Top Tech Jobs & Startup Jobs in Seattle, WA

Design and execute test plans and strategies, perform functional/integration/regression/exploratory testing, validate end-to-end wallet and cross-chain transaction workflows, document and track defects, build and maintain automated test suites, collaborate with engineers to reproduce/debug issues, and improve QA processes and release readiness.

Design and implement scalable backend services and APIs for SwapRail, including routing engines, execution services, data pipelines, simulation/validation layers, and observability. Integrate on-chain and off-chain data sources, optimize for low-latency high-throughput execution, and collaborate with frontend and wallet teams.

Design, build, and maintain cloud infrastructure and deployment systems. Create CI/CD pipelines, manage Docker container environments, implement monitoring and alerting, optimize cost and performance, and support blockchain node reliability.

Build and maintain secure, scalable wallet integrations and transaction flows across web and mobile. Implement signing pipelines (EIP-1559/EIP-712), connection/session handling, transaction building, gas estimation and fallback strategies, nonce and re-org handling, and collaborate with backend and frontend teams to ensure secure, reliable wallet UX and execution across multiple chains.

Build and maintain performant web and mobile trading interfaces using React/React Native and TypeScript. Implement trading flows, wallet integration, real-time data visualization, reusable component libraries, and optimize UI performance under high-frequency updates while handling edge cases and collaborating with backend and wallet engineers.