Interview prep that goes as deep as the interview does.
Coding patterns, system design, AI engineering, forward-deployed case work, behavioral, cloud and DevOps, and CFA Level 1 — seven tracks worked end to end, not a wall of unsorted problems. Pick one below to get started.
Seven tracks, each worked properly
How it works
Coding, system design, AI engineering, forward-deployed, behavioral, DevOps or CFA Level 1 — start with the one your next interview or exam is actually testing.
A real test runner for code, a method for design and behavioral — not a solution to read, a problem to actually solve first.
Spaced repetition resurfaces what you solved right when you're about to forget it, so the second pass takes minutes, not a redo.
Built differently on purpose
Company chips on real exercises, sourced from public interview write-ups — so you know a rate limiter or a system-design round isn't hypothetical.
Solve something once and it comes back exactly when you're about to forget it — the review queue is the same page every day, not a separate tool.
Sign up once and every solved problem, note and review date is tied to your account — open it on another machine and it's all still there.