutions, rapid adaptation to market challenges, and technological excellence set us apart from traditional companies.
Our official partners include Juventus, FC Barcelona, Lifecell, FACEIT, and VISA.
Join us as an Network Engineer / IT System Administrator.
Requirements
:
Experience & Technical Skills:
Experience:
3+ years in a Network Engineer or IT Systems Administrator role.
Networking Equipment (Must-have):
Hands-on experience configuring and administering Juniper, Fortinet, and Cisco hardware (routers, switches, firewalls, and wireless APs).
Network Security & Protocols:
Strong proficiency in Fortinet NGFW, VPNs (IPsec/SSL), BGP/OSPF, VLAN segmentation, and traffic engineering.
AAA & 802.1X:
Practical experience deploying and managing RADIUS (FreeRADIUS, Cisco ISE, or FortiAuthenticator) and 802.1X network access control.
SaaS & Automation:
IT Services & SaaS:
Proven background managing corporate SaaS environments and identity lifecycle (Google Workspace, Atlassian Suite, Slack, SSO/IdP).
Scripting & Automation:
Hands-on scripting skills (Bash, Python, or PowerShell) and experience using APIs / Webhooks for workflow automation (Jira, Slack, CRM integrations).
Language Requirements:
Ukrainian and/or Russian:
Native or Fluent (C1–C2).
Mandatory requirement driven by the need for instant, barrier-free communication during high-severity incidents to minimize MTTR and strictly maintain core SLAs.
English:
Intermediate (B1–B2) for technical documentation, vendor communication, and raising support cases (e.g., TAC).
Nice-to-Have:
Vendor certifications such as CCNA/CCNP, JNCIA, or Fortinet NSE 4/5.
Responsibilities
:
Network Equipment & Perimeter:
Configure, manage, and harden multi-vendor network infrastructure across Juniper, Fortinet, and Cisco (routers, switches, APs, and Fortinet NGFWs).
Access Control & AAA:
Administer network authentication systems using RADIUS (FreeRADIUS, Cisco ISE, FortiAuthenticator) and 802.1X for corporate wired and wireless networks.
SaaS & IT Services:
Manage user identities, access permissions, and system health across core corporate platforms (Google Workspace, Atlassian Suite, Slack, SSO/IdP).
Workflow Automation:
Build and maintain automation scripts (Bash, Python, or PowerShell) and API integrations connecting internal services (Jira, Slack, CRM).
Incident Management & SLAs:
Act as Tier 3 escalation support for network and SaaS service outages, ensuring fast MTTR and high availability SLAs.
Routing, VPNs & Monitoring:
Maintain site-to-site IPsec/SSL VPNs, core routing (BGP/OSPF), and observability tools (Zabbix, Syslog, SNMP) to catch anomalies proactively.
Working terms
Immerse yourself in Crypto & Web3:
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.
22 business days of paid leave.
Additional days off for national holidays.
Health insurance.
We are looking for an experienced Data Engineer to join a project focused on data engineering, pipeline development, and migration within a cloud-based environment. - Solid professional background in Data Engineering.
Проект: Специалист привлекается для поддержки AI-команды (RnD AI Team), которая реализует портфель ИИ-инициатив для бизнес-подразделений компании на внутренней платформе Dify (LLM-агенты, RAG, классификация, извлечение данных из документов, интеграции через API/MCP). Подготовка тест-кейсов на основании требований и критериев приемки инициатив;
Looking for an engineer who has hands-on experience building AI agents that actually execute workflows, not just chat interfaces. You’ll work on agents that connect to APIs and internal systems, use tools, retrieve context, make decisions across multiple steps, and recover when something fails.
Location: Canada
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're looking for a Staff Engineer to own the smart wallet and account abstraction layer of Xsolla's Web3 platform. This is an individual contributor role with outsized technical scope: you'll be the technical anchor for how millions of players get an on-chain account they never have to think about — setting direction, making hard architectural calls, and raising the bar across the org.
Concretely, you'll own the account model behind Xsolla ZK, our zkSync-based L2, and the wallet that sits inside Xsolla App. Every player who signs in with Xsolla ID receives a deterministic, non-custodial smart account — derived from their identity claim, identical on every device, with private keys that never leave the client. That account is not a separate "wallet" screen: it is the player's inventory, and it backs minting, gifting, trading on our Bazaar marketplace, Merkle-based reward airdrops, gas sponsorship, and an in-app dApp browser that exposes the same signer to third-party applications through an EIP-1193 provider. You'll own the primitives underneath all of it: the ERC-4337 user operation lifecycle, EIP-7702 delegation, session keys and origin-bound Smart Sessions, paymaster and gas abstraction strategy, and the custody and recovery roadmap — including the move from raw key export to MPC custody.
