A high-performance Node.js backend system designed for real-time cryptocurrency trading. Built with scalability and reliability in mind, supporting thousands of concurrent connections and microsecond-level order processing.

Key Features

  • Real-time Data Processing: WebSocket connections for live market data
  • Order Management System: Advanced order matching and execution
  • Risk Management: Real-time risk assessment and position monitoring
  • Multi-Exchange Support: Connect to multiple cryptocurrency exchanges
  • High Availability: Fault-tolerant architecture with automated failover

Technical Stack

  • Node.js & TypeScript
  • Redis for caching and pub/sub
  • PostgreSQL for persistent data
  • WebSocket for real-time communication
  • Docker & Kubernetes for deployment
  • Prometheus & Grafana for monitoring

Impact

  • 99.99% uptime achieved in production
  • Sub-millisecond order processing latency
  • Handles 10,000+ concurrent WebSocket connections
  • Processed over $1M in trading volume daily

Architecture

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   Client Apps   │    │   Load Balancer │    │   API Gateway   │
└─────────────────┘    └─────────────────┘    └─────────────────┘
         │                       │                       │
         └───────────────────────┼───────────────────────┘
                                 │
    ┌─────────────────────────────────────────────────────────┐
    │                Trading Engine                           │
    │  ┌─────────────┐  ┌─────────────┐  ┌─────────────┐    │
    │  │ Order Book  │  │Risk Manager │  │ Position    │    │
    │  │ Engine      │  │             │  │ Manager     │    │
    │  └─────────────┘  └─────────────┘  └─────────────┘    │
    └─────────────────────────────────────────────────────────┘
                                 │
    ┌─────────────────────────────────────────────────────────┐
    │              Data Layer                                 │
    │  ┌─────────────┐  ┌─────────────┐  ┌─────────────┐    │
    │  │ PostgreSQL  │  │    Redis    │  │  Time Series│    │
    │  │             │  │   Cache     │  │   Database  │    │
    │  └─────────────┘  └─────────────┘  └─────────────┘    │
    └─────────────────────────────────────────────────────────┘

Code Example

import { TradingEngine } from "./engine/TradingEngine";
import { OrderBook } from "./orderbook/OrderBook";
import { WebSocketServer } from "./websocket/WebSocketServer";

const engine = new TradingEngine({
  redis: { host: "localhost", port: 6379 },
  database: { host: "localhost", port: 5432 },
  exchanges: ["binance", "coinbase", "kraken"],
});

const orderBook = new OrderBook("BTC/USD");
const wsServer = new WebSocketServer({ port: 8080 });

// Real-time order processing
wsServer.on("order", async (order) => {
  const result = await engine.processOrder(order);
  wsServer.broadcast("orderUpdate", result);
});

// Start the trading engine
await engine.start();

Performance Metrics

  • Latency: < 1ms order processing
  • Throughput: 100,000+ orders per second
  • Concurrency: 10,000+ WebSocket connections
  • Uptime: 99.99% availability
  • Memory Usage: < 512MB under normal load

Getting Started

  1. Clone the repository:
git clone https://github.com/utkarshjosh/trading-backend.git
cd trading-backend
  1. Install dependencies:
npm install
  1. Configure environment:
cp .env.example .env
# Edit .env with your configuration
  1. Start the development server:
npm run dev

Documentation

For detailed API documentation and deployment guides, visit our GitHub repository.

License

MIT License - See LICENSE for details.