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About Supabase Supabase is the Postgres development platform, built by developers for developers. We provide a complete backend solution, including Database, Auth, Storage, Edge Functions, Realtime, and Vector Search. All services are deeply integrated and designed for growth. About the team Management API, written in TypeScript, Nest.js and other JavaScript technologies, is a central part of every product in the Supabase stack. It allows all Supabase services and Supabase Studio to communicate with each other, programmatically manage your own Supabase projects and organisations, as well as integrate with 3rd party services like Vercel, Resend, or Lovable. You will: — Design, implement, and maintain both internal and public-facing APIs used across various Supabase products, including Studio, CLI, management APIs, and OAuth applications. — Integrate with third-party platforms and partners, either by developing custom integrations or providing clear API points for them to connect with Supabase. — Collaborate closely with various teams across Supabase (DevOps, Frontend, etc.) to ensure smooth integration and implementation of API functionality for the rest of the platform. — Build and enhance testing, debugging, and monitoring tools to ensure public APIs' stability, reliability, and performance. — Work with the dev-workflows team to enhance and improve the Branching experience, making it easier and more valuable for Supabase users. You have: — 5+ years of experience in backend API development, with strong expertise in TypeScript and JavaScript (Node.js) and familiarity with modern tools and frameworks (e.g., Nest.js, Express, Vitest, Zod). — Expertise in designing robust, scalable, and maintainable APIs, and experience with API versioning, pagination, and error handling best practices. — Experience with OAuth, JWT, and API security best practices (rate limiting, CORS, etc.) is a plus. — Good understanding of PostgreSQL and relational databases. — Proven ability to build scalable, maintainable APIs and develop tools for testing, debugging, and monitoring API performance. — Understanding of CI/CD pipelines, Docker, and containerized deployments to streamline API development, testing, and release processes. What We Offer — Fully Remote: We hire globally. We believe you can do your best work from anywhere. There are no Supabase offices, but we provide a WeWork membership or co-working allowance you can use anywhere in the world. — ESOP: Every team member receives ESOP (equity ownership) in the company. — Tech Allowance: Use this budget to set up your ideal work environment—laptop, monitor, headphones, or whatever helps you do your best work. — Health Benefits: Supabase covers 100% of health insurance for employees and 80% for dependents, wherever you are. — Annual Off-Sites: Once a year, the entire company gathers in a new city for a week of connection, collaboration, and fun. — Flexible Work: We operate asynchronously and trust you to manage your own time. — Professional Development: Every team member receives an annual education allowance to spend on learning—courses, books, conferences, or anything that supports your growth. About the Team Supabase was born-remote and open-source-first. We believe our globally distributed team is our secret weapon in building tools developers love. 280+ team members, 55+ countries, 20+ languages spoken, $500M raised, 500,000+ community members. We move fast, build in public, and use what we ship. We believe deeply in the open-source ecosystem and strive to support—not replace—existing tools and communities. Hiring Process We keep things simple, async-friendly, and respectful of your time: — Apply – Our team will review your application. — Intro Call – A short video chat to get to know each other. — Interviews – Up to four calls with: Team Leads, Future teammates, Someone cross-functional from product, growth, or engineering (depending on the role), Someone from our leadership/founding team. — Decision – We may follow up with a final question or go straight to offer. All communication is remote and we aim to move fast.

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RELOCATION TO LONDON OR BARCELONA | PERK Company Perk is an intelligent platform for travel and spend management, automating manual processes to help businesses reclaim lost productivity. What you will do Design and maintain efficient ELT pipelines using dbt to transform raw data into clean models. Implement best-practice data modeling and software engineering techniques, including CI/CD and testing. Develop comprehensive data quality checks and monitoring scripts to ensure reliability. Collaborate with analysts and business users to optimize data models for specific analytical use cases. Tune SQL queries and data models to improve warehouse performance and reduce latency. Build scalable, compelling data visualizations in Looker for large teams. Requirements 3+ years of experience in a data-focused role such as Analytics Engineer, Data Analyst, or BI Developer. Expert-level proficiency in SQL. Hands-on experience with dbt or similar transformation frameworks. Experience with cloud data warehouses like Snowflake, BigQuery, or Redshift. Solid understanding of dimensional modeling and ETL/ELT principles. Proficiency with Git for version control. Must be based within commuting distance of London or Barcelona. Nice to have Python expertise for automation and orchestration. Experience with semantic layers and orchestration tools like Airflow. Knowledge of modern software engineering practices applied to data. Culture & Benefits IRL-first culture emphasizing connectivity and collaboration. Opportunity to work in a global, diverse environment with teams across 12 offices. Focus on professional growth and impact within a fast-growing SaaS company. Equal opportunity employer committed to diversity and inclusion.

