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Location: Remote Workplace: remote ABOUT YOU   Xsolla is seeking a Principal Engineer with deep expertise in Identity and Golang backend development to lead the evolution of our authentication and authorization stack — enabling developers and players to connect safely and effortlessly across the Xsolla ecosystem.   ABOUT US   Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. For more information, visit xsolla.com. Responsibilities: Architect and lead the design of Xsolla’s next-generation identity platform, supporting authentication, authorization, single sign-on (SSO), and account federation across internal and external services. Develop high-performance Golang microservices that manage user identity, access tokens, and permission enforcement at global scale. Collaborate closely with security, DevOps, and platform engineering teams to embed Zero Trust principles and standardize access governance across services. Integrate modern IAM standards and protocols (OAuth2, OIDC, SCIM) to enhance developer experience and partner integrations. Mentor and coach engineering teams on secure service design, identity best practices, and cross-service communication patterns. Partner with product teams to ensure that identity-related features — such as player login, entitlement management, and account linking — are scalable, compliant, and user-friendly. Define and enforce API and data security standards, supporting compliance initiatives. Evaluate and integrate third-party identity frameworks or open-source solutions (e.g., Keycloak, Auth0, Ory, ForgeRock) as part of Xsolla’s hybrid identity strategy. Qualifications & Skills: 10+ years in backend or systems engineering, including 5+ years designing and implementing authentication and authorization services. Expert-level skills in Golang, with experience building and scaling distributed, event-driven microservices. Proven track record with identity federation, token management, and access control systems. In-depth understanding of authentication and authorization standards (OAuth 2.0, OIDC, JWT, SCIM). Solid grasp of security principles, encryption, key management, and secrets management systems (e.g., HashiCorp Vault, AWS KMS). Experience building high-availability systems in Kubernetes-based environments using AWS, or GCP. Strong architectural vision with the ability to influence cross-team design and technology direction. Excellent communication and collaboration skills across distributed teams. Nice to Have: Experience building or contributing to identity systems for gaming or SaaS ecosystems. Familiarity with multi-tenant architectures, ReBAC/ABAC models, and policy-as-code (OPA, AuthZ frameworks). Background in security engineering, DevSecOps, or compliance automation. Contributions to open-source Golang. 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 100% company-paid medical, dental, and vision plans, unlimited Flexible Time Off, 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.   Equal Employment Opportunity Statement: Xsolla is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate based on race, color, religion, sex, national origin, age, disability, sexual orientation, gender identity, or any other characteristic protected by law. We consider qualified applicants with criminal histories in accordance with the Fair Chance Act.   Criminal History Consideration: For the Principal Engineer, we will conduct a background check that may include the following: Criminal history check Employment verification Education verification   Relevance to Job Responsibilities: The background check is relevant to this position because of the following role responsibilities: Accessing confidential company data Ensuring compliance with regulatory requirements Handling sensitive financial information/managing budgets/accessing funds   Rights Under the Fair Chance Act: Applicants are encouraged to inquire about their rights under the Fair Chance Act. If you have questions regarding our hiring practices, please contact careers@xsolla.com. The listed range is specific to Los Angeles, CA, and varies based on factors such as location and experience.

Location: Warszawa, PL Hey there 👋 We are looking for a strong Python engineer to join an experienced European team in the travel-tech industry. Requirements: Solid experience with Python, especially with FastAPI; Hands-on experience with microservice architectures; Experience with Celery (or similar task queues) and RabbitMQ; Strong knowledge of PostgreSQL; Node.js + TypeScript (used for some workers, just be ready to poke around if needed). It Will Be A Plus If You: Know how to ship stuff without overcomplicating; You’re comfortable owning parts of the system; You can work with minimal process overhead; English optional, but at least B1 would be a nice plus.

Location: Ukraine; Poland; Georgia; Armenia; Moldova, Republic of Intetics Inc. is a leading American technology company providing custom software application development, distributed professional teams creation, software product quality assessment, and “all-things-digital” solutions built with SMAC, RPA, AI/ML, IoT, blockchain, and GIS/UAV/LBS technologies, is looking for a Senior PHP Developer to enrich its team with a skilled professional to spread the company’s ideas, vision, content, and messages. Responsibilities Design, develop, and test complex web applications using PHP and related technologies. Provide technical guidance and support to team members, including code reviews and knowledge sharing. Collaborate with cross-functional teams to define, design, and ship new features and functionality. Ensure the quality, performance, and scalability of our solutions through automated testing and continuous integration. Participate in the full software development life cycle, including planning, execution, and maintenance. Proactively identify and resolve technical issues and bugs. Stay up-to-date with emerging trends and technologies in web development. Requirements Bachelor's degree in Computer Science or a related field. At least 5 years of experience developing web applications using PHP and related technologies. Strong proficiency in PHP, MySQL, HTML5, CSS3, and JavaScript. Experience with Laravel or a similar PHP framework. Knowledge of front-end frameworks such as React, Angular, or Vue.js. Familiarity with Git and Agile development methodologies. Excellent written and verbal communication skills in English.

