From “I should practice” to a scored verdict.
One sitting, no scheduling. Here's the whole journey — what you do, what the interviewer does, and what you walk away with.
Before the round
~2 minutes — no scheduling, no human to wait forPick your round
DSA coding, low-level design, or system design — straight from the problem bank, or from the problem linked to the course chapter you just finished. Every problem is one the interviewer knows deeply, ground truth included.
DSA coding
Voice + shared page
Low-level design
Voice + shared page
System design
Voice + whiteboard
Set the bar
Choose the level you're interviewing for, L3 to Principal. The interviewer calibrates everything to it: how deep it probes, what it expects you to volunteer, and when a hint is earned versus handed over.
L3L4L5StaffPrincipalChoose your interviewer
Run it generic, or in the interviewing style of Amazon, Google, Meta, Stripe, Netflix, or Uber (paid plans) — pacing, follow-ups, and what “good” sounds like at that company. Scoring stays identical either way, so your progress numbers never lie.
GenericAmazonGoogleMetaStripe
In the round
30–45 minutes, fully voice-to-voiceAlex presents a problem you haven't seen
Your interviewer speaks, you speak back — put your headphones on. In DSA rounds it deliberately gives you no input/output examples: proposing your own is part of what's being graded, exactly like the real thing.
Clarify before you build
Jump straight into solving and the interviewer stops you. Clarifying questions come first — scale, constraints, edge cases — because that discipline is what real interviews actually test, and it's where most self-practice goes wrong.
Think out loud on the board or the page
System design gives you a whiteboard the interviewer watches live — it audits what you draw against the problem's ground truth and calls out what your mouth promised but your diagram didn't deliver. DSA and low-level design give you a shared page for notes, interfaces, code, and dry runs; there's no compiler on purpose — this measures reasoning, not IDE muscle memory.
Pushback, earned hints, and a real clock
It probes your trade-offs, challenges false confidence, and never hands over the answer. It also watches the time like a real interviewer — pacing the middle, warning near the end, and closing the round gracefully.
After the round
The part every other prep tool skipsA scored report, the moment you stop talking
Per-dimension scores, a seniority read (“reads as L5”), and the key moments that drove the verdict — including the ones where you caught your own mistake. Full transcript and your whiteboard included. Read a real report →
Close the gaps while they're fresh
Every report comes with follow-up questions the AI grades as you answer them, and an improvement plan that links each gap straight into the course chapter that fixes it. Stuck on a lesson? The AI tutor answers in place, and anything worth keeping goes to your notes.
Run it again. Measure the delta.
Retake the same problem next week and the report shows your movement on every dimension against the last attempt. Progress becomes a number you can watch, not a feeling you talk yourself into.
Your first round is two clicks away.
Two free mock interviews a month, on either round type. No scheduling, no credit card.
2 free mocks a month Start in ~2 minutes Scored like the real thing