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Sudoku Multiplayer Server

Scalable microservice backend with Node.js, TypeScript, Socket.io for real-time gameplay, JWT authentication, PostgreSQL database, and server-side anti-cheat validation.

Tech Stack

Node.jsExpressTypeScriptSocket.ioPostgreSQLJWTbcrypt

Overview

Designed and implemented scalable microservice backend architecture supporting real-time multiplayer Sudoku gameplay. Built with Node.js, Express, and TypeScript for maintainability and horizontal scalability. Features comprehensive authentication with JWT tokens, bcrypt password hashing, role-based access control, and optimized PostgreSQL schema for user management and game statistics.

Architecture

Microservice architecture with RESTful API endpoints for user management, Socket.io WebSocket server for real-time multiplayer infrastructure, PostgreSQL database with optimized queries, server-side anti-cheat validation system, and production-ready configurations including rate limiting, CORS policies, and security headers.

Code Examples

Real-time Move Validation

socket.on('move', async (data) => {
  const isValid = await validateMove(data);
  if (!isValid) {
    socket.emit('cheat_detected');
    return;
  }
  io.to(gameRoom).emit('move_update', data);
});