Remote | Full-time About Us At Gateway.fm , we’re building the future of decentralized infrastructure. As a leader in Web3, we develop scalable blockchain solutions supporting Ethereum scaling technologies like zkEVM and optimistic rollups . Our infrastructure secures over $1 billion in digital assets and empowers institutional clients to stake in a non-custodial and scalable way. We're also the team behind Stakeway , a high-performance platform transforming the staking ecosystem. With a globally distributed and mission-driven team, we’re united by a shared vision: unlocking the full potential of decentralized technologies. The Role We’re looking for a QA Engineer to join our core engineering team and help ensure the reliability, scalability, and performance of our blockchain infrastructure. You’ll play a key role in designing, executing, and automating tests for blockchain nodes ( Erigon ), JSON-RPC APIs , and CDK-based infrastructure . What You’ll Do Design, write, and maintain test plans and cases for Erigon (Ethereum node) deployments Build and extend automated tests for APIs, infrastructure, and blockchain components Perform manual and exploratory testing of new features, deployments, and updates Conduct load and performance testing using tools like k6 and polycli Test and validate JSON-RPC interactions and behaviors Collaborate closely with developers to identify and troubleshoot issues early in the development cycle Help optimize and scale testing practices as our infrastructure evolves Tools You’ll Work With k6 (Load testing) polycli (Blockchain API testing) Kurtosis (End-to-end environment testing) Hive (Ethereum testing framework) – nice to have What We’re Looking For 5+ years of experience in QA Engineering , covering both manual and automation testing Proven experience testing backend services , APIs , and infrastructure systems Familiarity with blockchain technology — Erigon experience is a major plus Strong background in load and performance testing Deep understanding of API testing methodologies and tools (e.g., Postman, Newman) Scripting skills (Python, JavaScript, or similar) for automation and tooling Detail-oriented with strong analytical and problem-solving skills Comfortable working independently in a fully remote, fast-paced environment Bonus Points Experience with AWS CDK or similar cloud development tools Hands-on experience testing Ethereum clients and JSON-RPC interfaces Familiarity with CI/CD pipelines and integrating automated tests Why Join Gateway.fm? Work on real blockchain infrastructure powering live production systems Fully remote and flexible work setup Flat and fast-moving team — your work will have a visible impact Opportunity to shape QA processes and tooling from the ground up If you’re excited about high-impact engineering, decentralized infrastructure, and a culture of ownership — we’d love to hear from you. Apply now and help us build the backbone of Web3.