Frontend Developer Job Description

Key skills

Responsibilities

• • Implement UI components from design specifications with high fidelity and pixel precision
• • Ensure all interfaces meet WCAG 2.1 AA accessibility standards
• • Optimize pages for Core Web Vitals — LCP, CLS, and INP
• • Write reusable, composable component libraries with clear APIs
• • Collaborate with designers to translate Figma or Sketch mockups into production code
• • Integrate with backend APIs and handle loading, error, and empty states gracefully
• • Set up and maintain frontend build tooling, linting, and formatting pipelines
• • Conduct UI-focused code reviews and mentor junior developers on browser fundamentals

Requirements

• • 3+ years building production frontend applications with a modern JavaScript framework
• • Deep understanding of the browser rendering pipeline and performance implications
• • Strong command of CSS including Flexbox, Grid, and responsive design
• • Experience consuming REST or GraphQL APIs from the client side
• • Solid understanding of web accessibility principles and ARIA patterns
• • Proven ability to collaborate effectively with visual designers

Nice to have

• • Experience building and publishing a shared component library or design system
• • Familiarity with server-side rendering frameworks like Next.js or Nuxt
• • Knowledge of web animation libraries (Framer Motion, GSAP)
• • Contributions to open-source frontend projects

What to look for in a great Frontend Developer

Look for candidates who treat accessibility and performance as non-negotiables, not add-ons. During interviews, strong frontend developers can explain what happens in the browser when a page loads — from DNS lookup to first paint — and discuss how their architectural choices affect that pipeline. They should demonstrate an eye for detail and know how to reconcile design intent with technical constraints. A genuine interest in the end-user experience, rather than purely the engineering puzzle, is a reliable indicator of long-term quality output.

Interview questions to ask a Frontend Developer

Ask the candidate to walk through how they would diagnose and fix a slow-loading page — this tests both performance knowledge and systematic thinking. Present a Figma mockup and ask how they would break it into components: look for decisions about abstraction levels and reusability. Include a live coding task around async data fetching with loading and error handling. Ask how they approach cross-browser compatibility issues. Finally, ask about a UI accessibility problem they've encountered and how they resolved it — this quickly separates developers who take accessibility seriously from those who treat it as compliance overhead.

Where to source Frontend Developers

CodePen, GitHub, and Dribbble (for developers with a design sensibility) are productive hunting grounds. Frontend-focused communities like the Vue or React subreddits, Discord servers, and local JavaScript meetups surface active practitioners. Look for candidates who maintain public projects or contribute to popular UI libraries — this demonstrates sustained interest beyond day jobs. Job boards that allow skills filtering such as LinkedIn and specialized tech boards help narrow the funnel. Async take-home challenges with a real, scoped UI task tend to reveal practical skill more reliably than abstract whiteboard questions.