Summary: Join a client's team as a Senior Full-Stack Developer to develop and maintain cross-platform interfaces using React, refactor components, and drive architecture and code quality. Highlights: 1. Opportunity to grow in an innovative environment 2. Collaborate closely with a small, agile team 3. Take ownership of projects and features from concept to release 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