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Interview prep, written by engineers.

System design walkthroughs, behavioral technique, and honest writing about what these tools do and where they stop.

Design a URL shortener, diagrammed

The most-asked system design question, worked end to end — with the architecture drawn rather than described.

Interview performance and job competence are different skills. Here is what the research says about the gap, and the handful of things that close it.

Screen capture, system audio, and overlay windows — a technical look at what these tools do and what they cannot do.

STAR is what interviewers score against. It is also what makes candidates sound like they are reading. Both can be true.

We build an interview copilot. We also think the disclosure question deserves a straight answer rather than a paragraph buried in the terms.

Free plan, all three surfaces, no credit card.