Location: Redmond, United States Job Description: We are seeking a talented Software Development Engineer with a passion for building robust backend systems. This role focuses on designing and developing scalable software solutions, primarily using Java. We’re looking for someone who excels at writing production-ready code to help drive our technology forward. Responsibilities: Design and develop high-quality backend software systems, primarily using Java. Build and maintain scalable, efficient, and reliable applications from the ground up. Collaborate with product teams to implement new features and functionalities. Write and optimize SQL queries for data management and retrieval. Leverage infrastructure as code (IaC) to support deployment of software solutions. Debug and enhance existing codebases with a focus on development. Participate in code reviews to ensure maintainability and performance. Required Skills and Qualifications: Proven experience as a Software Development Engineer, with a strong emphasis on backend development. Deep expertise in Java for building software systems. Strong understanding of software architecture and backend system design. Hands-on experience with SQL and relational databases. Familiarity with cloud environments and infrastructure as code (IaC) to support development efforts. Ability to solve complex problems through code development. Bachelor’s degree in Computer Science or equivalent experience (CS degree preferred but not mandatory). Preferred Qualifications: Previous experience at a tech-driven company (e.g., Amazon or similar) as a developer. Proficiency in Python as a secondary skill (not required, but a plus). Track record of delivering production-grade backend systems. Comfort with full-stack problem-solving, though the focus remains on backend.

Location: Los Angeles, USA Riot engineers bring deep knowledge of specific technical areas but also value the opportunity to work in a variety of broader domains. As a Software Engineer, you’ll work with both new and current technology, creating innovative solutions to overcome high-volume obstacles and to deliver player value. As a Principal Software Engineer on the League of Legends Quality Team , you will define and drive the technical vision for our core automation frameworks, ensuring the highest standards of quality across the League of Legends ecosystem. Your work will empower engineers across multiple initiatives—ranging from gameplay mechanics to skin development—by providing reliable, scalable frameworks that support efficient and robust testing practices. In this role, you'll report directly to the Engineering Manager and play a key leadership role in cross-team collaboration. You’ll work closely with engineers and QA across Riot to align on quality frameworks and workflows, elevate the developer experience, and improve the overall quality of our products. We primarily use C++ for game and tooling logic, and Python to drive our test automation and validation systems. Responsibilities: Collaboration with diverse teams to ensure features accomplish expectations from multiple dimensions (code quality, extensibility, modularity, scalability, security, operational concerns, and industry standards/trends) Work and align with different partners that span across multiple teams to ensure we're delivering awesome features to excite them Setting the tone for, contributing to, and defining technical discussions/designs that your team is accountable for Mentorship. You help Rioters develop the tools and creative atmosphere to shine, but ultimately hold them accountable for making smart calls and delivering player value Participate in the team's support rotation Required Qualifications: 8+ years of deep hands-on experiences with compiled programming languages (C/C++, Java, Go, or C#) 3+ years building and maintaining automated tests for games, web, mobile, backend services, or desktop applications (scope depending on role level). Experience with C/C++ that spans various use-cases and platforms. Have been responsible for driving value through leading the development of organization-sized efforts (1-year+ scope), including requirements gathering, planning, testing, and release or deployment Championed software development best practices within your organization that includes design/code reviews, coding standards, source control management, testing, delivery performance, scalability, and maintainability You have a strong history of mentoring others in both soft and hard skills Desired Qualifications: Leveraged machine learning, AI, and/or functional testing techniques to enhance automated testing workflows, enabling smarter test case prioritization, anomaly detection, and adaptive regression coverage across complex game systems. 2+ years experience utilizing computer vision in support of automation tests For this role, you'll find success through craft expertise, a collaborative spirit, and decision-making that prioritizes the delight of players. We will be looking at your past studies, experience, and your personal relationship with games. If you embody player empathy and care about players' experiences, this could be your role! Our Perks: Riot focuses on work/life balance, shown by our open paid time off policy and other perks such as flexible work schedules. We offer medical, dental, and life insurance, parental leave for you, your spouse/domestic partner, and children, and a 401k with company match. Check out our benefits pages for more information. At Riot Games, we put players first . That mission drives every decision in our quest to create games and experiences that make it better to be a player. Whether you’re working directly on a new player-facing experience or you’re supporting the company as a whole, everyone at Riot is part of our mission. And just like in our games, we’re better when we work together. Our goal is to create collaborative teams where you are empowered to bring your unique perspective everyday. If that sounds like the kind of place you want to work, we’re looking forward to your application. It’s our policy to provide equal employment opportunity for all applicants and members of Riot Games, Inc. Riot Games makes reasonable accommodations for handicapped and disabled Rioters and does not unlawfully discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, handicap, veteran status, marital status, criminal history, or any other category protected by applicable federal and state law. We consider for employment all qualified applicants, including those with criminal histories, in a manner consistent with applicable federal, state and local law, including the California Fair Chance Act, the City of Los Angeles Fair Chance Initiative for Hiring Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, the San Francisco Fair Chance Ordinance, and the Washington Fair Chance Act. Per the Los Angeles County Fair Chance Ordinance, the following core duties may create a basis for disqualifying candidates with relevant criminal histories: Safeguarding confidential and sensitive Company data Communication with others, including Rioters and third parties such as vendors, and/or players, including minors Accessing Company assets, secure digital systems, and networks Ensuring a safe interactive environment for players and other Rioters These duties are directly related to essential operations, safety, trust, and compliance obligations within our organization. Please note that job duties may evolve based on business needs and additional responsibilities may be assigned as necessary to maintain operational efficiency and security.

