Flux — A Real-Time Collaboration Platform
Building a multiplayer editing experience that feels as natural as working side-by-side.
The Challenge
Modern work is collaborative, but most tools still feel like they were designed for solo use. Flux reimagines document editing as a truly multiplayer experience — where presence, cursors, and changes flow seamlessly across users.
Approach
We built Flux around three core principles:
Instant feedback. Every keystroke, cursor movement, and selection should sync in real-time. Latency kills collaboration.
Visible presence. Seeing who's in the document and what they're focused on creates natural coordination without explicit communication.
Conflict-free. Operational transforms ensure that simultaneous edits never corrupt the document state, no matter how complex the changes.
Technical Highlights
- WebSocket-based architecture with sub-50ms sync latency
- Custom CRDT implementation for distributed document state
- Optimistic UI updates with rollback for network failures
- Presence indicators with cursor tracking and selection highlights
Outcome
Flux reduced coordination overhead in team editing by 60% and increased active collaboration sessions by 3x compared to traditional document tools.
The product launched to 10,000+ users in the first month and continues to grow as a preferred tool for distributed teams.