Premium Full-Stack Auth & Task CRUD Application

A secure, performance-oriented full-stack web application featuring JWT-based authentication, role-based access control (RBAC), and a dynamic task management dashboard.

🚀 Technical Stack

• Frontend: React.js (Vite), Axios, Lucide Icons, Vanilla CSS (Glassmorphism design)
• Backend: Node.js, Express, MongoDB (Mongoose), JWT, Joi Validation

🖼️ Visual Preview

Dashboard Overview

Authentication Flow

Interactive Demo

🛠️ Getting Started

Prerequisites

• Node.js (v20+)
• MongoDB (running locally on port 27017)

Local Setup

1. Clone the repository

2. Backend Setup:

   cd backend
   npm install
   npx nodemon app.js

   The server will run on http://localhost:5001

3. Frontend Setup:

   cd frontend
   npm install
   npm run dev

   The app will run on http://localhost:5173

⚙️ Production Deployment (systemd)

For production environments, it is recommended to manage the Node.js backend using systemd.

What systemd does:

• Automatic Restarts: If the backend crashes or the server reboots, systemd will automatically restart the service.
• Background Processes: Runs the application as a background daemon without needing an active terminal session.
• Log Management: Integrates with journalctl for centralized logging and rotating logs.
• Resource Control: Allows you to set limits on CPU and memory usage for the application.

Example systemd service file (/etc/systemd/system/node-app.service):

[Unit]
Description=Node.js Full-Stack Backend
After=network.target

[Service]
Type=simple
User=your-user
WorkingDirectory=/path/to/backend
ExecStart=/usr/bin/node app.js
Restart=on-failure

[Install]
WantedBy=multi-user.target

🔑 Authentication Flow

1. Register: Create an account with a username and password. Usernames allow alphanumeric characters and underscores.
2. Login: Authenticate to receive a JWT token, which is stored in LocalStorage.
3. Authorized Requests: A frontend Axios interceptor automatically attaches the JWT to the Authorization header for all task-related CRUD operations.

📡 API Endpoints

Auth

• POST /api/v1/auth/register - Create new user
• POST /api/v1/auth/login - Authenticate and get token

Tasks

• GET /api/v1/tasks - Get tasks (Admins see all, Users see their own)
• POST /api/v1/tasks - Create a new task
• PUT /api/v1/tasks/:id - Update an existing task
• DELETE /api/v1/tasks/:id - Remove a task

Documentation

• GET /api-docs - View interactive Swagger documentation

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📈 Scalability & Architecture Notes

This application is designed to scale from a monolithic MVP to a production-grade enterprise system.

1. Caching with Redis

• Session Caching: While using stateless JWTs is scalable, a Redis-backed "Deny List" or "Session Manager" can provide immediate logout capability and session invalidation.
• Data Caching: Implement Redis caching for the GET /tasks endpoint to reduce MongoDB read pressure for frequently accessed data.

2. Database Scaling

• Replica Sets: Deploy MongoDB with a Primary-Secondary-Arbiter setup to ensure high availability and read-scaling.
• Sharding: As the user base grows, partition data across multiple shards based on userId to distribute write load.

3. Microservices Migration

• Auth Service: Decouple User Registration and JWT logic into a dedicated service.
• Task Service: Isolate entity management into a microservice that communicates via gRPC or message queues (RabbitMQ/Kafka) for asynchronous processing (e.g., sending task reminders).

4. Load Balancing & Performance

• Reverse Proxy: Use Nginx or HAProxy to distribute traffic across multiple Node.js instances.
• Node.js Cluster Mode: Utilize the cluster module or PM2 to leverage multi-core CPUs on a single server.
• CDN: Serve the frontend static assets via Cloudflare or AWS CloudFront to reduce latency.

5. Security Enhancements

• Rate Limiting: Implement express-rate-limit to prevent brute-force attacks on /login and /register.
• Input Sanitization: Use a deeper layer of sanitization (e.g., helmetjs) and CSRF protection for browser-based session security.