Hld
System Design
Medium
Collaborative Virtual Whiteboard Engine
Design the backend for a real-time, infinite-canvas collaborative whiteboard (e.g., Miro/FigJam). It must support 1,000 concurrent users per board with sub-50ms latency for stroke synchronization. The system needs to handle object persistence, version history (undo/redo), and the ability to export the board as a high-resolution PDF at any moment.
Key concepts
websocketsoperational-transformationstateful-servicesconflict-resolution
Practise this out loud — free
Start a mock interview on THIS exact question — a voice AI interviewer opens with it, pushes back like a real onsite, then hands you an instant scorecard.
🎙 Practise this question now