Real-time Systems Engineering
We build real-time systems that power live messaging, notifications, and collaborative features for millions of concurrent users.
Our Expertise
- WebSocket architecture - Millions of concurrent connections
- Message delivery - Guaranteed delivery with acknowledgments
- Presence systems - Online/offline status at scale
- Push notifications - Cross-platform notification delivery
- Live collaboration - Real-time document editing and shared state
Proven at Scale
Our real-time systems serve millions of users:
- 5.8M daily active users on Grindr messaging platform
- Sub-second message delivery globally
- 99.99% message delivery rate
- Real-time location updates for millions of users
Architecture Patterns
WebSocket clusters - Horizontal scaling for connections
Message queues - Reliable delivery with Redis/RabbitMQ
Presence tracking - Distributed state management
Fallback strategies - Long polling when WebSockets unavailable
Technologies We Use
- WebSockets (Socket.io, native)
- Redis Pub/Sub
- RabbitMQ / Kafka
- Firebase Cloud Messaging
- Ably, Pusher for managed solutions
