Crystal Duck

Interview engineers the way they actually work.

Give candidates a hard problem and every tool, AI included. Get a graded review of the design and how they used AI.

Try a sample problem
Sample session review: candidate and position, overall grade, criterion scores and AI usage
Sample review

How it works

  1. Invite

    Pick a position and send an invite. The candidate gets one link and a short walkthrough.

  2. Session

    A timed workspace with canvas, API, entities and design notes, plus an AI assistant if you allow it.

  3. Review

    A rubric grade with the reasons, plus what the candidate asked the assistant and what they kept.