Location: Tallinn, Estonia; Helsinki, Finland; Abu Dhabi, United Arab Emirates; Dubai, United Arab Emirates; Sharjah, United Arab Emirates Workplace: on-site At TechBiz Global , we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a Senior Protocol Engineer to join one of our clients' teams . If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you. You’ll be leading the design and development of next-generation consensus models, building secure and scalable EVM systems, and mentoring a world-class engineering team. What You’ll Do Lead the development of EVM-based systems and blockchain infrastructure. Design and implement Proof of Stake and other consensus models . Build and optimize smart contract platforms and tooling . Collaborate with leadership to define technical strategy and roadmap. Mentor engineers, fostering a culture of innovation and excellence. Drive decentralization and scalability improvements. 10+ years of experience in blockchain protocols, distributed systems, or AI infrastructure. 7 to 8 years hands-on expertise with consensus algorithms and cryptography . Proven track record in blockchain protocol design . Strong background in software engineering (Rust, Go, Solidity, JavaScript, Ruby, etc.). 10 years of experience in leading technical teams in blockchain/crypto companies . Contributions to open-source blockchain projects . A reputation as an innovator in blockchain/crypto . Nice-to-Have Experience in multi-coin pools or algorithmic optimization. Familiarity with NEAR, Blackcoin, Ethereum, BitHalo, or similar ecosystems . Why Join Us? This is a chance to work with a passionate team, shape the future of decentralized technologies, and build solutions that will define the next era of blockchain.

Location: Cyprus; Portugal; Spain; Latvia; Germany Intetics Inc. , a global technology company providing custom software application development, distributed professional teams, software product quality assessment, and “all-things-digital” solutions, is seeking a highly skilled and experienced Senior PHP Engineer to join our dynamic team. As a Senior PHP Developer at Intetics, you will be responsible for developing, maintaining, and enhancing web applications using PHP and related technologies. You will work closely with cross-functional teams to deliver high-quality software solutions that meet client requirements and industry best practices. The client is a leading company specializing in advanced cybersecurity solutions. They provide comprehensive security measures designed to protect sensitive data and systems from cyber threats. Their offerings include vulnerability management, threat intelligence, incident response, and compliance management. With cutting-edge technology and a team of experts, they ensure robust protection for organizations across various industries, helping clients stay ahead of evolving cyber threats and maintain a secure digital environment. About the project: The only Risk-Based Vulnerability Management Platform purpose-built for the world’s most complex enterprises. Requirements Minimum of 5 years of professional experience in PHP development Excellent knowledge of DB Extensive experience working with large volumes of data Experience in writing complex and optimized SQL queries Excellent knowledge of modern versions of PHP Experience working with relational databases (SingleStore/MemSQL a bonus) Experience maintaining applications on Linux platforms in cloud environments Background following Agile/Scrum methodologies in a professional setting Demonstrated experience with technical troubleshooting Ability to work independently and with a team, including with a team across different time zones Would be a plus: Experience working with vulnerability scanning technologies on any part of the tech stack (e.g., SCA, SAST, DAST, IAST, VM scanning, container, etc.) Experience working in cloud environments, ideally AWS Experience working with data analytics and/or data science Benefits Paid Time Off (36 paid days per year) Work From Home Training & Development Partial medical compensation

Location: Lviv Workplace: onsite Ajax Systems — міжнародна технологічна компанія і найбільший у Європі виробник охоронних систем. Ми шукаємо нового гравця до підрозділу System на позицію С++ Developer, Video team Підрозділ System відповідає за створення та розвиток програмної екосистеми Ajax. Команда розробляє та підтримує OS Malevich і Video Management System, будує масштабовану cloud-інфраструктуру та створює клієнтські застосунки для різних платформ, забезпечуючи узгоджену роботу всіх компонентів системи. У роботі використовуються Java, Kotlin, Swift, C, C++, Python. До складу входять embedded, cloud, mobile та desktop інженери, які забезпечують функціонування єдиної цифрової платформи.   Необхідні знання та навички: Досвід C++ 4 + роки (C++11/C++14) Досвід роботи з boost, зокрема boost.asio Розуміння принципів роботи процесів, потоків та асинхронної обробки Вміти та писати модульні/інтеграційні тести (культура застосування TDD буде плюсом) Вільне володіння git, cmake, gdb Знання linux/posix-сумісних систем, знання bash, розуміння принципів роботи ядра linux Практичний досвід проектування та розробки великих систем Буде плюсом: Досвід роботи з embedded системами та системами з обмеженими обчислювальними ресурсами Досвід роботи з потоковим відео Експертний рівень у роботі з протоколами передачі сигналів та потокової передачі даних (RTSP) Детальне знання та розуміння протоколу та стеку RTP/RTCP Знання та розуміння внутрішнього пристрою форматів відеокодеків HEVC, H.264 Досвід роботи з GRPC/web sockets, WebRTC, GST, LiveMedia, Video codecs/playback Досвід роботи з форматами упаковки мультимедіа, такими як HLS, DASH, а також із шифруванням Досвід роботи з критично важливими відео додатками та стандартами Вільне орієнтування в опенсорсних бібліотеках, від ffmpeg до OpenCV Практичний досвід використання та інтеграції з відповідними технологіями з відкритим вихідним кодом Досвід реалізації конвеєра обробки відео для мультимедійних програм (відтворення, запис, перекодування, потокова передача)   Задача команди: Підтримка технічної культури з тестами та CD Спільно з командою, продовжувати роботу над новим продуктом із використанням відеокамер для завдань безпеки у поєднанні з традиційними охоронними датчиками Розвивати інженерні практики та підвищувати якість коду Брати участь в обговоренні нової функціональності продукту та відповідати за розвиток продукту як частини системи Пропонуємо: можливість пропонувати та реалізовувати власні ідеї, які впливають на продукт та його масове виробництво; місце у стрімко зростаючій компанії з вмотивованою професійною командою; конкурентну заробітну плату; медичне страхування; корпоративні заняття з англійської мови; можливість взяти участь у внутрішньому проєкті бета-тестування систем безпеки Ajax; знижки від компаній-партнерів; знижки на продукти компанії.

