Вакансии

Responsibilities: — Develop smart contracts and blockchain solutions focusing on Ethereum, EVM-compatible chains including Arbitrum and other Layer 2 networks. — Work on DeFi projects involving AMM logic, decentralized trading and settlement mechanisms, pricing mechanisms, and oracle integrations. — Utilize tools such as Foundry and Hardhat for smart contract development and testing. — Optimize gas usage and ensure security of smart contracts. Bonus skills: — Experience with prediction markets, decentralized exchanges (DEX), smart contract audits. — Frontend experience with React and Web3 integration. — Experience taking blockchain products from prototype to MVP and production. Project: Development of a Web3 trading platform, advancing an early-stage prototype to a fully functional MVP. Requirements: — Minimum 5 years of experience in blockchain development. — Strong proficiency in Solidity and smart contract development. — Knowledge of Ethereum, EVM, Arbitrum or other Layer 2 networks. — Experience with smart contract testing, gas optimization, and security best practices. Conditions: — Remote work worldwide. — Contract employment with initial paid contract and potential for long-term cooperation. — English proficiency at B2+ level. — Only freelancers considered; outsourcing and recruiting companies are not accepted.

— Разработка и поддержка смарт-контрактов и децентрализованных приложений (DApps). — Интеграция блокчейн-технологий в существующие бизнес-процессы.

- Разработка и поддержка высокопроизводительных блокчейн-приложений на языке Rust. - Разработка и оптимизация смарт-контрактов.

- Разработка и поддержка CI/CD-процессов для сборки и доставки блокчейн-приложений. - Настройка, мониторинг и поддержка инфраструктуры в облачных средах (AWS, GCP, Azure).

Задачи: — Интеграция новых блокчейн сетей и токенов — Сопровождение текущего кода — Оптимизация синхронизации блоков и доработка процессинга криптовалюты под задачи бизнеса Требования: — Опыт разработки на Python не менее 5 лет (уровень middle+) — Опыт работы с FastAPI или асинхронным фреймворком — Опыт работы с rpc и abi — Базовые знания криптографии, включая хеширование и ассиметричное шифрование — Понимание принципов работы блокчейна — Умение подписывать транзакции — Понимание принципа работы UTXO — Желание и умение решать сложные задачи Будет плюсом: — Опыт разработки микросервисной архитектуры — Оптимизация кода под высокие нагрузки — Знание английского языка на уровне чтения документации Условия: — Полная занятость, график 5/2 — Удалённый формат работы Контакт для отклика: contact@bitbanker.ru

We are seeking a talented and experienced Blockchain Developer to join our growing technology team in the United States. Design, develop, and maintain blockchain-based applications and decentralized systems.

— Design, develop, and deploy secure smart contracts using Solidity for the Ethereum blockchain ecosystem; — Architect and implement robust decentralized applications (dApps) and backend integration with smart contracts;

- Проводить анализ защищённости приложений, сервисов и смарт-контрактов. - Выполнять Security Code Review, Security Design Review и моделирование угроз.

CoinDesk is looking for a BSA AML Officer and Blockchain Compliance Specialist to lead financial-crime compliance programs and investigate on-chain activity.

