Summary: Join a client's agile team as a Senior Full-Stack Developer to develop and modernize cross-platform interfaces using React, focusing on performance and user experience. Highlights: 1. Develop and maintain cross-platform interfaces using React 2. Drive architecture and code quality from concept to release 3. Improve performance & UX with measurable outcomes At TechBiz Global, we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a **Senior Full\-Stack Developer** to join one of our **clients**' teams. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you. What you’ll do: * Develop and maintain our cross\-platform interfaces using React * Refactor and modernize components to improve speed, usability and accessibility * Use a diverse set of skills to improve and optimize the performance \& design of our products \& interfaces * Collaborate closely with a small, agile team * Take ownership of projects and features from concept to release * Drive architecture and code quality (patterns, refactoring, maintainability) * Be ready to contribute quickly after an fair onboarding period * Improve performance \& UX with measurable outcomes (Core Web Vitals, load times, responsiveness) **What we’re looking for:** * Several years of production experience * Excellent TypeScript skills (clean types, refactor\-safe code) * Solid experience with React \& React Native, especially hooks and modern component patterns * Understanding of responsive design and accessible web development * Knowledge of performance optimization, accessibility best practices, and (testing) tools such as Vitest, Playwright, Maestro * Ability to work independently, communicate clearly, and deliver end\-to\-end **Know or be ready to learn:** * React Query (@tanstack/react\-query): comfortable working with queries, mutations, caching, and existing API hooks * Zustand: able to work confidently with global state in an existing codebase * Electron: familiar with building/maintaining cross\-platform desktop apps * Native mobile development: experience with Kotlin and/or Swift