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The Role: As a Senior PHP Developer, you will join a team dedicated to advancing software engineering. You will make key decisions on software processes and use Kubernetes and Terraform on PHP, Go, React & Angular on AWS. Responsibilities include designing and implementing new features/projects, maintaining and refactoring existing web applications such as the company's website, registration forms, Members Area, and internal web services, researching and integrating new web technologies, writing tests that run continuously on the CI server to ensure code quality and maintain high test coverage, and addressing and resolving support tickets for issues within your projects. Main requirements: — BSc/MSc in information technology or relevant degree — At least 3 years of experience in a similar position — Very good knowledge of PHP 8+, MySQL, Redis, Git — Very good understanding of object-oriented programming principles — Experience in creating and consuming web services — Experience with modern PHP frameworks — Experience in writing tests with PHPUnit — Ability to research and adapt new technologies — Strong organisational skills and ability to prioritise — Problem solving and analytical skills — Ability to work independently and integrate well within a team Advantages: — Experience in Symfony framework — Experience in development of REST APIs — Experience in software development practices like design patterns, SOLID principles, DRY — Very good understanding of security practices (OWASP) — Experience with cloud providers (e.g. AWS) — Experience in database query optimization — Experience in creating composer packages Benefits: — Attractive remuneration package — Intellectually stimulating work environment — Continuous personal development and international training opportunities Hiring process: — Online Technical Challenge — Intro Chat with Talent Acquisition — Role-Specific Take-Home Task — Final Interview

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Location: On-site in London (Visa sponsorship and relocation available). Company: Seamflow is a venture-backed startup building systems to accelerate manual processes in physical industries like aerospace, healthcare, and energy. What you will do: — Design and build end-to-end mobile workflows from UI to local state and sync logic. — Work directly with customers in the field to understand and translate real-world processes into software. — Integrate AI-powered features, including LLMs and model-backed APIs, into mobile workflows. — Develop and maintain production-grade cross-platform apps for iOS and Android. — Own the entire product cycle from customer calls and spec writing to deployment. Requirements: — Strong experience with TypeScript and React Native. — Proficiency in native mobile fundamentals (Swift/Kotlin) for modules like sensors and background tasks. — Experience shipping and maintaining apps via App Store and Google Play. — Ability to design for unreliable connectivity, including offline persistence and conflict resolution. — Experience integrating AI systems (LLMs, agents) into production products. — Must be based in or be able to relocate to London. Nice to have: — Founder or ex-founder experience. — Background in early-stage or stealth startups (e.g., YC, EF, Antler). — Experience as a forward-deployed or solutions engineer. — Proficiency in Python for backend service development. Culture & Benefits: — High-ownership, high-trust environment with a world-class team from X, Google, and Amazon. — Full relocation and visa sponsorship support. — Provision of meals and professional tools. — Fast-paced, in-person culture in London.

