Grinding problem sets
Hundreds of puzzles, no AI allowed, and no idea how an interviewer would score you. Then the real interview hands you an assistant and a codebase.
Rehearse the interview companies now run, with a real IDE, an AI assistant, and an AI interviewer that follows up. Then get a structured report on exactly what to sharpen.
The skills real interviewers score, measured every session.
Answer out loud. Your AI interviewer listens, transcribes, and comes back with the follow-up a sharp interviewer would ask, so you rehearse the conversation and not just the code.
“I'd put a queue in front of the notification service so a spike in sign-ups can't take down checkout, then drain the backlog with workers that scale on queue depth.”
Illustrative session
Interviews changed when AI landed on every engineer's desk. Most interview prep didn't.
Hundreds of puzzles, no AI allowed, and no idea how an interviewer would score you. Then the real interview hands you an assistant and a codebase.
Ship realistic work with an AI assistant in the loop, talk it through with an AI interviewer, and get scored on the skills hiring teams look for.
Three steps from first attempt to interview-ready.
Choose coding, system design, code review, behavioral, or a mixed round, and set the difficulty. You get a real IDE, a terminal, and an AI assistant: the tools you'd use at work.
# Task: per-user rate limiter for a public APIclass SlidingWindowLimiter:def allow(self, user_id: str) -> bool:now = time.monotonic()window = self._hits[user_id]while window and now - window[0] > self.period:Every session ends with a structured report: scores on the skills that round tests, the key moments that earned them, and the specific things to work on next.
Asked about burst size and per-user limits before writing any code.
Caught an off-by-one in the suggested window math and fixed it.
Didn't discuss behavior across multiple servers. Lead with it next time.
Every round feeds a running history for each competency, so you can see what's improving, what's slipping, and walk in knowing where you stand.
Up 21 points since your first session. Illustrative data.
Scores on the skills interviewers look for, with the notes behind every number, so you know exactly what to practice next.
5/8 skills assessed • 3 untested
FAQ
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