Location: Москва Промышленная система доступа к публичных блокчейн сетям с целью хранения, обмена, обременения цифровых активов, выпуска и оборота токенизированных активов (облигации и иные ценные бумаги). Обязанности * внедрение современных требований в области DevOps в производственный процесс * своевременное устранение рисков кибербезопасности и уязвимостей * сопровождение тестового контура и настройка CI/CD * ведение документации (инструкции для потребителей и команды) * участие и совершенствование производственного процесса (автовнедрения, AI-повестка) * конфигурирование и продуктивизация сервисов * настройка мониторинга и дашбордов, для оперативного реагирования на инциденты * масштабирование сервисов и оптимизация нагрузки на них (мониторинг трафика и выставление лимитов или масштабирование) * участие в обязательных мероприятиях (аварийные учения, устранение инцидентов) * участие в проведении демо, ПСИ * работа в agile/scrum методологии, взаимодействие с другими членами команды. Требования ### Требования * опыт работы в роли DevOps от 5 лет * опыт создания и эксплуатации CI/CD конвейеров на основе Docker, k8s (Helm), ansible, Jenkins ( groovy) * уверенное владение командной строкой в unix, работа с сетью (curl) * опыт с GitFlow, sql, openssl, Istio Service Mesh * опыт работы с логами и разбором инцидентов. ### Будет плюсом * опыт с ArgoCD, GitOps * опыт работы или использования приложений для публичных блокчейн сетей * опыт работы с кошельками цифровых валют * знания в области распределенных сетей, кибербезопасности, криптографии (хэш-функции, ЭЦП). ### Условия * возможность выбрать удобный формат работы: гибрид или офис * комфортный современный офис: г. Москва, Оружейный переулок, 41 (БЦ Оружейный) * ежегодный пересмотр зарплаты, годовая премия * корпоративный спортзал и зоны отдыха * более 400 образовательных программ СберУниверситета для профессионального и карьерного развития * расширенный ДМС, льготное страхование для семьи и корпоративная пенсионная программа * ипотека выгоднее до 7% для каждого сотрудника * подписка Прайм с возможностью совместного использования на трёх близких * вознаграждение за рекомендацию друзей в команду Сбера.

⚠️ Important: You must be based in Switzerland, in Zug or able to come to the Zug office. Applications from candidates not in Zug, Switzerland cannot be considered.

— Проектирование, разработка и аудит смарт-контрактов на Solidity для экосистемы Lagrange. — Реализация протоколов взаимодействия между сетями (cross-chain) и систем верификации ZK-доказательств.

Location: Hong Kong, Hong Kong SAR Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About the Opportunity The work of the blockchain parsing team involves structuring on-chain data. This means taking all the raw data from the blockchain and, through business modeling, computation, transformation, and other operations, converting it into the data required by various business applications (such as wallets, explorers, CeFi, etc.). This process involves parsing on-chain data from hundreds of blockchains with different architectures, including EVM, UTXO, Cosmos, Move, and more, as well as scheduling these operations. It also encompasses the management of complete historical data for each blockchain, reaching the scale of petabytes (PB) of data. What You’ll Be Doing Responsible for researching various blockchain architectures and on-chain data parsing. Maintain good communication with the team, provide rational suggestions for requirements, and ensure the development work progresses smoothly as planned; ensure the system meets performance, scalability, and security requirements. Responsible for database design, system design, API interface design, and external system integration. Troubleshoot and resolve issues across the entire pipeline; optimize and improve the availability and capacity of online services, and handle unexpected online issues. Selling point of the team Gain exposure to the latest public blockchain technologies in the industry. Work with and manage the largest volume of on-chain data in the industry, which involves hundreds of blockchains. Our team is a core part of the company’s infrastructure. You’ll gain insight into how complex foundational services are built to support multiple business lines, including wallets, DeFi, CeFi, explorers, and tracking tools. Our approach is innovative and leading in the industry. What We Look For In You Solid foundation in Java, with extensive experience in Java multithreading, concurrency, and network communication, and good coding practices. Familiar with common open-source projects or middleware (at least one or two), with source code experience being a plus, such as Kafka, RocketMQ, GRPC, Dubbo, Redis, MySQL, Elasticsearch (ES), caching mechanisms, Spring/SpringBoot, etc. Proficient in mainstream open-source application frameworks such as SpringBoot, SpringMVC, MyBatis, SpringCloud, etc. Experience in developing and designing large-scale data platforms. Strong learning ability, teamwork, and communication skills; proactive in thinking and capable of independent analysis and problem-solving. Understanding of Web3, public blockchain business, and technology; relevant work experience is a plus. Strong sense of responsibility, ownership mindset, and an exploratory spirit. Perks & Benefits Competitive total compensation package L&D programs and Education subsidy for employees' growth and development Various team building programs and company events Wellness and meal allowances Comprehensive healthcare schemes for employees and dependants More that we love to tell you along the process! Notice: All official OKX vacancies are published on this website. While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website. Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX 's Candidate Privacy Notice .