Location: United States, Remote Are you on a mission to create games that bond players together into deeply invested communities? Would you like to work on something comedic with lighthearted and whimsical characters? Do you enjoy the challenge of solving complex, non-deterministic problems with simple, pragmatic solutions? As a Staff Services Engineer for teamLFG, you will design and build the core services that take our game from prototype to production, from gathering requirements to implementation and scaling. Most importantly, you will work with a fun, dedicated, and passionate cross-discipline team devoted to turning a creative dream into a new franchise at PlayStation. We look for candidates who value joining a mission-focused team with a diverse set of backgrounds, experiences, interests, and viewpoints. RESPONSIBILITIES Build and maintain production-quality backend game services Collaborate daily with a cross-disciplinary team to design the core services for the game (including sessions, matchmaking, and player progression) Effectively write clear, concise, and accurate technical documentation and email communication, with the ability to summarize complex topics and achieve alignment across multiple teams Calmly deal with production incidents, participating in an on-call rotation after launch REQUIRED SKILLS Production experience designing and building backend game services Ability to communicate with customers of different technical and non-technical backgrounds to help them navigate technology and achieve their goals Ability to diagnose complex system failures using logging and metrics Ability to write, debug, and maintain code in Rust Embrace a “we” culture in addition to being an outstanding collaborator and communicator NICE-TO-HAVE SKILLS Experience with “games as a service” online game development Experience leading (direct management, mentoring, or guiding) engineers Ability to write, debug, and maintain code in C++ Working knowledge of Docker, Git, and Linux (including shell scripting and system configuration) At SIE, we consider several factors when setting each role’s base pay range, including the competitive benchmarking data for the market and geographic location. Please note that the base pay range may vary in line with our hybrid working policy and individual base pay will be determined based on job-related factors which may include knowledge, skills, experience, and location. In addition, this role is eligible for SIE’s top-tier benefits package that includes medical, dental, vision, matching 401(k), paid time off, wellness program and coveted employee discounts for Sony products. This role also may be eligible for a bonus package. Click here to learn more. This is a flexible role that can be remote, with varying pay ranges based on geographic location. For example, if you are based out of Seattle, the estimated base pay range for this role is listed below. $190,000 — $285,000 USD Please note, Sony Interactive Entertainment conducts background checks at the offer stage for all new employees (which may include criminal background checks for some roles) and will need to process personal information to support these checks. Please refer to our Candidate Privacy Notice for more information about what personal information we collect, how we use it, who we share it with, and your data protection rights.

Location: Philippines Are you interested in building an exciting IT career at Dev.Pro? Join our exclusive screening process to gain valuable career insights and access personalized feedback on your skill set. As a company of professionals, Dev.Pro offers challenging and interesting projects with world-leading clients, a modern technology stack, and career opportunities for both technical and non-technical specialists. 🟩 What you’ll get by applying: Personalized career growth plan tailored to your aspiration Expert feedback to elevate your skills for lasting success Priority consideration by Dev.Pro for suitable job openings within the company Opportunity to work with top global corporations and participate in industry-shaping projects Give us a chance to get to know you better so that when the right position becomes available, you’ll be the first one we reach out to! ✅ Is that you? 5+ years of experience developing software with C# and .NET Experience building backend services and REST APIs Experience with .NET Core / .NET 6+ or newer Strong experience with relational databases (SQL Server, PostgreSQL, MySQL, etc.) Experience working with cloud platforms (Azure, AWS, or GCP) Experience designing or developing microservices or distributed systems in production Understanding of application architecture and design patterns Strong understanding of object-oriented programming (OOP) principles Nice to Have Experience with message queues or event-driven systems (Kafka, RabbitMQ, Service Bus, etc.) Experience with Docker or containerized environments Experience with CI/CD pipelines Get started now: 1. Send us your CV in English. 2. Schedule a 15-30 minute call with Dev.Pro recruiters. 3. Participate in a 30-minute experience interview focused on testing your soft skills. 4. Get a 1-hour online evaluation of your technical skills by our technical experts. In under 2 hours, you'll know where you stand in your career and be ready for action when Dev.Pro presents you with an exciting job offer! 🎾 About Dev.Pro Dev.Pro is a US-based outsource company with an ambitious and creative mindset that has been delivering superior software products since 2011. Known for its strong human focus, Dev.Pro promotes a work environment that is fair, inclusive, open-minded, and friendly toward people of every race, religion, gender, cultural background, marital/parental status, etc. By joining Dev.Pro, you'll feel what it's like to grow with professionals who support your journey. 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.