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About YouHodler YouHodler is a Swiss-based international fintech platform operating across European and LATAM markets. We build financial products at the intersection of digital assets, payments, and modern financial services, helping customers and businesses access reliable payment solutions, multi-currency accounts, and financial tools that support both retail and B2B use cases. As we expand our footprint, we are looking for a PR Director to elevate our public presence and build a best-in-class global communications function. Who We’re Looking For A senior PR leader with a strong background in fintech, payments, SaaS, enterprise, and B2B communications — someone who: - Has successfully built or scaled PR for payment or financial technology companies in Europe (mandatory). - Understands the European regulatory and media landscape for fintech and payments. - Can create a measurable, business-driven PR strategy. - Maintains a strong personal network with journalists and editors in top-tier business, finance, tech, and payments media. - Knows how to build corporate reputation through earned media, thought leadership, and social platforms. - Works effectively with cross-functional teams — marketing, product, payments, legal, partnerships, and executive leadership. - LATAM media experience is a strong plus Key Responsibilities PR & Communications Strategy - Build and execute YouHodler’s PR strategy with a primary focus on Europe. - Position YouHodler as an innovative, secure, and reliable provider of payment and financial solutions. - Create communication roadmaps for product launches, new features, market expansion, and partnerships in payments and financial services. Media Relations - Maintain and expand strong relationships with journalists across European business, tech, finance, and payments media. - Ensure consistent visibility through interviews, op-eds, press releases, and expert commentary. - Manage all incoming media requests and proactively drive new stories and pitches. Social Media & Thought Leadership - Build a cohesive social media communication framework for YouHodler’s corporate channels. - Strengthen thought leadership of the CEO and internal experts in payments, fintech innovation, financial inclusion, and digital finance. - Develop messaging frameworks and tone of voice aligned with marketing and brand. Reputation Management - Shape company narrative on key topics: payments innovation, security, compliance, consumer protection, and financial reliability. - Prepare Q&A documents, crisis communications, and media training for top management. - Monitor brand mentions, sentiment, and competitive visibility across Europe and LATAM. PR Analytics & KPIs - Define and track PR KPIs: reach, SOV, publication volume, sentiment, link quality, traffic impact. - Prepare transparent reports for C-level leadership. - Demonstrate measurable contribution of PR to broader marketing and business objectives. Requirements Must-Have - 5+ years in PR/Communications at manager or director level. - Strong experience in fintech, payments, SaaS, enterprise or B2B industries. - Proven European PR experience (essential). - Established network in EU tech, finance, business, and payments media. - Proven ability to design and deliver measurable PR strategies. - Ability to work full-time on-site in Lausanne. - Native or full-professional working proficiency in English + French / Italian / Spanish. Nice-to-Have - LATAM experience with financial, tech or payments media. - Experience in corporate social media, SEO-driven PR, LinkedIn thought leadership, or industry events. What We Offer - On-site role in our Lausanne HQ, working closely with leadership teams. - High autonomy and direct influence on global communication strategy. - A fast-growing fintech environment with strong innovation in payments and financial services. - Opportunity to build and scale a PR function of international standard from the ground up. - Caring, collaborative culture and real ownership. Additional Benefits - Competitive Compensation - Salaries complemented by a bonus tied to corporate and personal performance. - Relocation Options - Invitation, official residence permit and other necessary requirements. - Offline meetups - All-team retreat twice annually. - Professional Growth - Growth in FinTech & banking, online-trading, blockchain. - Work from Anywhere - Remote work as a core capability. - Flexible Vacation - 6 weeks of vacation time.

About the company At Adapty, we make it easy for mobile apps to manage in-app purchases and paywalls. We power 20K apps, process $2B in subscriptions every year, and have been growing fast for the last four years. Our mission is simple: help every app unlock its full revenue potential. We are a team of 200+ passionate, product-driven people who love solving big challenges. Backed by top investors like 500 Startups and Surface Ventures, we are building one of the fastest-growing mobile SaaS companies and aiming to become number one worldwide. Senior User Acquisition Manager We are seeking a User Acquisition Manager (Middle) to develop and execute user acquisition strategies, promote mobile apps, and lead a creative team. In this role, you will build meaningful relationships with customers while driving measurable success. What You Will Do — Manage the full lifecycle of advertising campaigns, including creative development, launch, and optimization. — Drive traffic acquisition through platforms like Apple Search Ads, Google Ads, and Facebook. — Develop and test hypotheses to uncover growth opportunities for improving advertising campaign performance. — Analyze the efficiency of campaigns and target audiences to enhance results. — Oversee budgets and track performance to meet advertising objectives. — Interact with clients and participate in pre-sale calls to build strong relationships. — Design and optimize acquisition funnels by analyzing user behavior, spotting growth opportunities, and scaling proven strategies. — Experiment with innovative formats – work closely with the creative team to brainstorm ideas, test various ad formats, and boost campaign effectiveness. What We Expect Experience: — At least 3 years in user acquisition for mobile apps with proven success in scaling efforts. Technical Expertise: — Manage traffic across major platforms — launch and optimize ad campaigns on Meta, TikTok and Google, working with large budgets and ambitious performance goals; — You have experience with web subscription user acquisition. Budget Management: — Experience managing advertising budgets starting at $100,000 per month. Analytical Skills: — Advanced proficiency in Google Sheets AppsFlyer, Power BI/Tableau, Amplitude with strong data analysis capabilities. Soft Skills: — Fluency in English and the ability to communicate effectively with clients and teammates. It’d Be Great If — You have a proven track record of building user acquisition processes for apps from scratch. What’s in it for you — Impact at scale: your work touches thousands of apps and billions in annual revenue. — Fast-moving product team: small, high-trust team, direct feedback, no bureaucracy. — Career growth: experiment with AI, lead initiatives, and grow into a senior PM role. — Flexible remote work: contribute from anywhere. — Perks: English lessons, sports reimbursements, laptop coverage, and more.

