Senior Frontend Engineer (Contractor)

📋 Description Design, develop, and deliver responsive UI using React, TypeScript, Material UI. Own features from design to deployment and improvement. Build complex forms with pixel-perfect UX across devices. Develop and maintain automated tests (unit/integration/e2e). Optimize performance, accessibility, and Core Web Vitals. Collaborate with product, design, and backend engineers. 🎯 Requirements Minimum 5 years of professional React experience. Strong expertise in TypeScript, React, Material UI v5+, Redux Toolkit, RTK Query. Advanced CSS knowledge (Flexbox, Grid, responsive/mobile-first). Experience with forms using React Hook Form. Proven testing experience (Jest, RTL, Cypress, Playwright or similar). Performance optimization know-how (lazy loading, code splitting, profiling). 🎁 Benefits Fully remote contractor opportunity based in Europe. Ownership of frontend feature development from start to finish. Work on a modern SaaS platform for mission-critical operations. Collaborative environment across engineering, product, design. AI-first engineering culture with cutting-edge tools. Influence frontend architecture and design systems.