You will own the strategy behind account abstraction, signing, and session management at scale, and evolve our smart account and permissioning model to meet both product and compliance needs. You operate with significant autonomy, but your decisions ripple across teams — so you'll spend real time building buy-in with engineering, product, security, and legal stakeholders, not just designing in isolation.
You are technically deep, calm under pressure, and comfortable being the escalation point when production wallet issues get hard — because in this domain, "hard" means a stuck user operation, a drained paymaster, or a signing prompt a player didn't understand. You write the RFCs and design docs that people actually read, and you create leverage for the broader engineering org through documentation, tooling, and mentorship — without needing a management title to do it.
Responsibilities
Own Smart Wallet & AA Architecture
— Own the technical strategy and architecture of our smart wallet platform, covering the account model, signing, session management, and gas abstraction at scale.
Design the Account & Signing Model
— Design and evolve our ERC-4337 user operation lifecycle (prepare → sign → submit → confirm), EIP-7702 delegation, deterministic address derivation from identity, and the session-key and permission primitives that let players act without a prompt on every transaction.
Own Gas Abstraction
— 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.
Harden the dApp-Facing Surface
— Own the security model where our signer meets third-party applications: EIP-1193 / EIP-6963 provider behavior, origin-bound and policy-versioned sessions, trust tiers, and the transaction and signature confirmation flow. Define what a player is actually approving, and make sure the UI can prove it.
Drive Custody & Recovery
— Lead the custody roadmap from today's interim mechanisms toward MPC-based custody, and design recovery paths (passkeys, guardians, social recovery) that a non-crypto-native player can complete without losing assets.
Drive Cross-Team Technical Decisions
— Drive decisions on account architecture, SDK contracts, data modeling, and platform reliability, and build buy-in across the wallet, marketplace, SDK, mobile, and security teams.
De-Risk Proactively
— Identify systemic risks — key management, signature phishing, reorgs and indexer staleness, bundler and RPC dependencies, contract upgrade paths — and lead initiatives to resolve them before they become incidents.
Set Engineering Standards
— Define engineering standards, review critical code, contracts, and designs, and create leverage for the team through documentation, tooling, and mentorship.
Align with Stakeholders
— Collaborate with product, security, legal, and infra teams to align on roadmap and translate business and regulatory needs into well-scoped technical plans.
Own Production Escalations
— Serve as the go-to escalation point for complex production issues in the wallet and account abstraction domain.
What You Bring
Account Abstraction & Smart Wallets
ERC-4337 Depth
— Deep, hands-on understanding of ERC-4337: 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, and signature validation for undeployed accounts (ERC-6492).
EIP-7702 & the Post-Pectra Landscape
— Working knowledge of EOA delegation, its interaction with ERC-4337 EntryPoint v0.8, and the trade-offs and risks it introduces (residual key authority, delegation phishing, storage collisions).
Smart Account Implementations
— Experience building on or extending production smart account implementations (Safe, Kernel, Biconomy, Coinbase Smart Wallet, or equivalent), and familiarity with modular account standards (ERC-7579 / ERC-6900).
Session Keys & Delegated Permissions
— Experience designing scoped, time-limited, policy-bound authority: session keys with TTL and contract allowlists, origin binding, permission revocation, and delegated-permission standards (ERC-7710 / ERC-7715).
Signature Schemes & Wallet Interfaces
— Practical command of EIP-712 typed data, ERC-1271 contract signatures, WebAuthn / passkey (P-256) signers, and the wallet-facing standards: EIP-1193, EIP-6963, EIP-5792 batched calls, ERC-7677 paymaster interfaces.
Production Wallet Experience
— Experience designing or operating a production smart wallet or account abstraction system serving real users and real value.
Production Crypto Track Record
Scale in a Major Crypto Organization
— Substantial engineering experience at a large crypto product or protocol organization — for example Coinbase, Kraken, Base, Safe, the Ethereum Foundation, Consensys / MetaMask — or a comparable wallet, exchange, or account-abstraction infrastructure team where wallet correctness and custody were core to the product.
Operational Judgment Under Value at Risk
— You have shipped and operated systems where a bug meant lost funds, and you can talk concretely about the guardrails, reviews, and rollback paths you put in place.