Задачи: — Разработка и поддержка одностраничных приложений (SPA) с использованием React (версии 18/19) и TypeScript. — Создание масштабируемых и переиспользуемых UI-компонентов с управлением состоянием (MobX, Redux, Zustand, Context API). — Интеграция с RESTful API, оптимизация производительности приложений, рендеринга и размера бандла. — Обеспечение адаптивного дизайна, доступности (WCAG, ARIA) и кроссбраузерной совместимости. — Написание тестов с использованием Jest и React Testing Library, настройка CI/CD пайплайнов. — Взаимодействие с командами backend, дизайна и QA, участие в код-ревью. Требования: — Опыт коммерческой разработки с React не менее 3 лет. — Глубокие знания TypeScript и современного JavaScript (ES6+). — Понимание React: хуки, функциональные компоненты, кастомные хуки, порталы. — Практический опыт работы с управлением состоянием (MobX, Redux, Zustand или Context API). — Знание HTML5, CSS3 и современных технологий стилизации (Tailwind CSS, SCSS/SASS, CSS Modules). — Опыт интеграции с REST API (Axios, Fetch) и обработки ошибок. — Знакомство с инструментами сборки React (Vite, Webpack), Git и основами CI/CD. — Опыт работы с UI-библиотеками (MUI, Ant Design, Chakra UI) и тестовыми фреймворками. — Понимание вопросов безопасности фронтенда (XSS, CSP) и контейнеризированного деплоя (Docker). — Хорошие навыки решения проблем и внимание к UI/UX. — Владение английским языком на уровне B2 и выше (письменно и устно). Желательно: — Опыт с Next.js (SSR/SSG), React Server Components или React Native. — Знание GraphQL (Apollo Client), WebSocket или архитектуры FSD. — Знакомство с инструментами монорепозиториев (Nx, Turborepo), Storybook или PWA. — Знание backend-технологий (Node.js, NestJS) для полного стека. — Опыт с end-to-end тестированием (Cypress, Playwright). — Участие в open-source проектах. Локация: удалённо, по всему миру. Ограничения: кандидаты из Египта, Индии, Пакистана, Армении и Афганистана не рассматриваются. Формат работы: полный рабочий день, аутсорс, аутстафф.

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Задачи: — Ведение полного цикла разработки команды аналитиков и дата-инженеров — Сбор, анализ и формализация требований внутренних заказчиков — Управление сроками, рисками и устранение блокеров — Оптимизация процессов и мониторинг мотивации в команде — Помощь руководителям в управлении перформансом и постановке целей Требования: — Навыки управления кросс-функциональными командами в разработке от 5+ лет — Реальный опыт ведения AI/ML-проектов (LLM/RAG/агенты или классический ML/DS) — Техническая грамотность для диалога с разработчиками и дата-инженерами — Опыт организации полного цикла разработки: бэклог, сроки и риски — Навыки фасилитации командных встреч (Scrum, Kanban, ретроспективы) — Способность самостоятельно принимать решения и соблюдать сроки — Умение декомпозировать задачи в условиях неопределённости Плюсом: — Инженерный бэкграунд (разработка, дата-инженерия, system design) — Знание SQL — Опыт с LLM — Опыт в iGaming Условия: — Стабильная зарплата в EUR по ТК Кипра — Годовой бонус (13‑ая зарплата) — Корпоративное питание в офисе — Тимбилдинги и корпоративные мероприятия — Компенсация спорта и языковых курсов — Возможность релокации через 3 месяца — Оплата обучения и повышения квалификации — Прямое участие в стратегическом развитии компании — Чёткие процессы и профессиональный рост

3 200 – 4 400 €

Задачи: - Проектировать и писать ядро платформы, доводить его до надежной работы в продакшене - Разрабатывать сервисы и программные компоненты - Внедрять новые функции и развивать существующие - Участвовать в архитектурных обсуждениях и принятии решений - Обеспечивать качество кода: писать и поддерживать юнит-тесты, проводить код-ревью - Участвовать в оценке, планировании и приоритизации разработки - Развивать младших и миддл-разработчиков в отделе - Общаться с заказчиками и командами разработки, тестирования, сопровождения Требования: - Опыт разработки на Python: знакомство с Asyncio, Concurrency, FastAPI, Flask, Django, Testing и особенностями масштабирования Python-приложений - Опыт работы с базами данных — SQL Syntax, Indices, Transactions, Locks, Domain Design, Scaling Patterns, NoSQL, популярными ORM, например SQLAlchemy - Опыт создания продуктов и инструментов в области AI и LLM: построение агентов и систем RAG, работа с MCP, реализация механизмов памяти и кодинговых агентов