Location: Remote Workplace: Remote Blockstream https://blockstream.com/ was founded in 2014 by Dr. Adam Back https://en.wikipedia.org/wiki/Adam_Back and a group of fellow cryptographers and engineers who are passionate about Bitcoin and its potential to change the world. Today, Blockstream is the leading Bitcoin company, providing cutting-edge infrastructure solutions for enterprises, institutions, and individual Bitcoin users. We develop industry-leading Bitcoin self-custody solutions, Bitcoin-based financial products, second-layer scaling technologies, and enterprise-grade blockchain infrastructure. As Rust-Simplicity Maintainer, you will be the primary steward of Blockstream’s Rust-based Simplicity implementation and associated libraries. These libraries include rust-simplicity, SimplicityHL, hal-simplicity, rust-elements, and elements-miniscript, all of which need to work together performantly, coherently and in sync with the wider Simplicity project. This role includes architecture, implementation, review and maintenance of these libraries, which are written and Rust and cover creation, analysis and wallet integration of the Simplicity blockchain language. What You’ll Be Doing (Responsibilities): - Core Ownership: Maintain the Rust implementation of Simplicity, expanding it to cover new use-cases and improving our CI and QA processes. - Multi-Repo Maintenance: The Simplicity integration covers multiple crates, including rust-simplicity, SimplicityHL, hal-simplicity, rust-elements, and elements-miniscript. - Code Review & Quality Assurance: Provide at least one additional maintainer-level code review for each repository to ensure that nothing merges without at least one signoff independent of the author. - Continuous Integration: Maintain and improve CI pipelines to ensure robust, automated testing and quick feedback on code changes. - Ecosystem Integration: Collaborate with other teams to integrate Simplicity into Bitcoin-related projects, such as Elements and Liquid. - Community Engagement: Review pull requests, manage GitHub issues, and guide open-source contributors across all maintained projects. - Documentation: Maintain clear, developer-friendly documentation for internal and external audiences. What We Look For In You (Required Qualifications): - Strong proficiency in Rust (2+ years professional experience preferred). - Familiarity with Bitcoin, blockchain protocols, or cryptographic systems. - Strong written communication skills and ability to work in a globally distributed team. Nice To Haves (Preferred Qualifications): - Proven track record of maintaining or leading open-source projects. - Knowledge of formal methods, theorem provers, or functional languages like Haskell. - Understanding of Simplicity’s design goals and architecture. - Experience with blockchain virtual machines, scripting systems, or transaction policy tools like Miniscript. - Prior contributions to Bitcoin Core, Elements, or related protocol implementations. 🔒 Stay Safe from Job Scams All official Blockstream communication will come from an @blockstream.com email address. We will never ask you to share sensitive information or purchase equipment during the hiring process. If in doubt, contact us at hr@blockstream.com. Learn more about avoiding job scams here https://consumer.ftc.gov/consumer-alerts/2022/05/want-work-home-spot-scams-first.

Location: Remote About Us In partnership with SBI Group, we aim to bring the majority of Japanese equities on-chain, creating a secure, transparent, and high-performance trading infrastructure that can support institutional volumes while remaining accessible to retail participants. We are building a next-generation decentralized exchange with a fully on-chain order book. Our system is built with a custom state transition function and consensus layer, purpose-designed for high-performance, low-latency trading. The goal is to deliver a trustless platform that matches the speed and efficiency of traditional trading engines while providing full transparency by running execution as close as possible to the blockchain itself. Position Overview We are looking for a Senior Rust Engineer with strong expertise in system architecture and execution engines. You will be responsible for designing and implementing the CLOB execution layer, including the order book, matching engine, and blockchain client logic. This role is highly technical and requires end-to-end ownership of critical components, from architecture to optimization. While you’ll primarily collaborate with a remote team of experienced engineers, there will occasionally be opportunities to work onsite during offsite sessions to support onboarding and enable more efficient collaboration. Joining at this early stage of development offers a unique opportunity to influence critical technical decisions, achieve career growth, and enjoy competitive compensation. Key Responsibilities Architect and implement the on-chain order book and matching engine in Rust. Design and extend exchange-specific logic (order execution, risk checks, account/state management). Design and develop protocol-level components, such as state transition logic, consensus, validator interaction, and transaction processing pipelines. Implement integration with oracles, bridges, and external data providers, ensuring correctness and resilience in adversarial conditions. Optimize for low-latency execution, concurrency, and gas efficiency. Conduct benchmarking and stress testing to identify and address potential performance/throughput bottlenecks. Develop and maintain a comprehensive suite of unit, integration, and end-to-end tests to ensure code reliability and functionality. Requirements 5+ years of systems programming experience, with 3+ years in Rust. Proven track record building trading platforms, execution engines, or exchanges (DEX or centralized). Contributions to Rust-based L1 protocol projects (e.g., Solana, Cosmos SDK, Substrate). Deep understanding of distributed computing principles, including consensus algorithms, peer-to-peer (P2P) networking, and high-performance data structures. Deep knowledge of decentralized trading models (on-chain order books, AMMs, hybrid architectures). Ability to design and implement complex, production-grade systems independently. Big Bonus Experience with competitive programming or algorithmic problem solving. Expertise in low-latency design, concurrency, and performance optimization.

