I recently finished building one of my most solid backend projects — a complete authentication system written in Express.js, powered by MongoDB, JWT, and a clean architecture design.
Here’s what I implemented step-by-step:
**🔐 Access + Refresh tokens with secure storage
🗂️ Session tracking in the database
🧹 Automatic session invalidation
🛡️ IP-based rate limiting (5 attempts / 10 mins)
🧪 Validation middleware for all inputs
⚠️ Global ApiError system for consistent error formatting
🧱 Clean architecture with controllers, services, utils
🛠️ Multiple bug fixes + edge case handling
🚀 Focus on maintainability & production readiness**
This project taught me a LOT about system design, real-world auth, and secure backend development.
If you like it, Hit a ⭐ on GitHub or share it with other developers!
👉 GitHub Repo: https://github.com/hamidukarimi/authforge-express
If you have ideas on improvements or want the front-end version too — let me know!
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