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Задачи: — Ведение полного цикла разработки команды аналитиков и дата-инженеров — Сбор, анализ и формализация требований внутренних заказчиков — Управление сроками, рисками и устранение блокеров — Оптимизация процессов и мониторинг мотивации в команде — Помощь руководителям в управлении перформансом и постановке целей Требования: — Навыки управления кросс-функциональными командами в разработке от 5+ лет — Реальный опыт ведения AI/ML-проектов (LLM/RAG/агенты или классический ML/DS) — Техническая грамотность для диалога с разработчиками и дата-инженерами — Опыт организации полного цикла разработки: бэклог, сроки и риски — Навыки фасилитации командных встреч (Scrum, Kanban, ретроспективы) — Способность самостоятельно принимать решения и соблюдать сроки — Умение декомпозировать задачи в условиях неопределённости Плюсом: — Инженерный бэкграунд (разработка, дата-инженерия, system design) — Знание SQL — Опыт с LLM — Опыт в iGaming Условия: — Стабильная зарплата в EUR по ТК Кипра — Годовой бонус (13‑ая зарплата) — Корпоративное питание в офисе — Тимбилдинги и корпоративные мероприятия — Компенсация спорта и языковых курсов — Возможность релокации через 3 месяца — Оплата обучения и повышения квалификации — Прямое участие в стратегическом развитии компании — Чёткие процессы и профессиональный рост

3 200 – 4 400 €

Задачи: — Разрабатывать и поддерживать код — Проводить code review — Использовать современный стек технологий, а также участвовать в его обновлении, исходя из своего опыта — Документировать свой код, покрывать unit-тестами — Оценивать работы по разработке — Взаимодействовать со смежными командами (QA, аналитика, эксплуатация и т.д) Требования: — Опыт работы в роли разработчика Python от 5 лет — Знакомство с Domain Driven Design (DDD) — Применение в разработке Django и Django Rest Framework — Опыт разработки и интеграции RESTful API — Понимание принципов ООП, шаблонов проектирования и лучших практик разработки — Опыт работы с CI/CD и DevOps практиками — Использование брокера сообщений Apache Kafka для обработки потоков данных — Опыт работы с реляционной СУБД PostgreSQL — Работа с чистым SQL из Python Будет преимуществом: — Работа со слоистыми архитектурами — Опыт работы с Command and Query Responsibility Segregation (CQRS) — Знакомство с написанием OpenAPI спецификации — Опыт работы с dependency injection фрэймворками Условия: — Работа над социально значимыми проектами в аккредитованной IT компании — Конкурентная заработная плата + годовой бонус — ДМС + стоматология и международная страховка — Гибкое начало рабочего дня — Гибридный формат работы — Компенсация 9 видов расходов: от КАСКО до путевок на отдых — Интересная программа внутреннего и внешнего обучения — Сильная команда талантливых специалистов

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At Querify Labs, we work with technology companies on the design and implementation of complex data infrastructure systems. Our engineers contribute to projects involving query processing, storage engines, distributed systems, and analytical infrastructure. Our Engineering Approach: Our engineers primarily work with Java and C++, though we are not tied to any specific language or technology stack. We value strong engineering fundamentals and the ability to select the right tools for the problem at hand. We leverage modern AI-assisted development tools to accelerate research, prototyping, implementation, and code exploration. We view AI as a force multiplier for experienced engineers rather than a replacement for engineering judgment, system design, or deep technical expertise. We actively study open-source systems, academic research, and production architectures to make informed engineering decisions. You Will: — Design and implement core system components — Investigate performance bottlenecks and scalability challenges — Analyze open-source projects and research papers — Write technical design documents and validate ideas through prototypes — Participate in architecture discussions and code reviews — Work closely with experienced database and distributed systems engineers You Have: — Strong knowledge of algorithms and data structures — Solid software engineering experience in Java, C++, Rust, or another systems-oriented language — Interest in databases, query processing, storage engines, or distributed systems — Strong analytical and problem-solving skills — Ability to understand complex technical trade-offs and communicate them clearly — Curiosity, ownership, and a desire to learn new technologies Nice to Have: — Experience with databases, query engines, storage engines, or distributed systems — Experience with concurrency, parallel algorithms, or performance optimization — Experience with big data technologies and data processing systems — Contributions to open-source projects — Research publications, conference talks, or technical writing What We Offer: — Competitive compensation based on experience, expertise, and impact — Long-term contractor engagement — Fully remote work from anywhere in the world — Exceptionally challenging technical problems — Opportunities to publish, speak at conferences, and contribute to the technical community

