Senior Frontend Engineer (Contractor)

📋 Description Design, implement responsive UIs with React, TS, and Material UI. Own features from design to deployment and improvement. Build complex forms with high UX quality. Develop automated tests for reliability (unit/integration/e2e). Optimize performance, accessibility, and Core Web Vitals. Collaborate with product/design/backend teams. 🎯 Requirements 5+ years building production React apps. TypeScript, React, Material UI v5+, Redux Toolkit, RTK Query. Modern CSS (Flexbox, Grid, responsive, mobile-first). Experience with React Hook Form; testing with Jest/RTL/Cypress/Playwright. Performance optimization: lazy loading, code splitting, profiling. Pixel-perfect from Figma designs; Git, Agile, Vite/Webpack. 🎁 Benefits Fully remote contractor in Europe. End-to-end ownership of frontend features. Work on a modern SaaS platform for mission-critical ops. Collaborative cross-functional environment. AI-first engineering culture and modern toolset. Influence frontend architecture and design systems.