Senior Software Engineer, Frontend

About Companies Library Partners Resources Startup Jobs Log in Apply Respan Self-driving observability, evals, and gateway for AI agents Senior Software Engineer, Frontend $1 - $200K • Alameda, CA, US / Remote (IN) Job type Full-time Role Engineering, Frontend Experience 6+ years Visa US citizen/visa only Connect directly with founders of the best YC-funded startups. Apply to role › Raymond Huang Founder About the role What we’re building Respan is building the self-driving observability and evals platform for AI teams, used by 60+ YC companies and hundreds of AI teams. The role You will own the frontend architecture of Respan's platform: trace visualizers, eval dashboards, prompt editors, and the design system that ties it all together. This is a senior role with real architectural ownership. We are looking for someone who is opinionated about code quality, focused on performance, and can mentor the team on frontend best practices while still shipping fast. What you’ll do: Architect and build high-performance UI with React and Next.js Own the frontend architecture, component library, and design system Collaborate closely with design to ship pixel-perfect, accessible interfaces Mentor other engineers on frontend best practices and code quality Drive performance optimization across the platform UI What you must have: 5+ years of frontend engineering experience with TypeScript and React Deep knowledge of modern CSS, layout systems, and animation Strong opinions on code quality, testing, and component architecture Strong plus: Experience building complex data-heavy UIs such as dashboards, editors, or visualizers Track record of building and maintaining design systems Experience with performance profiling and optimization Contributions to open-source frontend projects or libraries About Respan Respan Founded: 2023 Batch: W24 Team Size: 15 Status: Active Location: San Francisco     Founders Raymond Huang   Founder Hanhe Li   Founder Similar Jobs chrt Frontend Engineer Jarmin Design Engineer Authologic Frontend Engineer (UI & Product-Focused) Splash Inc. Frontend Engineer (UI/UX) Dedalus Labs Design Engineer Flick Senior/Staff Frontend Engineer Dalus Senior Software/Frontend Engineer @ Germany Office Truss Design-Focused React Native Engineer Credal.ai Founding Frontend/UX Software Engineer Uplane Forward Deployed Engineer - Berlin Clinikally SDE 2 - Frontend Stacksync Senior Frontend Engineer, AI Product UX VectorShift Frontend Engineer (India) Coulomb AI Senior Frontend Developer Footer Y Combinator Make something people want. Programs YC Program Startup School Work at a Startup Co-Founder Matching Resources Startup Directory Startup Library Investors Demo Day Safe Hacker News Launch YC YC Deals Company YC Blog Contact Press People Careers Privacy Policy Notice at Collection Security Terms of Use Twitter Facebook Instagram LinkedIn Youtube © 2026 Y Combinator