Order Execution Engine | Node.js, BullMQ, Docker & Real-Time WebSockets

This is a demonstration of my Order Execution Engine, a high-concurrency backend system designed to handle Market Orders with smart DEX routing on Solana.

The system is built to process orders asynchronously using a message queue, automatically route trades to the best price (Raydium vs. Meteora), and stream real-time status updates via WebSockets. The entire infrastructure is containerized using Docker for seamless setup and scalability.

🚀 Key Features Demonstrated:

Smart DEX Routing: Automatically compares quotes and routes orders to the exchange with the lowest price.

High Concurrency: Uses BullMQ (Redis) to handle multiple simultaneous orders without blocking the main thread.

Real-Time Architecture: Event-driven design streaming updates (Pending → Routing → Confirmed) via WebSockets.

Dockerized Infrastructure: Fully containerized environment (Postgres & Redis) ensuring consistent deployment.

Reliability: Implements exponential back-off strategies for failed trades.

Robust Testing: 100% pass rate on 11 Unit & Integration tests using Jest.

🛠️ Tech Stack:

Runtime: Node.js (TypeScript)

Server: Fastify (for low latency)

Queue: BullMQ + Redis

Database: PostgreSQL

Testing: Jest

Infrastructure: Docker

Видео Order Execution Engine | Node.js, BullMQ, Docker & Real-Time WebSockets канала sam sharma