Interview Hero
AI mock interview

An AI mock interview that talks back.

Interview Hero is an AI mock interview you do out loud. Remy, the interviewer, asks the question, listens to your answer, reads your code or your whiteboard, and asks the follow-up — the way a person across the table would.

Coding · system design · behavioral25 – 45 minute roundsVoice to voice
Start free — 2 practicesSee the questions
What it tests

What an interview actually tests

  • Thinking out loud

    Interviewers score what they hear. Knowing the answer and saying it clearly, while someone waits, are different skills.

  • Handling the follow-up

    The first answer is rarely where the round is decided. It is the "why" after it, and what you say when pushed off your plan.

  • Keeping to time

    A real round has a clock. You need to finish, test, or land the story before the interviewer moves on.

How Remy runs it

Pick a round, talk it through, fix one thing.

  1. Pick the round

    Coding in a Python editor, system design on a whiteboard, or behavioral stories. Paste a job post and we suggest the mix.

  2. Talk it through

    Remy speaks first and the clock starts. She follows up on what you said, not on a script, and wraps up on time.

  3. Fix one thing

    The report picks one habit, quotes the moment it happened, and suggests what to say instead. Then you redo just that moment.

One thing to work onSample report

Say the trade-off before you start coding.

“I'll just use a hash map and sort it, it's probably fine.”11:40 · right before you started typing

Across the round
Try saying

“A heap keeps this at n log k. Sorting everything is simpler — I'll start there and say why it's fine for this input.”

Redo this momentJust this question, one more time
Talk it throughGo over the round with Remy
Went well at 02:05 — you restated the problem
Three kinds of rounds

Choose the round you need to practise.

Each round draws on the Interview Hero question library. A few examples from each:

  • Coding

    • In-memory rate limiter
    • Min stack
    • Run-length string compression
    All 17 coding questions

  • System design

    • Design a distributed rate limiter
    • Design a URL shortener
    • Design a social news feed
    All 10 system design questions

  • Behavioral

    • Ownership end to end
    • Disagree and commit
    • Customer impact
    All 12 behavioral questions
Questions

About AI mock interviews

How is an AI mock interview different from practising with a chatbot?

A chatbot waits for you to type and answers what you ask. Remy runs the round: she asks, listens, follows up on your answer, keeps the clock, and ends the interview.

Which kinds of interview can I practise?

Coding, system design and behavioral rounds. You can also combine them into a loop that mirrors your onsite.

Do I need a microphone?

Yes. The whole round is spoken, so you need a microphone and a quiet place. Headphones help Remy hear only you.

How long is one AI mock interview?

Coding rounds run 25 or 45 minutes, behavioral rounds 30 minutes, and system design rounds 45 minutes.

Keep going

Practice by round

Practice by company

Start an AI mock interview.

Your first two practices are free. No card needed.

Start free — 2 practices