Figma's Multiplayer Architecture: Scaling Real-Time Collaboration

Tech · 6 min read

Figma's real-time collaboration feels near-instant because of a layered architecture that separates operational transforms, presence, and persistence. The app applies CRDT-like approaches to vector and text edits while using a commit log to serialize changes for persistence. This allows multiple users to edit concurrently while ensuring the document converges to a consistent state across clients.

Performance optimizations include hierarchical diffing, viewport-focused network prioritization, and background chunking of non-visible assets. Figma streams only necessary state to each client and compresses history for efficient replay. Presence is lightweight, with avatars and selection outlines rendered locally based on deltas rather than full document snapshots, which keeps latency down even in large files.

From a product design perspective, Figma trades some immediacy in long undo histories for responsiveness during live sessions. The engineering team invests heavily in predictable conflict resolution and transparent UX for collaboration artifacts like shared cursors and comments. This teardown is instructive for teams building collaborative editors: optimize network usage around active viewport and prioritize intuitive conflict handling.