Smart Contracts & EVM
Solidity & EVM Fluency
— Ability to read, review, and write account, paymaster, and module contracts; gas-aware design; upgradeability and migration patterns; working effectively with external auditors.
L2 Specifics
— Understanding of L2 execution differences and how they affect wallet design: native account abstraction on zkSync-family chains, transaction and fee models, finality and reorg behavior, and RPC and indexer semantics.
Backend Engineering
Go Engineering
— Strong Go (Golang) engineering skills: idiomatic code, concurrency patterns, performance profiling.
TypeScript & SDK Design
— Ability to design and own client-side SDK surfaces in TypeScript that other engineering teams — internal and external — build on top of.
Distributed Systems
— Experience with distributed systems and their trade-offs (consistency, availability, failure modes), and with reconciling off-chain state against an authoritative on-chain result.
Data & Infrastructure
PostgreSQL
— Schema design, query optimization, migrations at scale.
Kubernetes
— Deploying, operating, and debugging services in a k8s environment.
Message Streaming
— Kafka or NATS — event-driven patterns, consumer groups, at-least-once delivery.
Git & CI/CD
— Git and modern CI/CD practices.
Security
Key Management
— Hands-on experience with key material in production: platform secure storage (Keychain / Keystore), HSMs, MPC or threshold signing, and the operational discipline around each.
Wallet Threat Modeling
— Solid grasp of the wallet attack surface: signature and delegation phishing, malicious dApp origins, replay and cross-chain replay, token approval abuse, and paymaster griefing and DoS.
Leadership
Cross-Team Initiative Leadership
— Proven ability to lead multi-quarter technical initiatives across teams.
Architectural Influence
— Track record of influencing architecture and standards beyond your immediate team.
Written & Verbal Communication
— You write RFCs and design docs that people actually read.
Nice to Have
Experience working in the video game industry, building or operating platforms for game developers, publishers, or players
Hands-on experience with the zkSync / Elastic Chain ecosystem (ZKsync OS, Matter Labs stack, native AA and paymaster flows, custom L2 operations)
Experience with embedded and ecosystem wallet providers or AA infrastructure vendors (thirdweb, Privy, Dynamic, Turnkey, Pimlico, Alchemy, Biconomy, ZeroDev, Safe{Core}) — and clear views on where to build versus buy
Experience with MPC / threshold custody, social recovery, or guardian-based recovery in a consumer product
Experience with 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 authorship or review of ERC / EIP standards
Familiarity with compliance requirements relevant to crypto consumer products: KYC / AML, geofencing, MiCA, SOC 2, ISO 27001, GDPR data minimization, audit logging
Experience with identity and auth integration for wallet derivation (OAuth 2.0 / OIDC, JWT verification, token scoping)
Background in platform or infrastructure engineering — building systems other engineers build on top of
Experience owning a mobile wallet surface (React Native / Expo, WebView provider injection, native signing UI)
Hands-on, up-to-date experience with modern AI tools (e.g. Claude, Copilot, Cursor) for code generation, review, and accelerating day-to-day engineering work
How We Work
Xsolla operates across multiple time zones, and the smart wallet underpins identity, ownership, and value transfer for every Web3 product we ship. Strong written communication is essential — your architectural decisions and designs need to stand on their own and be actionable without you in the room.
We value directness, technical depth, and follow-through. In this domain that means saying plainly when a design has custody, security, or reversibility implications, defending your position with evidence, and staying engaged until it's resolved. Where a decision touches player funds or key material, we expect the conservative call to be argued for explicitly rather than assumed.
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.
Andersen Lab ☀️ is hiring a 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐐𝐀 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 for a project developing an integration layer and ensuring reliable data exchange and seamless communication across multiple systems. - Experience in full-stack QA for 3+ years, covering both manual testing and Java-based test automation.
Требования:
— Диплом в области электронной или электротехнической инженерии либо в смежной области.
— Опыт работы не менее шести месяцев в полупроводниковой отрасли, связанный с проектированием силиконовой упаковки или печатных плат (PCB).
Требования:
— Высшее образование в области машиностроения, электротехники, электроники или аналогичной области.
— Приглашаются как выпускники без опыта, так и с опытом работы.
География найма не уточнена
(EU)
УдалённоCanada; Xsolla operates across multiple time zones, and the smart wallet underpins identity, ownership, and value transfer for every Web3 product we ship
Все вакансии в одном месте - страница 77 · Job Hunters
