Senior Fullstack Engineer (Payments)
$157,000–$193,000 year
Hybrid · US
Job Summary
Senior Fullstack Engineer at Topstep to design, build, and operate cloud-native payments and purchasing platforms using TypeScript and React. Role emphasizes scalable, reliable, and secure systems with production-grade APIs, event-driven architectures, and strong emphasis on observability, testing, and on-call ownership. You’ll influence engineering standards, collaborate across product teams, and contribute to architecture decisions to support high-throughput, low-latency workloads. Ideal candidates have deep backend API design experience (TypeScript, GraphQL, REST), frontend development with React/Next.js, solid database fundamentals (PostgreSQL/SQL Server), and a production mindset focused on performance and maintainability.
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