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AI TypeScript interviewer
Generics, narrowing and utility types — practice explaining TypeScript beyond adding types to JavaScript.
Free 10-minute interview with a full report. Paid plans run full-length sessions.
TypeScript interview questions you might get
A sample of the starting questions. The live interview follows up on your answer, so no two sessions go the same way.
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What's the difference between `unknown` and `any`?
What it tests: Type safety.
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Write a generic function that returns a property of an object safely.
What it tests: Generics with keyof.
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How do discriminated unions help with exhaustive checks?
What it tests: Narrowing.
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Build a type that makes every nested property optional.
What it tests: Mapped types.
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When is a type assertion a code smell?
What it tests: Judgment.
How a session works
About 20–30 minutes from setup to report. End any time and you still get feedback on what was covered.
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Set your target
Pick a role, level and stack. Add a job description or your resume if you want questions about your real projects.
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Answer live
Speak or type. The interviewer follows up on thin answers, raises the difficulty when you're doing well and switches to code when it fits.
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Read the notes
A report scores every competency, quotes the answers that cost you, and gives you a prep plan for the next session.
A report that quotes you, not a pat on the back
Every score links back to something you actually said.
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Competency scores
Weighted to the role you picked, so a system design gap counts more for a senior backend role than for a frontend junior.
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STAR check on every story
See which part of each behavioral answer was missing — usually the Result.
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How you sounded
Filler words, hedging, "I" versus "we", and whether you cited real numbers — measured from your words, and compared between the first and second half of the interview.
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A prep plan
The two or three things to practice next, and a skill graph that tracks them across sessions.
Competencies — sample report
STAR — "Tell me about a missed deadline"
How you sounded
Questions
Frontend or backend?
Both. Add React or Node.js to your focus.
Will I write code?
Yes, coding questions accept TypeScript.
Is it for beginners?
Choose Junior for fundamentals.
Is it free to try?
Yes. Each month you get a free interview of up to 10 minutes with its scored report. Paid plans add full-length interviews, every track and the full 360 report.