React Jobs - April 2026

Arvo is building an AI meeting assistant for investment banking and private equity. Hiring a Founding Engineer to work closely with the founders across desktop, backend, and AI workflows. High-ownership role with significant influence on product, architecture…

We build AI phone agents for US healthcare — insurance claims, benefit verification, scheduling. 300K+ calls/month. Series A closed, R&D fully in Barcelona. Stack: Python, FastAPI, React/TypeScript. Small engineering team, fast pace, real ownership. Hiring fo…

BillionToOne is a molecular diagnostics company in Menlo Park, CA. Their software team builds products to detect prenatal genetic conditions non-invasively and to improve cancer treatment option discovery. They emphasize small teams with high ownership and ar…

Colonist is a multiplayer strategy game with millions of players. We're a small team and you'll own features end-to-end, from backend game logic to polished UI. You'll work on evolving our game architecture, ensuring cleaner code boundaries and better scalabi…

Lead the technical execution for a proprietary multi-agent AI platform that operationalizes the company's founder-story methodology. Architecture spec exists and parts are already in production; role requires translating the CEO's vision into technical specs,…

Chestnut builds systems for insurance carriers to run their distribution business, replacing spreadsheets and legacy systems with real-time data, deterministic workflows, and AI-assisted tooling. This is end-to-end product engineering: design schemas, build b…