Frontend Engineer | Multiple openings at startups where the UI is the product, not an afterthought

At TechTree, we match exceptional talent with the startups building the next wave of intelligent software and more. And right now, our pipeline is full.One application. We match you to the role that fits your background, language skills, and ambitions.The best frontends aren't built by people who follow designs. They're built by engineers who improve them. Here's what our partners are building.One is a San Francisco developer tools company, backed by top US angels and YC-connected founders, building AI-native products used by developers globally. They're offering $180k–$240k for a senior frontend engineer who treats the interface as a first-class engineering problem.Another is a London-based full-stack AI company where the frontend engineer owns the UX of real-time AI systems used in enterprise workflows.Live Frontend Roles On Our Board→ Senior Frontend Developer (San Francisco, on-site) — $180k–$240k + equity→ Full-Stack Engineer with frontend ownership (London) — £100k–£175k + equity→ Full Stack Engineer (Warsaw, Seed) — $75k–$150k + equity→ Product Engineer (Warsaw/Remote) — PLN 180k–300k + equityWhat You'll Be Working With→ React / Next.js TypeScript TailwindCSS Zustand→ Component systems you design, not inherit→ Users who notice the difference between good and great UI📍 Warsaw | Remote | London | San FranciscoWhat is TechTree?TechTree combines AI agents with a human support team to give candidates a better, more transparent hiring experience.Our AI Agent gets to know your background, experience, and what you're optimising for. It continuously matches you to live roles across our network where there's genuine alignment, not just keyword overlap.Our Human Team is there to support you through the process: Answer questions about roles, process, and next steps Add context when something in your background isn't obvious Help unblock stalled processes or unclear feedback Make sure you're not left guessing, ghosted, or wasting timeWe only post real jobs. Every role on TechTree is a live, active hire.If you apply: you'll be considered for this role, you may also be matched to other relevant roles, and if there's no fit, we won't spam you.