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System design

System design interview whiteboard

A shared Excalidraw board with services, databases, caches and queues ready to drag in. Live cursors for both sides, private notes for you.

See the demo

How it works

An Excalidraw board for both of you. Services, databases, caches, queues and the rest are a shape library; draw freely around them. Cursors and edits are live.

Send the candidate one link. They open it in a browser: no account, no install. You keep private notes beside the session and save it as a PDF at the end.

  • excalidraw
  • shape library
  • live cursors
Interviewer
Candidate

Combine it with other formats

A session can hold several formats as tabs, so one link covers the whole interview.