Technical Screening Questions for Frontend Developers
Hire frontend engineers who can build beautiful, performant UIs. Use these 20 knockout questions to filter for framework knowledge, API integration skills, and testing experience.
Why Screening Frontend Developers is So Hard
Screening frontend developers is tough because their skills are a mix of art and science. A resume might list React, CSS, and TypeScript, but it can't tell you if they can build a responsive layout, manage complex state, or optimize for performance. Wasting an engineering manager's time on a candidate who doesn't understand the basics is a costly mistake. These questions help you verify foundational experience first.
What to Look For in a Frontend Developer
A strong frontend developer has a deep understanding of core web technologies (HTML, CSS, JS), expertise in at least one modern framework (like React), and experience working with APIs. Look for evidence of building responsive designs, writing tests, and collaborating with designers and backend engineers. For senior roles, experience with state management, performance optimization, and TypeScript are key indicators of advanced skill.
20 Knockout Questions for Frontend Developers
| # | Question | Type | Knockout Rule |
|---|---|---|---|
| 1 | How many years of frontend development experience do you have? | MCQ: 0-1 / 1-3 / 3-5 / 5+ | Below minimum = Knockout |
| 2 | Are you proficient in HTML, CSS, and JavaScript? | Yes / No | No = Hard Knockout |
| 3 | Have you worked with React.js professionally? | Yes / No | No = Knockout for React teams |
| 4 | Have you worked with any other frontend framework? | MCQ: Vue.js / Angular / Svelte / None | None = Red flag |
| 5 | Have you built responsive designs for mobile and desktop? | Yes / No | No = Knockout |
| 6 | Have you used TypeScript in a production project? | Yes / No | No = Knockout for TypeScript teams |
| 7 | Have you worked with REST APIs or GraphQL from the frontend? | Yes / No | No = Knockout |
| 8 | Have you used Git for version control in a team? | Yes / No | No = Hard Knockout |
| 9 | Have you written unit tests for frontend code? | Yes / No | No = Knockout for test-driven teams |
| 10 | Have you worked with CSS frameworks? | MCQ: Tailwind / Bootstrap / Material UI / None | None = Red flag |
| 11 | Have you optimized a website for performance or page speed? | Yes / No | No = Red flag for performance-focused roles |
| 12 | Have you integrated analytics or tracking tools? (GA, Mixpanel) | Yes / No | No = Red flag for growth-focused teams |
| 13 | Have you worked with state management tools? (Redux, Zustand, Pinia) | Yes / No | No = Knockout for complex frontend apps |
| 14 | Have you deployed frontend apps to cloud or CDN? (Vercel, Netlify, AWS) | Yes / No | No = Red flag |
| 15 | Have you worked in an Agile or Scrum team? | Yes / No | No = Red flag |
| 16 | Have you collaborated with UI/UX designers using Figma? | Yes / No | No = Red flag for design-heavy teams |
| 17 | Do you have a GitHub profile or portfolio you can share? | Yes / No | No = Red flag |
| 18 | What is your expected salary range? | MCQ: Range bands | Out of budget = Knockout |
| 19 | What is your current notice period? | MCQ: Immediate / 2 weeks / 1 month / 2+ months | Mismatch = Knockout |
| 20 | Are you available for an interview within the next 7 days? | Yes / No | No = Deprioritize |
"Asking about responsive design and TypeScript upfront is a simple filter that saves our frontend team from dozens of pointless first interviews."
- Engineering Manager, E-commerce Co
How to Use These Frontend Questions
Choose 3-5 of these questions that are most critical to your role. For a senior React position, you might prioritize questions about React, TypeScript, state management, and testing. Use these in a Sift quiz to create an automated first-pass filter. This frees up your senior engineers to conduct more in-depth technical interviews with a smaller, pre-vetted group of candidates.
Common Screening Mistakes
A frequent error is focusing too much on framework-specific trivia instead of core JavaScript and CSS fundamentals. Another is neglecting to screen for "soft" technical skills like experience with Git, testing, and collaborating with designers. A great frontend developer is more than just a framework expert; they are a well-rounded engineer who can build and maintain a quality product as part of a team.