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About the team The Technical Success team ensures safe and effective deployment of ChatGPT and OpenAI API applications for developers and enterprises, acting as trusted advisors to maximize value from models and products. The Ecosystem team builds and scales third-party integrations around ChatGPT and Codex, working across product, engineering, partnerships, safety, legal, policy, and go-to-market to create useful, trustworthy, and technically sound integrations. About the role The Applied Deployment Engineer will build and deepen ChatGPT integrations with third-party messaging platforms, focusing initially on partner work and future opportunities with other messaging apps globally. This hands-on, partner-facing engineering role involves working closely with external product and engineering teams to improve integrations, expand capabilities like image generation, increase retention, and translate partner needs into OpenAI’s product and engineering roadmap. The role requires daily coding, making changes across platform or monorepo surfaces, and balancing technical discovery, product tradeoffs, prototyping, debugging, and executive communication. It suits a product-minded engineer with excellent communication skills, sound technical judgment, and ability to work across cultures, time zones, and organizations. The role is based in the San Francisco office with a hybrid work model (3 days in office per week) and relocation assistance. Responsibilities — Partner with messenger app product and engineering teams to design ChatGPT-powered experiences fitting chat, group, contact, and app-tab surfaces. — Deepen existing partner integrations focusing on user experience, retention, reliability, and features. — Build prototypes, integration guides, reference flows, and launch checklists to help partners move from concept to production. — Debug API, latency, authentication, quota, quality, and user-experience issues across partner and OpenAI systems. — Translate privacy, trust, login, and data-handling requirements into clear technical constraints and implementation plans. — Collaborate with product, engineering, design, partnerships, legal, policy, and support teams to ensure reliable, scalable, and maintainable partner launches. — Capture repeatable patterns from messenger integrations and create reusable playbooks for future partners. — Travel periodically to meet international partners during key integration, launch, and post-launch milestones. Requirements — Strong software engineering background with daily coding enjoyment. — Experience building or deploying API integrations with external partners, understanding client, backend, auth, privacy, reliability, and UX constraints. — Strong product sense and design judgment for consumer-facing experiences. — Ability to concretize ambiguous product ideas without over-specifying partner internals. — Clear communication with engineers, product leaders, executives, and business stakeholders. — Comfortable debugging distributed systems and narrowing performance or reliability issues into actionable hypotheses. — Deep care about user trust, privacy, and product quality, especially in sensitive communication contexts. — Ability to balance urgency with judgment and maintain launch momentum without skipping important details. Preferred qualifications — Experience with B2C consumer, social, or messaging products. — Experience working with international partners or in cross-cultural product and engineering environments. — Familiarity with OAuth/login flows, API rate limits, webviews, mobile release cycles, and partner launch operations. — Experience with AI product launches, developer platforms, or API-first products. — Prior customer-facing or partner-facing engineering experience, especially in startups or smaller companies. — Ability to collaborate across APAC time zones and travel internationally quarterly, sometimes for up to two weeks around major launch milestones. About OpenAI OpenAI is an AI research and deployment company dedicated to ensuring general-purpose AI benefits all humanity, pushing AI capabilities boundaries and safely deploying them through products. The company values diverse perspectives and is an equal opportunity employer, complying with applicable laws and policies regarding background checks and fair chance employment.

