Course contents

Module 01

The HLD interview

Start here. How a design round is run and scored, the step-by-step framework to deliver any design, and the estimation numbers you should know cold.

Free module1 topics4 pages4 ready

By the end of this module you can

  • Run a 45-minute design round with a clear structure
  • Turn a vague prompt into requirements and a scope
  • Do back-of-envelope maths without freezing

The round

What happens in the room and how to deliver a design step by step.

  1. How a system design interview worksLesson · 10 minMust knowFree
  2. The delivery framework: from prompt to deep divesLesson · 13 minMust knowFree
  3. Back-of-envelope estimationLesson · 12 minMust knowFree
  4. Common mistakes that sink design roundsLesson · 9 minMust knowFree