Frontend Engineer React, 3 months contract(remote Europe)

This contract role is ideal for a senior frontend engineer based in Europe who has strong React expertise, values clean architecture and excellent user experience, and is comfortable working autonomously in a high-scale fintech environment—someone who enjoys designing scalable frontend systems, collaborating closely with backend teams via REST APIs, optimizing performance, and occasionally handling Node.js BFF or SSR tasks within an agile, product-focused team on a short-term B2B engagement.

1. What attracts you to this 3-month React contract with Revolgy’s fintech client?
   I like focused, high-impact engagements where I can quickly add value. This role fits my experience with complex, data-heavy UIs in fintech, and I’m comfortable jumping into an existing codebase, shipping improvements fast, and leaving the team with cleaner architecture and reusable components when the contract ends.

2. Describe your experience architecting React applications at scale.
   I’ve led front-end architecture on React/TypeScript projects using feature-based folder structures, clear separation of UI and domain logic, and state management via tools like Redux/RTK or React Query. I standardize patterns for data fetching, error handling, and layout, and rely on reusable primitives and a shared component library to keep the codebase consistent and scalable.

3. How do you typically integrate with RESTful APIs from the frontend?
   I centralize API access in a thin client layer, handling base URLs, auth headers, and error normalization in one place. On top of that I use tools like React Query or SWR for caching, revalidation, and request deduplication. Each UI feature consumes strongly typed hooks, with clear loading, error, and empty states represented in the components.

4. What’s your experience with Backend-for-Frontend (BFF) and Node.js?
   I’ve implemented BFF services in Node.js/TypeScript to tailor backend data to frontend needs, aggregate multiple services, and handle concerns like auth, rate limiting, and SSR. This keeps the frontend simpler and reduces over-fetching. I’m comfortable setting up lightweight Express/Fastify servers and integrating them into existing infrastructure.

5. How do you ensure high performance and smooth UX in React applications?
   I minimize unnecessary re-renders using memoization, proper component boundaries, and suspense-friendly data fetching. I lazy-load routes and heavy components, optimize bundles, and pay attention to list rendering and perceived performance (skeletal loaders, optimistic updates). I also monitor performance with browser dev tools and metrics like FCP and TTI.

6. What is your approach to testing frontend code (unit, integration, E2E)?
   I use Jest and Testing Library for unit and integration tests focused on user behavior rather than implementation details. For critical flows I add Cypress or Playwright E2E tests that run in CI. I aim for a pragmatic balance: core business logic, critical user journeys, and regression-prone components get the strongest coverage.

7. How do you handle state management in medium-to-large React apps?
   I try to keep state local where possible and avoid global stores by default. For server state I prefer React Query or similar; for shared client state I use Context, Zustand, or Redux depending on complexity. I clearly separate view state (UI) from domain state and avoid mixing fetch logic directly into presentational components.

8. Describe how you collaborate in a remote, agile team as a senior engineer.
   I communicate frequently and asynchronously: clear written updates, concise PRs, and proactive Slack/issue comments. In stand-ups and refinements I help shape tickets, estimate realistically, and surface risks early. I regularly review code, share patterns, and step in to unblock others, while staying very execution-focused given the 3-month timeline.

9. Can you give an example of improving an existing frontend codebase within a short engagement?
   In a previous contract I joined a team with a large React app suffering from slow pages and duplicated logic. In about three months, I introduced a small design system, consolidated fetch logic into React Query, removed a lot of dead code, and refactored a few critical flows into reusable components, which reduced bundle size and improved page load and developer productivity.

10. Are you able to work remotely on a B2B basis within European time zones, and how do you manage your time and availability?
    Yes, I’m set up for fully remote B2B work in Europe and I overlap comfortably with CET/EET hours. I keep a consistent schedule, block focus time for deep work, and remain responsive on agreed channels. I share a simple weekly plan with my team and adjust quickly if priorities shift, so expectations and delivery stay aligned.

This position is a strong match for a senior React frontend engineer based in Europe who wants a 3-month remote B2B contract owning the architecture and development of a high-scale fintech UI—designing reusable React component systems, integrating RESTful APIs, optimizing performance across devices, and occasionally implementing Backend-for-Frontend logic in Node.js, while driving code quality with Jest/Cypress/RTL as a senior voice in an agile product team.