Screening checklist
Frontend Developer Screening Checklist
Evaluate frontend developer candidates with this screening checklist covering JavaScript, React, CSS, accessibility, performance, and scoring criteria.
The short answer
Screening Frontend Developer candidates well means fixing the pass criteria before the first résumé is opened. The checklist below covers résumé triage, a short phone screen with model answers, a technical check with passing criteria, and the deal-breakers that end a conversation early.
- Must have: Expert-level JavaScript or TypeScript skills including async programming, closures, and ES6+ features
- Must have: Production experience with React, Vue, or Angular including state management solutions
- Must have: Strong CSS skills including Flexbox, Grid, animations, and CSS-in-JS or utility-first approaches
- Deal-breaker: Cannot demonstrate fundamental JavaScript knowledge or explain core language concepts
Cohesyve scores every applicant against a role-specific assessment. Ten candidates free, no card.
Frontend developers bring products to life by building the interfaces users interact with every day. Screening for this role demands evaluating proficiency in modern JavaScript frameworks, CSS mastery, performance optimization, and accessibility awareness. This checklist helps you systematically assess candidates who can deliver fast, responsive, and user-friendly web experiences.
Résumé screening
- Minimum two years of professional frontend development experience
- Proficiency in modern JavaScript or TypeScript and at least one major framework such as React, Vue, or Angular
- Strong knowledge of HTML5, CSS3, and responsive design principles
- Experience with frontend build tools and bundlers like Webpack, Vite, or Rollup
- Familiarity with frontend testing frameworks such as Jest, React Testing Library, or Cypress
- Portfolio or GitHub profile demonstrating frontend projects with clean code and modern practices
Must-have qualifications
- Expert-level JavaScript or TypeScript skills including async programming, closures, and ES6+ features
- Production experience with React, Vue, or Angular including state management solutions
- Strong CSS skills including Flexbox, Grid, animations, and CSS-in-JS or utility-first approaches
- Understanding of web accessibility standards and semantic HTML
- Experience with RESTful APIs and integrating frontend applications with backend services
Phone screen questions
Ask every candidate the same set, in the same order, and note the answer against the model before you form a view.
Tell me about a complex UI feature you built recently. What were the technical challenges?
A strong answer The candidate should describe the feature, the technical challenges encountered such as performance, state management, or cross-browser compatibility, their approach to solving them, and the final result. They should demonstrate depth of frontend knowledge and problem-solving ability.
How do you approach performance optimization for a frontend application?
A strong answer A strong answer covers identifying bottlenecks using profiling tools, optimizing bundle size through code splitting and tree shaking, reducing render cycles, implementing lazy loading, caching strategies, and measuring performance with metrics like Core Web Vitals.
Describe your experience with accessibility in web applications.
A strong answer The candidate should reference WCAG guidelines, ARIA attributes, keyboard navigation, screen reader testing, color contrast requirements, and semantic HTML. They should demonstrate that accessibility is part of their development process rather than an afterthought.
How do you manage state in a large frontend application?
A strong answer The candidate should discuss different state management approaches such as React Context, Redux, Zustand, or Vuex, explain when each is appropriate, and describe how they handle local versus global state. They should demonstrate pragmatism in choosing the right tool for the complexity of the problem.
What is your approach to writing and maintaining frontend tests?
A strong answer The candidate should describe a testing strategy that includes unit tests for utilities and components, integration tests for user flows, and end-to-end tests for critical paths. They should mention the testing tools they prefer and how they balance coverage with test maintenance effort.
Cohesyve
Let the screen run itself
Cohesyve puts a Frontend Developer assessment between the application and the phone screen, so the calls you make are with people who have already cleared the bar above.
Technical screening
| Area | What to test | Passing criteria |
|---|---|---|
| JavaScript and Framework Proficiency | Present a coding exercise that requires building a small interactive component using the candidate preferred framework. Evaluate code structure, state management, and best practices. | The candidate writes clean, idiomatic code with proper component decomposition, effective state management, and appropriate use of framework features. They handle edge cases and explain their architectural decisions. |
| CSS and Layout | Provide a design mockup and ask the candidate to implement it as pixel-perfect responsive HTML and CSS within a timed session. | The implementation matches the design, is responsive across breakpoints, uses semantic HTML, and employs modern CSS techniques. The candidate demonstrates efficiency and attention to detail. |
| Performance and Optimization | Present a slow frontend application and ask the candidate to identify performance issues and implement optimizations. | The candidate identifies key performance bottlenecks such as unnecessary re-renders, large bundle size, or layout thrashing. They implement effective optimizations and explain the performance impact of each change. |
| Testing and Quality | Ask the candidate to write tests for a provided component covering rendering, user interactions, and edge cases. | Tests are well-structured, cover meaningful scenarios, use appropriate assertions, and follow testing best practices. The candidate explains their testing strategy and choice of test types. |
Fit and deal-breakers
Good signs
- Shows passion for building polished user experiences and attention to design detail
- Demonstrates willingness to collaborate with designers, backend developers, and product managers
- Keeps up with evolving frontend ecosystem and shares knowledge with teammates
- Writes clean, documented code and values code review as a learning opportunity
- Exhibits empathy for end users and advocates for accessibility and usability
Deal-breakers
- Cannot demonstrate fundamental JavaScript knowledge or explain core language concepts
- Shows no awareness of accessibility requirements or dismisses them as unimportant
- Lacks experience with modern frontend tooling and development workflows
- Produces messy, unstructured code with no regard for maintainability or conventions
Scoring rubric
Technical Proficiency
35%- Demonstrates strong JavaScript or TypeScript skills and deep framework knowledge
- Writes clean, maintainable code with proper component architecture
- Shows mastery of CSS including responsive design and modern layout techniques
Performance and Quality
25%- Identifies and resolves performance bottlenecks in frontend applications
- Writes comprehensive tests and maintains high code quality standards
- Understands and implements web accessibility standards
Problem Solving
20%- Breaks down complex UI requirements into manageable implementation steps
- Makes thoughtful architectural decisions considering trade-offs
- Debugs issues efficiently and communicates solutions clearly
Collaboration and Culture
20%- Works effectively with designers, backend developers, and product stakeholders
- Participates constructively in code reviews and knowledge sharing
- Aligns with team practices and contributes positively to engineering culture
Common questions
Should we screen for a specific frontend framework like React or evaluate general JavaScript skills?
Prioritize strong core JavaScript fundamentals since a developer with deep language knowledge can pick up any framework quickly. However, if your team uses a specific framework heavily, verify basic proficiency in it to reduce onboarding time.
How important is CSS skill for frontend developer candidates?
CSS skill is very important and often underestimated in screening. A developer who cannot write efficient, responsive CSS will struggle with real-world UI implementation. Include a layout challenge in your technical screening to assess this capability directly.
Should frontend developers be expected to have design skills?
Frontend developers do not need to be designers, but they should have a strong eye for detail, understand basic design principles, and be able to implement designs faithfully. The ability to spot inconsistencies and communicate effectively with designers is more important than design creation skills.
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