How to Hire a Frontend Engineer

Hiring a frontend engineer looks straightforward until you’re three interviews in and still can’t tell who’s actually good. Frontend work sits at an odd intersection: it’s judged by users on look and feel, but underneath there’s real engineering depth around state, performance, accessibility and maintainability. Getting this hire right means screening for both, not just one.

This guide covers what to look for, how to write a role that attracts the right people, and how to keep the process moving without cutting corners.

What good frontend engineers actually do

Strong frontend engineers aren’t just implementing designs. They’re making decisions about component architecture, state management, rendering performance, and how the interface behaves under real conditions like slow networks or large datasets. They think about accessibility as a default, not an afterthought, and they write code that other engineers can maintain.

Weaker candidates can still ship a polished-looking interface. The gap shows up later: brittle state logic, poor test coverage, components that don’t scale, or interfaces that break for users with different devices or assistive technology. This is why screening on portfolio alone is risky. A good demo doesn’t tell you how someone handles a messy codebase or a genuinely difficult product requirement.

What to screen for

A useful frontend screen covers three areas:

• UI/UX judgement. Can they explain trade-offs they made on a past project, not just describe what they built? Ask about a decision they’d reverse now.
• Engineering fundamentals. State management approach, testing strategy, performance considerations, how they handle accessibility. This is where the “engineer” half of the title gets tested. Most modern frontend teams build in TypeScript rather than plain JavaScript, so if that’s your stack, screen for it directly; see our dedicated guide to hiring TypeScript developers for what good looks like.
• Collaboration with the rest of the stack. Frontend engineers rarely work in isolation. Ask how they’ve worked with backend teams on API design or with designers on handoff.

A short, focused technical exercise, reviewed live rather than marked in isolation, tends to reveal more than a take-home task. It also respects the candidate’s time, which matters more than most hiring teams admit. If you’re building a wider engineering team alongside this hire, our software engineering recruitment approach applies the same screening logic across roles.

Writing the role so the right people apply

Vague job specs attract vague candidates. Be specific about the stack, the actual problems the person will solve in their first few months, and how much ownership they’ll have over frontend architecture decisions. If the role touches data-heavy interfaces or AI product features, say so explicitly. It’s a growing part of frontend work and worth flagging early; see our work in AI and data hiring, and the other industries we hire for, for how this shows up in practice.

Keep pay conversations honest. Candidates at every level want a straight answer on range. Rather than guessing, point them to our UK Tech Salary Report 2026 or full salary benchmarks for current data rather than quoting a figure you’re not confident in.

Moving fast without lowering the bar

Good frontend engineers, especially senior ones, don’t stay on the market long. A slow process loses candidates to competitors, not necessarily to counteroffers. The fix isn’t rushing the screen, it’s compressing everything around it: faster scheduling, quicker feedback loops, and a clear decision-maker who can move to offer without a fifth round of interviews.

This is where a recruiter who technically screens before you meet anyone saves real time. It means every candidate you see has already cleared a bar, so your interviews focus on fit and depth rather than filtering out weak applicants.

How we help

At OpenSource, every frontend candidate is screened by our founders before you meet them, covering both UI/UX judgement and engineering depth. Whether you need one senior hire or a full frontend team, our services range from retained search for critical roles to embedded recruitment for scaling teams and contingent recruitment for one-off hires. Browse current jobs or get in touch to talk through your next frontend hire.