Location: Kyiv, Ukraine; Lviv, Ukraine New opportunities in Ukraine! 🟢 Dev.Pro is a US-based software development company helping tech companies build their products and grow their business. We’re remote-first, and we work with independent contractors in over 55 countries, so you’d be collaborating in a multicultural environment on some really interesting projects. We invite a Senior QA Engineer to join our team and help evolve a large-scale blockchain-based platform for private markets. In this role, you’ll own end-to-end quality assurance, combining hands-on manual testing with building and expanding test automation across backend services, distributed systems, and blockchain integrations. You'll help establish testing approaches and automation practices from the ground up, working closely with engineering teams and business stakeholders to ensure reliable, high-quality releases. 🟩 What's in it for you: Work on an innovative blockchain platform designed to bring trust and transparency to private markets Deepen your expertise in blockchain systems, distributed architectures, and complex integrations Drive the development of test automation frameworks and help shape quality practices across multiple projects ✅ Is that you? 5+ years in QA/SDET roles, covering both manual and automated testing across the full SDLC Strong experience with backend and non-UI test automation Hands-on experience developing, maintaining, and debugging automated tests Strong programming skills for test automation, preferably with TypeScript/Node.js Ability to define QA strategies, test plans, and quality gates from the ground up Understanding of blockchain fundamentals, including wallets, transactions, and blockchain types Experience testing REST APIs and RPC-based interfaces (JSON-RPC, gRPC) Experience with Docker-based test environments and debugging containerized services Experience integrating automated tests into CI/CD pipelines and establishing quality gates Experience with AWS-based infrastructure Experience with MongoDB or PostgreSQL Strong analytical and problem-solving skills to identify risks and propose solutions Ability to independently manage testing activities, take ownership of deliverables, and proactively communicate progress and blockers Ability to adapt to changing priorities and demonstrate a flexible, hands-on approach to testing Ability to define testing scope and balance test coverage between QA and engineering teams Strong communication and collaboration skills across multiple stakeholders and teams Upper-Intermediate+ English level Desirable: Hands-on experience testing blockchain systems, smart contracts, and transaction flows Experience with Go for test automation EVM testing experience using Foundry, Hardhat, or similar frameworks Ability to read and understand Solidity or Rust code for smart contract validation Experience with Layer 2 solutions and blockchain protocol testing Experience testing asynchronous messaging systems (AWS SNS/SQS, Azure Service Bus) Experience with Kubernetes Experience with observability-driven testing Experience testing MCP servers Experience with performance and load testing 🧩 Key responsibilities and your contribution In this role, you'll lead testing activities across blockchain-based applications, from requirements analysis and manual validation to test automation and release support. Review business requirements and technical documentation to understand system functionality and identify testing needs Manually test new features and existing functionality to understand system behavior and guide test automation efforts Define and improve QA strategies, test plans, and quality gates Establish testing ownership and coordinate responsibilities between QA and engineering teams Work closely with engineering and product teams to define test coverage and acceptance criteria Build and maintain automated test suites, frameworks, and test harnesses, focusing on backend, integration, and contract testing Test blockchain integrations, smart contracts, REST APIs, JSON-RPC endpoints, MCP servers, and other blockchain-specific functionality Integrate and monitor automated tests within CI/CD pipelines and quality gates Investigate and troubleshoot issues across distributed systems and blockchain integrations Adjust testing priorities and approaches as project needs evolve Maintain test documentation, report quality risks, and communicate testing progress and blockers Help expand automation coverage and improve QA practices across multiple projects Our next steps: ✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Interview — ✅ Signing the Contract Interested? Find out more: 📋 How to Join Us 💻 LinkedIn Page 📈 Our website 💻 IG Page By submitting application, I've read and agree to the Dev.Pro Private Policy and Consent on Processing of Personal Data . I agree to have my Personal Data being stored and processed by Dev.Pro.

