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

Senior Full-Stack Developer
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Location: Barcelona, Spain
Responsibilities
Develop and maintain cross‑platform interfaces using React.
Refactor and modernize components to improve speed, usability, and accessibility.
Complete cross-functional tasks 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 & UX with measurable outcomes such as Core Web Vitals, load times, and responsiveness.
Qualifications
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, and Maestro.
Ability to work independently, communicate clearly, and deliver end‑to‑end solutions.
Preferred Knowledge / Technical Stack
React Query (@tanstack/react-query): comfortable working with queries, mutations, caching, and existing API hooks.
Zustand: confident with global state management in an existing codebase.
Electron: familiarity with building and maintaining cross‑platform desktop applications. xhfqzwm
Native mobile development: experience with Kotlin and/or Swift.
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