Senior Frontend Engineer
First seen by Alion on Oct 7, 2026.
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.
Skills
TypeScript, GraphQL, HTML, CSS, React.js, Progressive Web App, UI