Design a Real-Time Collaborative Document Editor with Concurrent Edits
Company: xAI
Role: Frontend Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Overview: A system design question for a frontend engineer: design a collaborative document editor where several people edit the same document at once and see each other's changes in near real time. It tests conflict resolution for concurrent edits, client-side state, the sync protocol, persistence and presence.