50K+ concurrent usersDevelopment Visit Live Site

Real-Time Collaboration Tool

Multiplayer editing with conflict-free sync, presence, version history, and offline support.

collab.rufsan.dev
50K+
Concurrent Users
< 80ms
Sync Latency
0
Data Conflicts
99.99%
Reliability

The Challenge

Concurrent edits from thousands of users without conflicts. Sub-100ms sync. Offline reconciliation.

The Solution

1

CRDT-based conflict resolution for eventual consistency

2

Redis Pub/Sub across 6-node cluster

3

Optimistic UI with server reconciliation

4

Service Worker offline queue with CRDT merge

// Tech Stack

Built With

Next.js
WebSocket
CRDT
MongoDB
Redis Pub/Sub
Service Workers
TypeScript
Docker
// Results

Impact

50K+ concurrent users with sub-80ms latency. Zero conflicts. 99.99% sync reliability.

// More

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