Order Execution Engine for DEX Trading | Deployed backend

Description

Order Execution Engine for DEX Trading | Production-Ready Backend Built a high-performance order execution engine that intelligently routes market orders between Raydium and Meteora DEXs to get the best prices for traders. ⚡ Key Features: • Intelligent DEX Routing - Compares prices across multiple DEXs in real-time • Queue Processing - Handles 113,000+ orders/minute with BullMQ • WebSocket Updates - Live order status streaming to clients • Docker Containerization - Multi-stage builds with production optimizations • Production Deployment - Live on Railway with auto-migrations • API Testing - Complete Postman collection with 8 automated tests • Well-Tested - 44 unit tests, 100% passing, 80%+ code coverage 🛠️ Tech Stack: Node.js • TypeScript • Fastify • BullMQ • Redis • PostgreSQL • Prisma ORM • WebSockets • Docker • Docker Compose • Jest • Postman • Railway What I Built: - RESTful API with validation middleware & error handling - Async queue system with retry logic, rate limiting & concurrency control - Real-time WebSocket broadcasting for order updates - Docker Compose for local development (PostgreSQL + Redis) - Multi-stage Dockerfile for optimized production builds - Comprehensive testing: Unit tests + Load tests + Postman collection - Complete documentation, API guides & deployment instructions 📊 Performance: - 10 concurrent workers processing orders - Rate limiting: 100 orders/min per queue - All tests passing 📌 Note: This is a mock implementation simulating DEX interactions for demonstration purposes. 🔗 Links: GitHub: https://github.com/Ayush-0404/Eterna-Backend Live Deployment: https://eterna-backend-production-38e4.up.railway.app #Backend #NodeJS #TypeScript #Solana #DeFi #WebSockets #Docker #Postman #Testing #API #SoftwareEngineering #DevOps