Frontend Engineers Who Care About What Ships to the Browser
React, Next.js and TypeScript engineers who understand bundle size, rendering strategy, accessibility and design-system discipline, not just how to make a component appear.
What should you look for when hiring a frontend engineer?
Beyond framework familiarity, look for judgement about what reaches the browser: rendering strategy and when server rendering matters, bundle size and dependency discipline, Core Web Vitals, accessible semantics and keyboard behaviour, and the ability to work inside a design system rather than against it. A strong frontend engineer also debugs across the network boundary rather than assuming the API is at fault. Anviam screens for these specifically, and provides engineers on a rolling monthly basis with onboarding in five to ten days.
- Time to onboard
- 5–10 business days
- Engagement models
- Full-time, part-time or project-based
- Minimum term
- 1 month, rolling
- Overlap hours
- 4+ hours with US, UK and AU time zones
- Trial period
- Two-week replacement window
- Reporting
- Direct access, your tools, your standups
Anyone Can Build the Component. Fewer Can Keep the Page Fast.
Building a component that renders correctly is table stakes. What distinguishes a strong frontend engineer is everything around it: recognising that a date library added for one format string just cost 70 kilobytes, that a list needs virtualising before it reaches a thousand rows, that a modal without focus trapping is unusable with a keyboard, and that a client-side fetch on a marketing page has made the content invisible to crawlers.
Those judgements compound. A codebase built by engineers who make them well stays fast and accessible as it grows; one built without them degrades steadily until a performance project becomes necessary. So we screen on specifics: what have you removed from a bundle, how did you find the layout shift, how do you test with a screen reader. Answers to those separate levels far more reliably than a framework checklist.
What Our Frontend Engineers Bring
These are the areas we screen on, in addition to framework fluency.
React & Next.js Depth
Component architecture, server and client component boundaries, and rendering strategy chosen deliberately.
TypeScript Discipline
Types that catch real errors rather than decorative annotations and escape hatches everywhere.
Performance & Core Web Vitals
Bundle analysis, code splitting, image strategy and fixing layout shift rather than tolerating it.
Accessibility in Practice
Semantic markup, focus management and keyboard paths, verified with a screen reader.
Design System Fluency
Building with tokens and shared components instead of one-off styles that fragment the UI.
Front-End Testing
Component tests plus Playwright coverage of the journeys where a regression would be costly.
Front-End Stacks We Staff
When to Hire a Dedicated Frontend Engineer
Design System Build-Out
Implementing a component library properly so the rest of the product can be built on it.
Performance Remediation
A slow application where Core Web Vitals are affecting both rankings and conversion.
Accessibility Compliance
A WCAG audit with findings that need real remediation rather than an overlay widget.
Framework Migration
Moving off AngularJS or jQuery incrementally without freezing product delivery.
Back-End-Heavy Teams
Strong server engineers with no dedicated front-end capability, so the UI always lags.
Shared Web and Mobile
Teams using React Native who want one engineer fluent across web and mobile front ends.
The Terms, in Writing
Most problems with contract engineering come from things nobody agreed in advance. These are ours, contractually, for every role.
Talk to Our Team- You interview every candidate and can decline anyone, with no pressure to accept a shortlist
- Engineers are our salaried employees, dedicated to you alone and never split across clients
- Replacement within two weeks at our cost if someone is not working out
- Rolling one-month term with 30 days' notice, no exit fee and no minimum contract length
- Code stays in your repository and your cloud accounts throughout the engagement
- Four or more hours of daily overlap with your working hours as standard
From Request to Contributing Engineer
Role Brief
A short call on the stack, seniority, domain and team context, then a written role summary.
Profiles Within 3–5 Days
Matched candidate profiles with real project history, not anonymised generic CVs.
You Interview
Technical and cultural interviews on your own process. Decline anyone, and we send more.
Onboard in 5–10 Days
Access, environment setup, codebase walkthrough and a first small ticket shipped in week one.
Work in Your Cadence
Your board, your standups, your review standards, reporting to your lead rather than to us.
Common Questions About Hiring Frontend Engineers
Should we hire a frontend engineer or a full stack developer?
Hire a dedicated frontend engineer when the interface is a significant part of the product's value: a design system, a data-dense application, demanding accessibility requirements or performance that affects revenue. Hire full stack when the team is small and handoff cost dominates, or when the front end is mostly forms over an API. If your existing team is strong server-side and the UI consistently lags, a frontend specialist is usually the higher-leverage hire.
How do you assess front-end skill beyond a framework quiz?
With a practical exercise in a real codebase plus specific questions about past work. We ask candidates to improve something measurable — reduce a bundle, fix a layout shift, make a component keyboard accessible — and we ask them to explain trade-offs rather than recite APIs. Questions about incidents they have actually handled separate levels quickly, because concrete recall is difficult to fake.
Can the engineer work with our existing design system or Figma files?
Yes, and reading the system before writing code is part of onboarding. Engineers implement against your tokens and existing components rather than introducing parallel styles, which is the main way design systems erode. Where the Figma files and the code have already drifted apart, we flag the discrepancies rather than silently picking one, since that decision belongs with your design lead.
Do your frontend engineers handle Core Web Vitals and SEO requirements?
Yes, and it is an explicit screening area. That covers rendering strategy so content is server-rendered where crawlers and AI agents need to see it, image and font loading, avoiding layout shift, and keeping JavaScript payloads proportionate. Engineers understand why a client-only rendered marketing page is an SEO problem rather than treating it as purely a technical preference.
Can we hire on a part-time or project basis?
Yes. Full-time dedicated is the most common arrangement and gives the best continuity, but part-time allocations work well for design system maintenance or ongoing accessibility work. Project-based fixed-scope engagements suit defined pieces such as a performance remediation or a framework migration phase. All three run on a rolling monthly term with 30 days' notice.
What seniority levels are available?
Mid-level through senior and lead. For a first dedicated front-end hire we usually recommend senior or lead, because early architectural decisions about state management, component boundaries and rendering strategy are expensive to reverse. Mid-level engineers work well alongside an existing senior who sets direction. We will say which we think fits your situation and why rather than proposing the most expensive option by default.