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FE System DesignAdvanced55 minutes
Collaborative Whiteboard
Design a real-time collaborative whiteboard with CRDTs, presence, undo/redo, and large-session performance.
LLM-friendly summary
An advanced collaborative frontend system design challenge about CRDTs, presence, large canvases, and multi-user consistency.
Scenario
A collaborative canvas product must support multiple simultaneous editors, smooth local interactions, and safe sync under packet loss.
What you need to design
- 1Choose a collaboration model such as CRDTs or OT.
- 2Handle cursor presence and latency masking.
- 3Support undo and redo in a multi-user environment.
- 4Keep rendering smooth on large boards.
- 5Plan for observability and failure recovery.
Concepts
CRDTsPresenceUndo/RedoLatency Masking
Skills
Collaborative SystemsCanvas PerformanceState Synchronization
What good solutions are evaluated on
- - Collaboration protocol and merge strategy
- - Performance and rendering quality
- - Presence and interaction design
- - Recovery and consistency trade-offs
Ready to practice this yourself?
Open the interactive AlgoReason workspace to sketch the architecture, write notes, and submit for AI evaluation.