Frontend Developer interview questions
Strong frontend interview questions cover the fundamentals frameworks sit on: CSS layout, browser behavior, accessibility, and performance budgets. Ask how they debugged a layout bug, made a feature accessible, and what they measure before calling a page fast.
What a frontend developer interview must assess
- →CSS fundamentals: layout systems, stacking, responsive strategy without a framework crutch
- →Accessibility as practice: keyboard, semantics, screen-reader testing
- →Performance: what they measure (Core Web Vitals) and how they fix it
- →Debugging: browser devtools fluency on someone else’s code
Sample frontend developer questions — and what to listen for
1. Tell me about the hardest layout or CSS bug you have fixed. How did you isolate it?
Listen for: Systematic devtools reduction — inspecting computed styles, stacking contexts, reflow behavior — instead of "I tried things until it worked".
2. How have you made a complex interactive feature accessible? What did you test with?
Listen for: Semantic elements first, ARIA only where needed, real keyboard and screen-reader passes — a concrete feature story, not "we ran a linter".
3. A page feels slow. Walk me through what you measure before you change any code.
Listen for: LCP/INP/CLS, network waterfall, JS bundle analysis, identifying the actual bottleneck — measurement before optimization.
Red flags
- ✕Cannot lay out a page without a component library
- ✕Accessibility = "we add alt tags"
- ✕Optimizes by habit ("lazy-load everything") without measuring
Generate the full frontend developer interview kit
Tuned questions for your specific opening — screening, behavioral, and technical, each with listen-for and red-flag notes, plus a weighted scorecard rubric. Paste your job description for best results — or generate the frontend developer job description first.
How it works
- 1
Describe the role
A one-line brief or the full job description — the questions are generated for THIS role, not from a generic bank.
- 2
Get the kit
Screening, behavioral (STAR), and technical questions — each with what a strong answer sounds like, the red flag, and a follow-up probe — plus a weighted scorecard rubric.
- 3
Ask or automate
Copy the kit as markdown for your interviews, or let the AI interviewer ask every candidate the same questions and score against the rubric.
Questions
What makes a good interview question?
It asks for past behavior ("tell me about a time…"), maps to a competency the role needs, and is asked to every candidate the same way. Decades of IO-psychology research show structured interviews predict job performance far better than unstructured conversation — hypotheticals and puzzles mostly measure confidence.
Is this interview question generator free?
Yes — no account, no email. Describe the role (or paste the job description) and you get the full kit: questions with listen-for and red-flag notes plus a weighted scorecard rubric, copyable as markdown.
How many interview questions should I ask?
In a 45–60 minute interview: 2–3 screening checks, 4–5 behavioral questions with follow-ups, and 4–6 role-specific probes is realistic. Fewer questions asked deeply beat many asked shallowly — the follow-up is where the signal lives.
Should every candidate get the same questions?
Yes — that is what "structured interview" means, and it is both more predictive and more defensible (EEOC/fairness). Same questions, same rubric, scores recorded per answer. It is exactly what the AI interviewer automates.