About the Role We are looking for a Senior Smart Contract Engineer to help design, build, and launch secure blockchain products with seamless wallet-connected user experiences. You’ll work on smart contract architecture, wallet transaction flows, testing, deployment, and Web3 application integrations across networks such as Ethereum, Arbitrum, Optimism, Base, and Polygon. The role is ideal for an engineer who cares deeply about security, clean architecture, gas efficiency, and building products users can trust. Responsibilities — Design, develop, test, and deploy secure smart contracts for blockchain applications. — Build and maintain wallet integration flows, including wallet connection, transaction signing, network switching, and error handling. — Collaborate with frontend and backend engineers to integrate smart contracts into user-facing products. — Improve smart contract architecture with a focus on security, scalability, maintainability, and gas efficiency. — Write comprehensive unit, integration, and end-to-end tests for smart contracts and wallet workflows. — Support contract deployment, verification, monitoring, and upgrade processes across testnet and mainnet environments. — Participate in code reviews and contribute to engineering best practices. — Work with product and engineering teams to define technical requirements and deliver production-ready blockchain solutions. — Stay current with blockchain protocols, Web3 tooling, wallet standards, and smart contract security practices. Requirements — 5+ years of professional experience as a Smart Contract Engineer, Blockchain Engineer, or similar role. — Strong proficiency in Solidity and EVM-based smart contract development. — Experience with development frameworks such as Hardhat, Foundry, or Truffle. — Experience with wallet integration libraries such as ethers.js, web3.js, wagmi, viem, or similar tools. — Hands-on experience integrating wallets including MetaMask, WalletConnect, Coinbase Wallet, and other EVM-compatible wallets. — Strong understanding of blockchain fundamentals, including gas optimization, transaction lifecycle management, smart contract upgrade patterns, token standards (ERC-20, ERC-721, ERC-1155), and event indexing. — Experience with smart contract testing, auditing processes, and security best practices. — Strong communication skills and ability to collaborate effectively in a remote environment. — Ability to work independently and take ownership of projects from design through deployment. Preferred Qualifications — Experience building DeFi, NFT, staking, DAO, payment, or wallet-related Web3 products. — Experience working with Layer 2 networks such as Arbitrum, Optimism, Base, Polygon, or zkSync. — Familiarity with account abstraction, smart wallets, multi-signature wallets, or gasless transaction systems. — Experience with The Graph, blockchain indexers, or on-chain analytics platforms. — Experience contributing to open-source blockchain projects. — Familiarity with React, Next.js, or other modern frontend frameworks. Benefits — Fully remote work environment — Work from anywhere in the world — Competitive compensation — Flexible working hours — Opportunity to work on innovative blockchain and Web3 products — Collaborative and experienced engineering team

adjoe builds technologies behind mobile apps growth and monetization, leading in rewarded advertising with their product Playtime Arcade, connecting advertisers and publishers with over 770 million users annually. The Cloud Engineering team is responsible for the infrastructure supporting 5.5 billion daily ad requests, ensuring systems stay online, performant, and cost-efficient. They handle 400 million user events daily, traffic spikes of 150,000+ requests per second, and maintain a data lake for data scientists, BI, and real-time ML inference. The team runs Kubernetes with event-driven autoscaling and Karpenter, manages Kafka clusters for real-time streaming, and provisions infrastructure through Terraform. They prefer open-source alternatives over managed AWS services, using tools like Druid, Airflow, Grafana, Prometheus, Spark, Trino, MLFlow, Jupiter Hub, Elasticsearch, and Fluentbit to maintain a cloud-agnostic architecture. Cost efficiency is a key engineering constraint, including AI-based anomaly detection on infrastructure costs. Requirements: — 3+ years in DevOps, SRE, or Platform Engineering. — Experience designing and operating cloud infrastructure at scale. — Hands-on experience deploying and managing containerized applications in Kubernetes. — Experience with Kafka, Druid, Airflow, Spark, Terraform, and Gitlab on Kubernetes clusters. — Strong understanding of AWS services including EKS, DynamoDB, SNS, SQS, IAM, Lambda. — Infrastructure as code expertise with Terraform. — Knowledge of tradeoffs between managed AWS services and open-source alternatives. — Familiarity with microservice event-driven architecture, including topics, queues, and object storage. — Ability to support backend teams building high-performance Go services in distributed environments. — Experience building reliable, fast, predictable, and low-maintenance CI/CD pipelines. — Comfortable migrating workloads to self-hosted solutions and introducing new infrastructure tools. Relocation support to Hamburg, Germany is provided for candidates worldwide ready to join the team. Benefits: — Work on impactful infrastructure reaching hundreds of millions of users and powering billions of decisions daily. — Ownership of projects affecting 770 million users. — Fast-paced environment with multiple daily solution deployments. — Open problem solving and cross-team collaboration. — Diverse global team from over 40 countries. — Positive work culture celebrating wins and daily victories.

