Practice interviews that feel like the real loop
An adaptive interviewer reads your resume, asks follow-ups, and scores you on STAR.
Practice loops modeled on interviews at
180ms
Voice latency
Real-time, lag-free conversations
STAR
Behavioral rubric
Granular STAR framework evaluation
24/7
On-demand loops
Unlimited practice without scheduling
Platform
Everything you need to practice like it's the real thing
Real-time simulation, structured analytics, and feedback you can act on — in one place.
Adaptive interviewer
It doesn't read from a script. Answers are analyzed live and probed with follow-up loops.
Interviewer
Why did you choose PostgreSQL over DynamoDB for that scale?
You
Relational transaction data with strong ACID guarantees…
Interviewer
How did you handle partition locks under high concurrent writes?
Voice mode
Natural voice-to-voice practice. No typing, no waiting — just conversation.
Resume-tailored questions
Upload your resume and target role. Questions map to your actual experience.
Performance analytics
Pacing, filler words, clarity, and STAR completeness — tracked across every session.
Built-in code editor
Write and run code while talking through your approach. Structure and edge cases count.
function binarySearch(arr, x) {
let l = 0, r = arr.length - 1;
while (l <= r) {
const mid = Math.floor((l + r) / 2);
}
}
On-demand rounds
Practice at 2am if you want. No scheduling, no calendars, no waiting for a partner.
Practice session
Ready nowHow it works
Four steps to interview confidence
Upload & analyze
Drop your resume and job description. We map your experience to the role and find the gaps before you start.
Voice interview
Talk it through out loud. Questions adapt to your answers and probe deeper, like a real interviewer.
Live coding
Solve problems in the built-in editor while explaining your approach. Process counts, not just the answer.
Instant feedback
A detailed scorecard with specific improvements — know exactly what to fix before the real thing.
Reports
Feedback that actually helps
No vague “you did great.” After every session you get a marked-up transcript: STAR on the answer, fillers with timestamps, and one thing to change next time.
Senior Software Engineer
Behavioral · STAR
Question 3 of 4 · Invalidation
How did you handle cache invalidation when the underlying records changed?
Your answer
Follow-up on the Redis TTL. Stale reads after writes.
Invalidate on write without blowing the hit rate.
Keyed cache by record id. Writes delete the key; reads refill.
Stale window dropped from 30s to one request.
STAR on the answer
Situation through Result, tagged on what you actually said — so you can see where the story broke.
Speech with timestamps
Fillers, pacing, and volume tied to the moment they happened. Not a summary score at the bottom.
One next move
The change that would have raised this score. Not a wall of advice.
Comparison
How it compares to the usual prep
| Feature | Friends | LeetCode | RoundZero |
|---|---|---|---|
| Available 24/7 | |||
| Voice-based practice | |||
| Personalized to your resume | |||
| Real-time follow-up questions | |||
| Detailed feedback & scoring | |||
| Behavioral + technical | |||
| No scheduling needed | |||
| Tracks improvement over time |
Audio samples
Hear a session
Short clips from real practice loops — the interviewer, a deep-dive, and the feedback that follows.
Behavioral round
Conflict resolution & leadership
Technical deep-dive
System design discussion
Feedback review
Scorecard walkthrough
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Perfect for getting a feel of RoundZero.
- 2 AI Mock Interviews per month
- Basic feedback & scoring
- System design problems
- Community support
For serious candidates ready to land offers.
- 20 AI Mock Interviews per month
- Advanced scoring & gap analysis
- System design problems
- Analytics PDF export
- Priority email support
The ultimate edge for senior engineering roles.
- Unlimited AI Mock Interviews
- System design problems
- Advanced analytics exports
- Targeted drills & custom libraries
- Dedicated success manager