• Разрабатывать и поддерживать backend-сервисы на Go; • Развивать микросервисную архитектуру и REST/gRPC API;

Location: India Who We Are: Galaxy Digital Inc. (Nasdaq: GLXY) is a global leader in digital assets and data center infrastructure, growing the economy that runs on code. Galaxy delivers the onchain infrastructure that connects institutions to digital assets, including trading, advisory, asset management, staking, self-custody, and tokenization. Galaxy also develops and operates data center infrastructure to power AI and HPC workloads. Anchored by its Helios campus in Texas, Galaxy is building a multi-gigawatt pipeline of more than 5.7 GW of potential capacity, positioning it among the largest and fastest-growing data center developers in North America. The Company is headquartered in New York City, with offices across North America, Europe, the Middle East, and Asia. Additional information about Galaxy's businesses and products is available on www.galaxy.com . What We Value: We are a diverse team of free thinkers, and fast movers united to help investors and creators energize the global economy. We are looking for individuals who thrive in a culture of builders and overachievers and embrace high performance, transparent feedback, and a mission-first approach. Our culture shapes our way of working and gets us where we want to be. Seek Excellence. Be Selective To Be Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Encourage Independent Decision-Making. Build Dream Teams. Who You Are Galaxy is seeking a Senior Blockchain Security Engineer with expertise in securing smart contracts, blockchain protocols, and supporting applications and infrastructure. This is a hands-on individual contributor role based in India, with a strong focus on identifying and mitigating security risks across on-chain systems. The engineer will participate in assessments of blockchain architectures and smart contracts, followed by the facilitation and/or implementation of remediations. The engineer will work closely with Engineering, Product, Protocol, and Infrastructure teams to design and deliver secure software solutions at a rapid growth company. What You Do Participate in secure software design, architecture, threat modeling, and code reviews for blockchain and on-chain systems. Perform security reviews and audits of smart contracts, including Solidity/EVM and Rust/Solana-based applications. Assist teams with the mitigation of findings by assessing impact, proposing solutions, and providing technical guidance for implementation. Assess blockchain-specific risks including smart contract vulnerabilities, protocol design flaws, and transaction security. Develop secure design patterns, reusable security controls, and tooling for blockchain applications and supporting infrastructure. Research emerging blockchain threats and mitigations, and leverage modern security and AI-assisted tooling to improve vulnerability discovery and code review. What We're Looking For Bachelor’s degree in computer science, Engineering, Cybersecurity, or a related field, or equivalent experience. 4+ years of experience in security engineering, product/application security, blockchain security, or software development of security features. Strong hands-on experience with blockchain technologies and smart contract security, including Solidity/EVM and/or Rust/Solana, secure coding, and in-depth code review. Strong hands-on experience with blockchain technologies and smart contract security, including Solidity/EVM and/or Rust/Solana, secure coding, and in-depth code review. Experience with secure SDLC practices and security testing techniques such as static analysis, dynamic analysis, software composition analysis, and fuzzing. Strong familiarity with several of the following topics: key management, authentication and authorization, TLS and PKI, cloud security, container and Kubernetes security, infrastructure security, and network security. Strong analysis skills, detail oriented, collaborative and solution-driven, with strong verbal and written communication skills. Bonus points: Direct exposure to liquid staking, tokenized assets, or similar digital asset protocols and architectures. Published material on vulnerabilities/security bugs or meaningful security contributions within the Web3 community. Familiarity with DeFi protocol security, MPC, multi-signature systems, key management, and custody architectures. What We Offer : Competitive base salary and discretionary bonus Company-paid health and protective benefits for employees and their eligible dependents Free virtual coaching and counseling sessions Opportunities to learn about the Crypto industry Smart, entrepreneurial, and fun colleagues Employee Resource Groups *Benefits may vary depending on location. Apply now and join us on our mission to engineer a new economic paradigm. Galaxy respects diversity and seeks to provide equal employment opportunities to all employees and job applicants for employment without regard to actual or perceived age, race, color, creed, religion, sex or gender (including pregnancy, childbirth, lactation and related medical conditions), gender identity or gender expression (including transgender status), sexual orientation, marital or partnership or caregiver status, ancestry, national origin, citizenship status, disability, military or veteran status, protected medical condition as defined by applicable state or local law, genetic information or predisposing genetic characteristic, or other characteristic protected by applicable federal, state, or local laws and ordinances. We will endeavor to make a reasonable accommodation to the known limitations of a qualified applicant with a disability unless the accommodation would impose an undue hardship on the operation of our business. If you believe you require such assistance to complete the application process or to participate in an interview, please contact careers@galaxy.com.

