Remote: Senior Frontend/Full-Stack Engineer React + TS Leader

Upstart is seeking a Senior Software Engineer to own large frontend and full-stack initiatives using React and TypeScript. You’ll shape architecture, plan multi-month roadmaps, and work closely with product, design, and backend engineers to build scalable, high-quality borrower experiences. You’ll mentor peers, drive performance, accessibility, and testing, and explore applying AI to improve development workflows and product capabilities. Remote role in the U.S.