Get senior-ready for frontend interviews.
FrontEnd Coach runs realistic React, JavaScript, performance, and frontend system design interviews, then turns every answer into scored feedback, stronger rewrites, and a focused practice plan.
Question 2 of 5
Explain how you would diagnose a slow React dashboard after a release.
250+
frontend questions
6
feedback dimensions
7
interview categories
24/7
AI practice loop
How it works
A complete loop for deliberate interview practice.
FrontEnd Coach keeps the workflow tight: choose context, answer under pressure, then practice the precise concept that held you back.
Step 1
Choose the interview context
Pick role level, topics, timing, and optional CV or job-description context.
Step 2
Answer realistic prompts
Practice one question at a time in a workspace built for structured frontend answers.
Step 3
Drill the next weak spot
Turn rubric feedback into a focused follow-up session instead of guessing what to study.
Interview workspace
Practice in an environment that feels closer to the real loop.
Structured prompts, timing, voice input, and follow-ups help you rehearse how you actually need to think and communicate.
Live workspace
StreamingNext follow-up
What would you instrument first to prove the regression?
Your answer outline
Measure before optimizing with React Profiler and Web Vitals.
Split network, render, and JavaScript execution costs.
Ship budget checks in CI and monitor INP after release.
Timed pressure
Run quick drills or full mock interviews with realistic pacing.
Targeted follow-ups
The interviewer probes weak or incomplete answers before moving on.
Private practice context
CV context is optional and can be removed when you no longer need it.
AI feedback
See what a senior answer was missing.
A single score is not enough. The feedback view separates correctness, completeness, clarity, depth, trade-off thinking, and communication.
Answer score
3.2/5
Senior-level rewrite
Start by identifying whether the slowdown is network, JavaScript execution, render work, or layout. I would capture React Profiler commits, Core Web Vitals field data, bundle diff, and long-task traces, then prioritize fixes by user impact.
Weakness detection
Find the concepts quietly dragging down your interviews.
The dashboard turns multiple sessions into patterns, not isolated notes.
Weak areas
Current practice priorities
React performance
Needs work
Skipped memoization trade-offs and commit-duration evidence.
Web Performance
Needs work
Needs stronger INP, long-task, and CI budget explanation.
System design
Needs work
Missing API contracts and graceful degradation strategy.
Recommended next drill
Design a high-traffic product search page with strict latency goals, then explain measurement, fallback states, and release guardrails.
Preview a drillCV-based practice
Turn your own projects into interview material.
Upload a CV or paste experience notes, then practice questions grounded in the systems, trade-offs, and ownership you already claim.
Frontend Engineer
Checkout verification workflows, latency-sensitive review tools, React Query migration.
Senior project prompt
Tell me about a time you improved perceived performance under backend constraints.
AI-generated follow-up
Which metrics proved the migration helped users, and what trade-off would you call out to a staff engineer?
ATS-aware CV review
Get frontend-specific gaps, stronger bullet suggestions, keyword coverage, and clearer impact framing.
Question bank
Study from a bank built around frontend depth.
Browse explanations, diagrams, quizzes, and handbooks when you need to study before another mock session.
From question to concept
Save questions, read detailed notes, test recall, and return to spaced repetition when the topic is due.
Virtual DOM and Fiber
Explanation · diagram · quiz · flashcard
Core Web Vitals
Explanation · diagram · quiz · flashcard
Event loop and tasks
Explanation · diagram · quiz · flashcard
Autocomplete system design
Explanation · diagram · quiz · flashcard
Supported categories
Everything frontend interviews actually test.
Practice the fundamentals, the senior-level trade-offs, and the communication layer between them.
React rendering
JavaScript internals
Frontend system design
Web performance
Browser APIs
Testing strategy
Behavioral signals
CV project deep dives
Pricing
Start free. Upgrade when the prep loop is working.
No credit card to begin. Pro is for engineers who want unlimited sessions, history, and a complete study system.
Free
- 1 session per day
- Question bank access
- AI feedback
- Live component a11y audits
- Basic score breakdown
Pro
- Unlimited practice sessions
- Mock interview exam mode
- AI critique of your components
- Full history and answer replays
- Weak-area coaching dashboard
- CV and target-role practice
- Spaced repetition study plan
- Premium AI model
FAQ
Questions before you start.
Straight answers for engineers evaluating whether this belongs in their prep workflow.
Is this for senior frontend interview prep?
Yes. You can practice at junior, mid, or senior level, but the feedback is intentionally calibrated toward senior-level clarity, trade-offs, and systems thinking.
Can it tailor questions to my CV?
Yes. Upload or paste a CV, then decide per session whether that context should influence questions and follow-ups.
What does the AI feedback include?
Each answer receives dimension scores, missing points, technical corrections, improvement suggestions, and a stronger answer example.
What makes the coding challenges different?
Build & Critique challenges render your React component in a real browser sandbox and run an accessibility audit (axe-core) against the live DOM — the a11y report is free. Pro adds a senior AI critique grounded in those exact findings, plus re-render and component-API feedback. No other prep tool grades your running UI.
Can I use it without paying?
Yes. The free tier lets you start practicing, inspect the question bank, and get live accessibility audits on build challenges. Pro unlocks unlimited sessions, history, spaced repetition, deeper targeting, and AI critiques.
Prepare with a sharper loop
Walk into senior frontend interviews with better answers ready.
Start a free mock interview, identify the gaps, and turn your next practice session into targeted progress.