Senior Full Stack Engineer (JavaScript/TypeScript)

About Rumi Rumi is building a more transparent and authentic writing and learning environment for the AI era. We help institutions guide AI use at the assignment level, supporting learning-focused workflows instead of blanket enforcement. The role Join our engineering team to architect a real-time, transparent writing environment. You’ll build end-to-end features—from high-performance frontends to robust backend services—delivering a seamless experience for classrooms at scale. What you’ll do Ship full-stack product features in a JS/TS stack (React + Node.js) Design APIs, data models, and backend services that are reliable and scalable Build responsive, fast UI experiences that feel great in real-time workflows Improve system observability, performance, and reliability (metrics, tracing, on-call as needed) Collaborate with product/design to turn educator needs into usable features What we’re looking for 5+ years professional experience in JS/TS (Node.js + React) Strong product sense: you care about UX, adoption, and iterative shipping Experience building reliable systems (testing, CI/CD, monitoring, performance) Ability to work across frontend and backend without handoffs Clear communication and comfort making technical tradeoffs Nice to have Cloud experience with GCP and/or AWS (deployments, managed services, observability) Postgres, Redis, queues, or event-driven architectures Work in education, compliance/privacy-adjacent environments, or B2B SaaS Benefits Competitive salary Comprehensive health insurance 15 days PTO annually Flexible working hours Redwood City office (in-person preferred; remote possible) Professional development support