Senior Software Engineer (Test Infrastructure)

About this role

• We’re looking for a Software Engineer, Test Infrastructure (SETI) to help build the systems that keep our TypeScript codebase fast to test, easy to trust, and safe to ship. You’ll focus on designing tools, frameworks, and pipelines that elevate the productivity and confidence of engineers working across both frontend and backend systems.
• You’ll build infrastructure that scales with our growing team, promotes engineering best practices, and catches problems before they reach production. You’ll work closely with engineering teams across the organization to ensure our testing ecosystem supports rapid development while maintaining the high reliability and security standards required in financial services
• Design, build, and maintain robust tooling and testing infrastructure to support engineering workflows across our frontend and backend systems. Create comprehensive automation frameworks for unit, integration, and end-to-end testing, leveraging tools like Jest, Playwright, Vitest, and Cypress
• Build intelligent CI/CD pipelines that run tests efficiently through advanced techniques like file-change tracking, smart test selection, and parallelization strategies
• Develop sophisticated utilities for mocking APIs, stubbing external services, and spinning up isolated testing environments that mirror production conditions
• Monitor test reliability and performance metrics to continuously drive improvements in feedback speed and signal quality across all engineering teams
• Collaborate closely with engineers to ensure code is testable, traceable, and properly instrumented to build confidence in our deployments
• Create comprehensive documentation and onboard teams to best practices in test architecture and optimized developer workflows
• Drive key technical decisions for testing infrastructure that supports our critical trading systems and portfolio management platform
• Establish testing standards and architectural patterns that enable rapid, confident product developm...