Interview Simulation

System Design Interview Simulation

Practice architecture the way interviews actually run. Choose a scenario, place components and wire the data flow, then get structured feedback.

42 scenarios

Scenarios

42/42

System design interview guide

Practise the decisions behind the diagram, not just the boxes

There is rarely one correct architecture in a system design interview. The interviewer is watching how you clarify an ambiguous brief, make the request flow concrete, and choose trade-offs when scale or failure changes the problem.

A useful interview sequence

  1. 1. Clarify the user, the success metric, and the constraints that actually matter.
  2. 2. Draw the request path; make data ownership and asynchronous work explicit.
  3. 3. Defend the trade-off you chose under scale, latency, and partial failure.

Start with a free scenario

Read the brief, make your assumptions, connect the architecture on the canvas, then see which decisions the review found missing.