Senior Full-Stack Developer (React + React Native & TypeScript)

Location

London, United Kingdom

About the Role

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.

Responsibilities

• 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).

Qualifications

• Several years of production experience.
• Excellent TypeScript 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.

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