Location: Global Workplace: Remote Tempo is a layer-1 blockchain purpose-built for stablecoins and real-world payments, born from Stripe’s experience in global payments and Paradigm’s expertise in crypto tech.   Tempo’s payment-first design provides a scalable, low-cost predictable backbone that meets the needs of high-volume payment use cases. Our goal is to move money reliably, cheaply, and at scale. Our north star is simplicity for users: fintechs, traditional banks, merchants, platforms, and anyone else looking to move their payments into the 21st century.   We're building Tempo with design partners who are global leaders in AI, e-commerce, and financial services: Anthropic, Coupang, Deutsche Bank, DoorDash, Mercury, Nubank, OpenAI, Revolut, Shopify, Standard Chartered, Visa, and more.   We’re a team of crypto-optimists, building the infrastructure needed to bring real, substantial economic flows onchain. We like to move fast and swing for the fences — join us! Responsibilities - Design, develop and ship complex features, indexing on performance and benchmarking - Own development throughout the entire lifecycle, with a focus on deep collaboration, quick iteration cycles and incorporating stakeholder feedback Qualifications - Significant experience building scalable, distributed systems in Rust - Deep familiarity with the Ethereum ecosystem, particularly the EVM and Execution Layer, as well as reth and consensus mechanisms; hands-on experience working across the entire Ethereum stack is ideal - Self-motivated and independent, and excited by ambiguity and opportunities to develop concrete solutions to nebulous problems - Collaborative and an exceptional communicator Attributes - High motor - Razor-sharp thinker with precise command of language - Concise, evidence-based communicator - Excellent organizational and logistical skills - Intense curiosity and open-mindedness - Scrappiness; willingness to roll up sleeves - Growth mindset

Location: London 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: We’re seeking an experienced Algo Trading / Head of Execution to join our team. You have a proven track record of building and benchmarking execution algorithms. Ideally, you’ve been actively engaged with the crypto markets or have a strong curiosity about them. In this role, you will take the lead in developing greenfield algorithmic trading systems, shaping the core of our next-generation trading infrastructure. You’ll work closely with trading teams, stakeholders, and external partners to deliver critical initiatives that drive our business forward. If you’re a natural problem-solver with a passion for hands-on technical development in a global, fast-paced environment, we want to hear from you. What You’ll Do: Design and lead the development of a low-latency, high-throughput Algo Trading / Smart Order Router system Implement intelligent routing algorithms based on execution quality, liquidity, latency, and cost Collaborate with traders, and product managers to refine routing logic and build new algorithmic capabilities Integrate the SOR with the trading, booking and reporting stack Monitor and optimize system performance under real-world trading conditions Mentor junior developers, enforce code quality standards, and contribute to architectural decisions Provide support for production trading issues and continuously improve system resilience and failover mechanisms What We’re Looking For: 10+ years of experience developing routing strategies for specific markets (e.g., U.S. equities, EU markets, crypto exchanges) Knowledge of tick data analytics and real-time market data processing Familiarity with cloud-based market access or hybrid deployments Experience working in high-frequency or algorithmic trading environments Experience building low-latency systems and working with multicast/unicast market data feeds A solid understanding of the application stack and infrastructure associated with electronic and algorithmic trading Strong technical background, with the ability to understand system architecture and technical workflows Proficiency in FIX protocol and trading system architecture (OMS/EMS, market gateways) Familiarity with concurrency, networking, and memory management Experience with Linux systems and performance profiling tools A proactive, problem-solving mindset and the ability to thrive in a fast-paced, collaborative environment Bonus Points: Deep understanding of electronic trading, order types, and market microstructure (equities, options, FX, Crypto etc.) Experience in the DeFi, or crypto space Exposure to regulatory or compliance-driven environments Familiarity with cloud-based infrastructure (e.g., AWS, GCP) or DevOps processes 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. 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.

Location: North America and Europe Who We Are: Alpaca is a US-headquartered, global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, 24/5 trading, and more. Amongst our subsidiaries, Alpaca is a licensed financial services company, serving hundreds of financial institutions across 40 countries with our institutional-grade APIs. This includes broker-dealers, investment advisors, wealth managers, hedge funds, and crypto exchanges, totalling over 10 million brokerage accounts. Our global team is a diverse group of experienced engineers, traders, and brokerage professionals who are working to achieve our mission of opening financial services to everyone on the planet. We're deeply committed to open-source contributions and fostering a vibrant community, continuously enhancing our award-winning, developer-friendly API and the robust infrastructure behind it. Alpaca is proudly backed by $400 million in funding from top-tier global investors including Portage Ventures, Spark Capital, Tribe Capital, Social Leverage, Horizons Ventures, Opera Tech Ventures, SBI Group, Derayah Financial, Unbound, Peak XV, Elefund, and Y Combinator. Our Team Members: We're a dynamic team of 400+ globally distributed members who thrive working from our favorite places around the world, with teammates spanning the USA, Canada, Japan, Hungary, Nigeria, Brazil, the UK, and beyond! We're searching for passionate individuals eager to contribute to Alpaca's rapid growth. If you align with our core values—Stay Curious, Have Empathy, and Be Accountable—and are ready to make a significant impact, we encourage you to apply. As a senior software engineer, you will help build and scale the systems and services that form the foundation of Alpaca and empower millions of users who are trading billions of dollars worth of assets. The market data team is responsible for improving the overall architecture of Alpaca connected to data products such as stocks, options, crypto, and foreign exchange markets. Oversee their public API structure and documentation on both streaming and historical endpoints. The team is responsible for building a cohesive developer-first API and is tasked with planning, ideating, experimenting, and putting into production the new services, and libraries that overcome some of our greatest technical challenges as we continue to scale rapidly. We are looking for senior or staff engineers who are keen on providing quality solutions, have great fundamentals, have proven experience building and architecting at scale, and are not afraid of challenging conventions. This demanding team also requires a deep understanding of POSIX-like operating systems, modern infrastructure, and orchestration practices. Things You Get To Do: Influence the overall architecture of Alpaca’s market data systems Design highly scalable, mission-critical systems Obsess over latency (every nanosecond counts) Implement backend services and lead architecture where scalability and resilience matters Maintain good software quality and test coverage Participate in code reviews Troubleshooting on incidents and reported bugs You may be asked to be on-call to assist with engineering projects that are timely in nature Who You Are (Must-Haves): At least 4 years of experience working on systems at scale Experience with at least compiled imperative languages (e.g. Go, C, C++, Rust, etc.). Most of our critical services are written in Go SQL or relational database skills Familiarity with TCP/IP, and UDP networking Proficient with Linux/BSD, and shell scripting Excited about what we are building at Alpaca Proven track record of architecting and leading medium-scale projects involving multiple teams Experience with Kubernetes or other workload orchestration and scheduling systems (we primarily use Kubernetes via GKE) Experience with major cloud platforms (we primarily use GCP) A passion for financial markets Who You Might Be ( Nice-to-Haves): Experience with Market Data Knowledge of microservice architectures Knowledge of clean code principles DevOps mindset is an asset Cloud Networking experience (BGP, VPC peering) Experience in building low-latency applications Experience with distributed key-value stores Experience with CI/CD A passion for financial markets or the desire to learn Knowledge of Agile/Scrum methodologies Experience with observability, tracing, continuous profiling Experience with capacity planning and benchmarking How We Take Care of You: Competitive Salary & Stock Options Health Benefits New Hire Home-Office Setup: One-time USD $500 Monthly Stipend: USD $150 per month via a Brex Card Alpaca is proud to be an equal opportunity workplace dedicated to pursuing and hiring a diverse workforce. Recruitment Privacy Policy

