Project Detail
NebulaRealtime
Production-grade real-time multiplayer backend with horizontally scalable WebSocket servers, Redis coordination, matchmaking, and authoritative simulation. Load-tested to ~96K req/s across instances.
Technical Summary
StackNode.js + TypeScript
Platformserver, distributed
RoleBackend / Systems Engineer
TechnologiesNode.js, TypeScript, Fastify, WebSocket, Redis, PostgreSQL, BullMQ, Docker, Prometheus
ContextPersonal Project
Team Size1
Key Responsibilities
- Designed and implemented full WebSocket scaling architecture
- Built matchmaking, presence, and leaderboard systems
- Integrated PostgreSQL persistence with BullMQ workers
- Load-tested and hardened for production deployment
Project Insights
Built and scaled a real-time multiplayer infrastructure with WebSocket horizontal scaling, server-authoritative simulation, and comprehensive observability
Technical Concepts
- Horizontally scalable WebSocket architecture with Redis Pub/Sub coordination
- Server-authoritative game simulation preventing client-side cheating
- Distributed matchmaking with presence tracking across instances
- Production observability with Prometheus metrics and structured logging
Architecture & Features
- ~48K req/s single instance, ~96K req/s multi-instance proven capacity
- ~1.29ms average WebSocket RTT, ~1.98ms handshake latency
- 5K concurrent connection load profile with stable performance
- Distributed locks for race condition prevention
Key Learnings
- Real-time systems require careful state synchronization and conflict resolution
- Load testing early reveals scalability bottlenecks before production
- Observability is not optional for distributed systems