• Разрабатывать и развивать крупное frontend-приложение на React; • Проектировать и реализовывать новые функциональные модули;

Location: Wrocław, Poland; Porto, Portugal; Sofia, Bulgaria; Madrid, Spain New opportunities in Europe! 🟢 Dev.Pro is a US-based software development company helping tech companies build their products and grow their business. We’re remote-first, and we work with independent contractors in over 55 countries, so you’d be collaborating in a multicultural environment on some really interesting projects. We invite a Senior QA Engineer to join our team and help evolve a large-scale blockchain-based platform for private markets. In this role, you’ll own end-to-end quality assurance, combining hands-on manual testing with building and expanding test automation across backend services, distributed systems, and blockchain integrations. You'll help establish testing approaches and automation practices from the ground up, working closely with engineering teams and business stakeholders to ensure reliable, high-quality releases. 🟩 What's in it for you: Work on an innovative blockchain platform designed to bring trust and transparency to private markets Deepen your expertise in blockchain systems, distributed architectures, and complex integrations Drive the development of test automation frameworks and help shape quality practices across multiple projects ✅ Is that you? 5+ years in QA/SDET roles, covering both manual and automated testing across the full SDLC Strong experience with backend and non-UI test automation Hands-on experience developing, maintaining, and debugging automated tests Strong programming skills for test automation, preferably with TypeScript/Node.js Ability to define QA strategies, test plans, and quality gates from the ground up Understanding of blockchain fundamentals, including wallets, transactions, and blockchain types Experience testing REST APIs and RPC-based interfaces (JSON-RPC, gRPC) Experience with Docker-based test environments and debugging containerized services Experience integrating automated tests into CI/CD pipelines and establishing quality gates Experience with AWS-based infrastructure Experience with MongoDB or PostgreSQL Strong analytical and problem-solving skills to identify risks and propose solutions Ability to independently manage testing activities, take ownership of deliverables, and proactively communicate progress and blockers Ability to adapt to changing priorities and demonstrate a flexible, hands-on approach to testing Ability to define testing scope and balance test coverage between QA and engineering teams Strong communication and collaboration skills across multiple stakeholders and teams Upper-Intermediate+ English level Desirable: Hands-on experience testing blockchain systems, smart contracts, and transaction flows Experience with Go for test automation EVM testing experience using Foundry, Hardhat, or similar frameworks Ability to read and understand Solidity or Rust code for smart contract validation Experience with Layer 2 solutions and blockchain protocol testing Experience testing asynchronous messaging systems (AWS SNS/SQS, Azure Service Bus) Experience with Kubernetes Experience with observability-driven testing Experience testing MCP servers Experience with performance and load testing 🧩 Key responsibilities and your contribution In this role, you'll lead testing activities across blockchain-based applications, from requirements analysis and manual validation to test automation and release support. Review business requirements and technical documentation to understand system functionality and identify testing needs Manually test new features and existing functionality to understand system behavior and guide test automation efforts Define and improve QA strategies, test plans, and quality gates Establish testing ownership and coordinate responsibilities between QA and engineering teams Work closely with engineering and product teams to define test coverage and acceptance criteria Build and maintain automated test suites, frameworks, and test harnesses, focusing on backend, integration, and contract testing Test blockchain integrations, smart contracts, REST APIs, JSON-RPC endpoints, MCP servers, and other blockchain-specific functionality Integrate and monitor automated tests within CI/CD pipelines and quality gates Investigate and troubleshoot issues across distributed systems and blockchain integrations Adjust testing priorities and approaches as project needs evolve Maintain test documentation, report quality risks, and communicate testing progress and blockers Help expand automation coverage and improve QA practices across multiple projects Our next steps: ✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Interview — ✅ Signing the Contract Interested? Find out more: 📋 How to Join Us 💻 LinkedIn Page 📈 Our website 💻 IG Page By submitting application, I've read and agree to the Dev.Pro Private Policy and Consent on Processing of Personal Data . I agree to have my Personal Data being stored and processed by Dev.Pro.