Location: Baku; Serbia; Canada Workplace: onsite ABOUT YOU We’re looking for a Senior Backend Software Engineer who thrives on solving complex technical challenges and building distributed systems that scale. You’re someone who’s comfortable working with Go, embraces microservices architecture, and understands how to build robust, event-driven systems used by millions of users.   You have experience working in containerized environments, designing resilient services, and contributing to system design and infrastructure decisions. You take ownership of your code from design to deployment, and enjoy collaborating with cross-functional teams to deliver high-impact, production-ready solutions.   If you’re passionate about building backend systems that are scalable, observable, and fault-tolerant, and you’re excited by the idea of powering innovative products at the intersection of games, commerce, and data, we’d love to hear from you.   ABOUT US Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game.   For more information, visit xsolla.com. Responsibilities Design, build, and maintain backend services that power core products and platforms. Develop event-driven systems using Go, Kafka, and Temporal (or similar orchestration tools). Build scalable microservices in containerized environments using Docker and Kubernetes. Drive architecture decisions that improve performance, resiliency, and maintainability. Collaborate with engineers, product managers, designers, and QA to deliver end-to-end solutions. Own your code in production, monitor, debug, and continuously improve service performance and reliability. Write automated tests and follow CI/CD best practices to ensure high-quality deployments. Participate in code reviews, technical discussions, and knowledge sharing across teams. Qualifications & Skills 5+ years of backend development experience in Go or a similar language. 2+ years of hands-on experience with Kafka or equivalent streaming platforms. Strong understanding of microservices architecture, distributed systems, and event-based communication. Experience working with workflow orchestration tools such as Temporal, Cadence, or similar. Familiarity with cloud infrastructure and container orchestration (e.g., Kubernetes, Docker). Solid understanding of observability, monitoring, and performance optimization. Ability to troubleshoot production issues, analyze system behavior, and drive resolution. Nice to Have Experience with cloud platforms (e.g., AWS, GCP, or Azure). Familiarity with ClickHouse, Postgres, or other analytical/OLAP/OLTP databases. Background in gaming, payments, or commerce systems. Prior experience working on internal platforms or developer-facing tools. The duties and responsibilities of this position may evolve over time to support the organization’s goals and individual growth. This job description is intended to outline the general nature and level of work being performed and is not intended to be an exhaustive list of all duties, responsibilities, and qualifications required. By submitting your application, you consent to Xsolla conducting background checks, where permitted by law, after the final interview stage. All checks will comply with local regulations, and your information will be handled confidentially. Xsolla takes your privacy seriously and will not sell or externally distribute any personal data received during the hiring process. In accordance with applicable data protection laws, Xsolla is committed to protecting your personal information and respecting your privacy. For any inquiries related to data privacy, please contact: careers@xsolla.com Explore more opportunities at: https://xsolla.com/careers

