Senior Full-Stack Developer; React + React Native & TypeScript

Location

London, United Kingdom

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 an innovative environment, this could be the perfect fit for you.

• Develop and maintain 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 and design of our products and 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 a fair onboarding period.
• Improve performance and UX with measurable outcomes (Core Web Vitals, load times, responsiveness).

• Several years of production experience.
• Excellent Type Script skills (clean types, refactor-safe code).
• Solid experience with React and 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.
• Knowledge of or willingness 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.