How HireDevelopers Vets React Developers — Our Internal Process
We screen 100 applicants to place 3. Here's exactly what our technical screening looks like for React developers.
Every developer on HireDevelopers' React roster has passed a five-stage screening that fewer than 3% of applicants complete. We're not proud of that number — we're proud of the developers it produces. Here's exactly what that process looks like.
Stage 1 — Application Review
We start with the basics: GitHub profile, portfolio, years of experience, and a short written explanation of the most complex React problem they've solved. Most applicants don't make it past this stage. Red flags at this stage include: no public code, a portfolio of only todo apps, or vague answers that suggest copy-pasted responses.
Stage 2 — Async Technical Test (72-hour window)
Candidates receive a real-world React task: build a paginated data table that fetches from a mock REST API, handles loading and error states, and supports live search filtering. The spec is deliberately underspecified — we want to see what they ask, what they assume, and what they decide.
We look for: clean component architecture, proper use of hooks, no unnecessary re-renders (we check with React DevTools profiling), accessible markup, and meaningful commit history. We don't care about pixel-perfect UI. We care about the decisions behind the code.
Common failure patterns at this stage: using `useEffect` for everything including derived state, no error boundary consideration, inline styles instead of consistent class-based styling, and a single 400-line component.
Stage 3 — Live Code Review Session (45 minutes)
A senior from our team joins a Zoom call and shares the candidate's submitted code. We don't ask them to defend it — we ask them to improve it. "If you had another 2 hours, what would you change and why?"
This session reveals more than any coding challenge. The best candidates immediately identify the same issues we found. They talk about performance implications, not just readability. They know the tradeoffs between controlled and uncontrolled components, when to lift state vs reach for context, and why they chose `React.memo` or didn't.
Stage 4 — System Design Discussion (30 minutes)
We ask the candidate to design a real-time collaborative document editor — roughly the complexity of a stripped-down Google Docs. We're not expecting a perfect answer. We're evaluating: do they think in terms of user experience first or technical constraints first? Do they reason about WebSocket vs polling? Can they articulate tradeoffs without prompting?
Senior React developers who've only worked on CRUD apps often struggle here. We're looking for breadth of thinking, not just depth in one area.
Stage 5 — Communication Assessment
The final stage isn't technical. It's a 20-minute conversation with our placement team, recorded with the candidate's consent. We ask: How do you handle a sprint where the design changes mid-way? How do you push back on a product requirement you think is technically unsound? What does "done" mean to you?
Remote developers spend most of their day communicating in writing. A developer who can't clearly explain a technical decision in Slack is a developer who will create confusion in a distributed team.
What a Good React Profile Looks Like
Our best placements share a few traits: they write TypeScript by default without being asked, they treat accessibility as a first-class concern, they're comfortable explaining performance profiling to a non-technical stakeholder, and they're honest about what they don't know. They also have opinions — and can defend them without being defensive.
If you'd like to hire a developer from this pool, we typically send 2–3 matching profiles within 24 hours of a requirement submission.