Senior Frontend Engineer - React.js/TypeScript

Senior Frontend Engineer :

Stack :

React 19 / Vite / TypeScript / PWA

Role summary :

You build and own the user-facing application: fast, accessible, installable, and reliable, including offline scenarios.

Responsibilities :

• Develop and maintain the web client using React 19, TypeScript, and Vite.
• Implement Progressive Web App features: service workers, caching strategies, offline support, installability, push notifications where relevant.
• Consume GraphQL APIs efficiently (e.g., Apollo Client or urql), with sound state and cache management.
• Build a reusable, accessible (WCAG) component library and maintain design consistency.
• Optimize performance (bundle size, Core Web Vitals, rendering behavior).
• Write unit, component, and end-to-end tests; collaborate with QA on automation.
• Participate in code reviews and mentor less experienced engineers.
• Collaborate with the Solution Architect, backend engineers, and designers on technical approach.

Requirements :

• 5+ years of frontend development, with strong production experience in React and TypeScript.
• Hands-on experience with Vite and modern build tooling.
• Practical PWA experience (service workers, Workbox, manifest, offline strategies).
• Experience with GraphQL clients and client-side state management.
• Strong grasp of HTML/CSS, responsive design, and accessibility.
• Experience with testing tools (Vitest/Jest, React Testing Library, Playwright/Cypress).
• Familiarity with Git workflows and CI pipelines.

Nice to have :

• Experience with React 19 features (Actions, use, Server Components concepts, the React Compiler).
• Data visualization experience.
• Frontend security and performance monitoring experience.