Location: Singapore, Singapore OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa About OKX 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 Join our Retail Trading team and you will be working alongside a high-performing team to deliver comprehensive and timely market information to millions of retail users. You will leverage your expertise to design and build easy-to-use applications with distinguishable precision, speed, and insights. In this role, you’ll also contribute to the evolution of our architectural foundations, ensuring that our solutions remain reliable, scalable, and adaptable in a rapidly evolving market. What You’ll Be Doing Design, develop, and maintain high-quality backend systems for market analysis in a fast-paced, dynamic environment. Collaborate closely with product managers, frontend engineers, and infrastructure teams to deliver scalable and efficient solutions. Continuously improve system reliability, scalability, and maintainability through thoughtful design and engineering best practices. Actively participate in code reviews, architecture design discussions, and technical planning sessions. Contribute to team culture by sharing knowledge, writing documentation, and mentoring other engineers. What We Look For In You 10+ years of backend development experience in internet-scale environments, with strong system design and engineering capabilities. Proficient in Java, with solid computer science fundamentals and a commitment to clean, maintainable code with strong attention to code quality, with an emphasis on readability, scalability, and maintainability. Experience designing and leading the development of complex, consumer-facing systems. Background in building internet-scale growth or operations platforms (e.g., content operations, user engagement, or growth automation systems). Familiar with mainstream middleware and infrastructure components such as MySQL, Kafka, Elasticsearch, and Redis. Experienced in microservices architecture design and knowledgeable about service governance frameworks (e.g., Nacos, Sentinel, Gateway) and containerization technologies (e.g., Docker, Kubernetes). Strong understanding of multithreading, network models, and JVM memory architecture. Nice to Haves Product-minded, with the ability to assess value and prioritize from a user's perspective. Highly self-motivated, curious, and growth-oriented. Strong alignment with company values and a willingness to lead by example. A genuine interest in the cryptocurrency industry and belief in its long-term potential. 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! #LI-ML1 #LI-ONSITE 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: North America Workplace: Remote At Linear, we're building the product development system for teams and agents. AI is fundamentally changing how software gets built, and we’re shaping the tools this new era requires. Founded in 2019, Linear has become the platform of choice for more than 50,000 companies (including OpenAI, Coinbase, and Ramp) to plan, build, and ship their products. Today, our team is distributed across North America, Europe, and Australia, and we’re continuing to grow internationally. What unites us is relentless focus, fast execution, and a deep care for software craftsmanship. We’re looking for experienced engineers who have shipped applied AI systems to production and want to define what the agent-native future looks like. We are building intelligence into the core of Linear, enabling the product to orchestrate coding, proactively move work forward, and power-up every software team. You’ll work closely with product and design to transform foundation models into structured, reliable workflows embedded deeply in the core of Linear. We care deeply about keeping Linear fast, intuitive, and opinionated—AI is no exception. Location & work mode Linear is a remote-first company, with optional co-working offices in San Francisco, New York, and London. This role is open to candidates based in the North America. You can work from anywhere within this region. We value deep focus and async collaboration, with intentional moments to connect in person through team off-sites, optional co-working, and occasional travel. What you'll do - Build AI-powered product features that feel native, fast, and delightful to use - Work with product and design to prototype and iterate on intelligent workflows and user interactions - Design backend services to power natural language interfaces, smart suggestions, agentic workloads, and more - Optimize prompts, fine-tune model behavior, and evaluate performance - Help to guide our agent platform, allowing third parties to bring agents into the core Linear experience as teammates. - Contribute to the architecture for AI-integration infrastructure that’s reliable and privacy-aware What we're looking for - 5+ years of experience building customer-facing products at a high-quality software company - Strong React and TypeScript fundamentals, with experience across the full stack (Browser technologies, Node, GraphQL, PostgreSQL) - Track record of driving complex, end-to-end features (not just incremental improvements and refactors) with visible impact on the product - Product sensibility: you care about UX, speed, and polish, and you push back when something doesn't feel right - Comfortable working without heavy PM overhead; you can help to shape the problem, not just implement a solution - High ownership mentality: self-directed, full-lifecycle builder who takes a feature from idea to shipped - Thrives in a remote, async-first environment with a lean, high-output team - Experience at a startup or a company with a genuinely high engineering bar Our tech This stack reflects the systems we build and operate. You’re not expected to have experience with everything listed, but you should be excited to work close to product, performance, and real-world scale. - Agentic workload system utilizing temporal, operating at production scale - Proprietary websocket data sync framework built for speed and offline support - React, MobX, styled-components on the frontend - Extensive, widely used, GraphQL API and SDK - Node, Postgres, Temporal, and Redis in the backend - Hosted on Google Cloud with k8s - GitHub, Slack, Notion What we offer We're a small, focused team that cares deeply about the quality of our work and the people we do it with. Here's what you can expect: - Competitive salary and equity - Employee-friendly equity terms including early exercise in the US and extended exercise windows - Daily meal and coffee stipend on every workday - Paid co-working space or desk - Health coverage (based on country requirements) - 5 weeks paid vacation, plus local statutory holidays - 4 months paid parental leave - Paid month off after 4 years & every 2 years thereafter - Regular team events and off-sites - Remote-first with no required commute Learn how we think and work - Read Me https://linear.app/readme a story about our mission - Our hiring process: How we hire at Linear https://linear.app/now/how-we-hire-at-linear - How we work: Designing remote work at Linear https://linear.app/now/designing-remote-work-at-linear - Why and how we do work trials https://linear.app/blog/why-and-how-we-do-work-trials-at-linear Linear blog post - Crafting quality that endures https://www.youtube.com/watch?v=pCil7YNhNCU Config keynote by our Co-founder & CEO, Karri Saarinen - How we use AI in design https://designerfund.substack.com/p/ai-design-linear feature of Linear's design team - Scaling our real-time sync engine https://linear.app/blog/scaling-the-linear-sync-engine talk by our cofounder, Tuomas Artman, at Linear's 2023 offsite - First Round Capital: The Unsung Ingredient: Taste https://review.firstround.com/stripe-square-linear-product-taste/ - Our recent tender offer: Sharing Linear’s growth with the people building it https://linear.app/now/sharing-growth-with-the-people-building-linear A note on recruitment fraud: all official Linear hiring communication comes from an @linear.app http://linear.app email address, and all open roles are listed at linear.app/careers http://linear.app/careers. We never ask candidates for payment or financial information. Suspicious messages can be reported to security@linear.app. Linear is an equal opportunity employer. We do not discriminate based on race, color, religion, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, or any other protected characteristic under applicable law.