Jobs at Topstep

Own and evolve core trading platform services: design and build cloud-native .NET microservices, APIs, and high-availability distributed systems. Drive architecture, reliability, monitoring, incident response, and mentor engineers while occasionally contributing to React/TypeScript frontend work.

Lead the Payments & Wallet product area: own roadmap for checkout, funding, balances, transfers, payouts, disputes, and new payment methods. Define PRDs, coordinate cross-functional delivery, run experiments and SQL-driven analysis to optimize conversion and reliability, manage vendors/integrations, and ensure compliance (PCI, NACHA, OFAC). Report metrics and quantify feature ROI.

Lead design and delivery of cloud-native .NET services for a high-throughput trading platform. Own end-to-end systems, drive architecture and reliability, mentor engineers, participate in on-call and incident response, and occasionally contribute to React/TypeScript frontend work while establishing engineering standards and observability.

Lead development of automated API, UI, and end-to-end tests for a real-time trading platform. Extend AI-assisted test generation, build scalable CI/CD test frameworks for order lifecycles and market-data streams, reduce flakiness, triage failures, mentor engineers, and drive quality and testability across the product.

Own and resolve complex, recurring trader-impacting issues by reproducing, diagnosing, and shipping code fixes. Write backend C#/.NET and React front-end code, build admin tooling, improve observability, lead incident response and post-incident reviews, and partner across engineering, QA, Cloud Ops, and Product to reduce recurring support toil.

Build and own a framework-agnostic charting engine core and its React binding: rendering layers, real-time data plumbing, indicator math, drawing tools, performance (60fps) discipline, visual testing, architectural leadership, mentoring, and integrations across web and mobile.

Lead native iOS and Android product strategy and roadmap for a high-volume fintech app. Translate complex web trading, payments, and social features into mobile-optimized journeys, drive A/B tests to improve onboarding and retention, ensure performance and stability at scale, and align cross-functional teams to ship through CI/CD and feature-flag workflows using mobile analytics and SQL.