System designHardsd-p099

Subject Storage cdnLevel Senior~45 minCommon in Storage & CDN interviewsIndustries Technology, Software development

Question

Design a code-hosting and collaboration service (like GitHub): host git repositories, support pull requests and code review, and trigger CI on changes.

What a strong answer looks like

Clarify scale and constraints first. Propose a clean component breakdown, then go deep on the hard parts — data model, bottlenecks, consistency, failure modes — and name the trade-offs you are making.

Learn the concepts

Narrate your design

Loading whiteboard…

Run or narrate your approach, then ask the coach.