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adjoe builds technologies behind mobile apps growth and monetization, leading in rewarded advertising with their product Playtime Arcade, connecting advertisers and publishers with over 770 million users annually. The Cloud Engineering team is responsible for the infrastructure supporting 5.5 billion daily ad requests, ensuring systems stay online, performant, and cost-efficient. They handle 400 million user events daily, traffic spikes of 150,000+ requests per second, and maintain a data lake for data scientists, BI, and real-time ML inference. The team runs Kubernetes with event-driven autoscaling and Karpenter, manages Kafka clusters for real-time streaming, and provisions infrastructure through Terraform. They prefer open-source alternatives over managed AWS services, using tools like Druid, Airflow, Grafana, Prometheus, Spark, Trino, MLFlow, Jupiter Hub, Elasticsearch, and Fluentbit to maintain a cloud-agnostic architecture. Cost efficiency is a key engineering constraint, including AI-based anomaly detection on infrastructure costs. Requirements: — 3+ years in DevOps, SRE, or Platform Engineering. — Experience designing and operating cloud infrastructure at scale. — Hands-on experience deploying and managing containerized applications in Kubernetes. — Experience with Kafka, Druid, Airflow, Spark, Terraform, and Gitlab on Kubernetes clusters. — Strong understanding of AWS services including EKS, DynamoDB, SNS, SQS, IAM, Lambda. — Infrastructure as code expertise with Terraform. — Knowledge of tradeoffs between managed AWS services and open-source alternatives. — Familiarity with microservice event-driven architecture, including topics, queues, and object storage. — Ability to support backend teams building high-performance Go services in distributed environments. — Experience building reliable, fast, predictable, and low-maintenance CI/CD pipelines. — Comfortable migrating workloads to self-hosted solutions and introducing new infrastructure tools. Relocation support to Hamburg, Germany is provided for candidates worldwide ready to join the team. Benefits: — Work on impactful infrastructure reaching hundreds of millions of users and powering billions of decisions daily. — Ownership of projects affecting 770 million users. — Fast-paced environment with multiple daily solution deployments. — Open problem solving and cross-team collaboration. — Diverse global team from over 40 countries. — Positive work culture celebrating wins and daily victories.

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Задачи: — Проектирование архитектур безопасности для облачной инфраструктуры и приложений с применением принципов secure-by-design. — Сотрудничество с командами продукта и архитектуры для внедрения средств контроля безопасности и автоматизации моделирования угроз. — Аудит и проверка реализации мер безопасности в инфраструктурных манифестах и CI/CD пайплайнах. — Контроль безопасности продукта при миграции из дата-центров в публичные облака, такие как AWS. — Консультирование инженерных команд по лучшим практикам безопасности и требованиям нормативного соответствия. Требования: — Возможность релокации из России или Беларуси. — Опыт обеспечения безопасности микросервисов, разработанных на JavaScript и TypeScript. — Владение инструментами CI/CD (GitLab, Jenkins) и Infrastructure-as-Code (Terraform, Helm, CloudFormation). — Практические навыки разработки на Python или Shell. — Глубокое понимание безопасности цепочки поставок, целостности программного обеспечения и безопасной доставки ПО. — Опыт работы с Docker и mesh-технологиями, такими как ISTIO. Будет плюсом: — Опыт проектирования безопасных сервисов на Kubernetes и AWS. — Знание законов о конфиденциальности, таких как GDPR, и отраслевых стандартов PCI, ISO 27001, NIST. — Профессиональные сертификаты в области безопасности (CISSP, CISM, CCSK, CCSP, CEH). Условия: — Медицинская страховка с глобальным покрытием. — 23 рабочих дня отпуска в году плюс оплачиваемый больничный. — Пакет релокации, включающий билеты, проживание в отеле до 2 недель и визовую поддержку для сотрудника и семьи. — Возможности профессионального развития и изучения языков. — Ежегодный пересмотр вознаграждения и регулярные тимбилдинги.

4 000 – 6 500 €

Location: Remote (GMT-8 to GMT+5). 3-4 hours overlap with US Central Time (Chicago/Texas) required. Not open to candidates from China, Australia, or similar time zones. Company Walter is developing open-source technology to advance computational biology through scalable workflow execution engines. What you will do — Contribute to the development of the Sprocket workflow execution engine and associated Rust crates (wdl, sprocket, crankshaft). — Improve and extend the Workflow Description Language (WDL) specification, shepherding changes through the ratification process. — Collaborate on the evolution of the Task Execution Schema (TES) with standards bodies and the open-source community. — Develop and maintain reference implementations with comprehensive OpenAPI/Swagger documentation. — Coordinate progress with the internal computational biology team. Requirements — 6+ years of senior-level proficiency in Rust with a track record of shipping production code. — Experience contributing to or leading open-source projects. — Familiarity with workflow engines, scientific computing, or large-scale computation. — Ability to work with Rust crates for lexing, parsing, validating, linting, and executing DSLs. — Strong skills in API design and specification development. — Proficiency with GitHub for project planning and collaboration. Nice to have — Experience improving specifications using OpenAPI (Swagger) or the utoipa crate. — Familiarity with Workflow Description Language (WDL) and Task Execution Schema (TES). — Experience with Kubernetes, cloud, or HPC environments. — Prior involvement with standards bodies such as GA4GH. Culture & Benefits — Full-time and long-term role commitment. — Opportunity to work on impactful, open-source technology used by scientists worldwide. — Ability to influence the direction of open standards in scientific workflow execution.

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