Hiring: Senior Software Development Engineer in Test (SDET) Company: Topstep Location: United States Job Posted Time: 2026-09-10 12:07:57 Employment Type: Full-time / Remote Target Skills & Keywords : .NET, ArgoCD, C#, CI/CD, Cypress, GitHub Actions, Kubernetes, LLM, Playwright, REST, RESTful, React, Selenium, Slack, Terraform, TypeScript, WebSocket About the job Required Skills: •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 frameworks and infrastructure that run in CI/CD, including for real-time paths: order lifecycle, market-data streams over WebSocket, and financially material calculations. •Partner with product and engineering early to define testability requirements and quality standards, rather than validating after the fact. •Lead by example on test code quality — clean, maintainable, well-documented, and a model for the team. •Own the signal from the test suite: triage failures fast, keep flakiness low, and make results and quality metrics visible and trustworthy to engineering. •Surface and drive resolution of quality gaps, systemic testing weaknesses, and test-related technical debt. •Mentor engineers and SDETs on automation patterns, AI-assisted testing workflows, non-functional testing (performance, load, resilience), and a quality-first mindset. Qualifications: •Non-functional testing experience: performance, load, and resilience. •Operational familiarity with ArgoCD, Terraform, and Kubernetes. •Contract / consumer-driven testing between services. •Observability-driven testing (using logs, metrics, traces to validate behavior). Compensation: •$155,000 - $190,000 / year •Flexible work environment (work from home / hybrid options) •Paid time off is front-loaded Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!