Senior Software Development Engineer in Test (SDET)
Summary:
Topstep operates a real-time futures trading platform (TopstepX). Here, correctness isn't cosmetic: a defect in order handling, market-data delivery, or a balance/P&L calculation can cost a trader real money. We're hiring a Senior SDET to drive test automation across the platform — building the frameworks, shaping coverage decisions, and raising the quality bar alongside our existing SDETs.
We lean heavily on AI-assisted test generation to produce broad, meaningful coverage at scale, and you'll help extend that capability. You'll partner with product engineering teams to design for testability early, automate the journeys that matter most, and strengthen the testing practice across the group. This role suits a strong technical tester who thinks in systems and can build scalable test infrastructure while mentoring others.
Key Responsibilities
- Drive test automation across API, UI, and end-to-end — shaping where automated coverage delivers the most value against execution time and maintenance cost.
- Use and extend our AI-assisted test-generation tooling to produce and maintain broad, verification-focused coverage — applying judgment to curate, validate, and prune what the models generate rather than trusting it wholesale.
- Build and maintain scalable test
