🔔 NotifyNow

A lightweight real-time notification system built to learn Redis Pub/Sub and Socket.IO. Notifications published on one server are instantly broadcast to all connected clients, even when they're connected to different Node.js server instances.

This project was built as a learning exercise to understand event-driven architecture, WebSockets, and Redis Pub/Sub.

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📸 Screenshot

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🎥 Demo Video

The project demonstration can be found here:

▶️ Watch Demo

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✨ Features

• Real-time notification broadcasting
• Redis Pub/Sub for cross-server communication
• Socket.IO for instant client updates
• Multi-server synchronization
• Simple responsive frontend
• Dockerized Redis for local development

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🧠 Redis Concepts Used

• Pub/Sub (PUBLISH, SUBSCRIBE)
• Message Broker
• Event-driven Communication

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🛠️ Tech Stack

Backend

• Node.js
• Express.js
• Socket.IO
• Redis
• Docker

Frontend

• HTML
• CSS
• JavaScript

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📂 Project Structure

NotifyNow/
│
├── backend/
│   ├── controllers/
│   ├── app.js
│   ├── server.js
│   ├── package.json
│   └── .env
│
├── frontend/
│   ├── index.html
│   ├── app.js
│   └── config.js
│
├── public/
│   └── screenshot.png
│
├── README.md
└── LICENSE

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🚀 Run Locally

Clone the repository

git clone https://github.com/ganeshkarthik016/NotifyNow.git

Move into the backend

cd NotifyNow/backend

Install dependencies

npm install

Run Redis with Docker

docker run -d --name redis-server -p 6379:6379 redis

Start the server

npm run dev

Open the frontend in multiple browser windows (or run multiple backend instances) to see real-time notification broadcasting.

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🎯 Learning Objectives

This project helped me understand:

• Redis Pub/Sub
• Socket.IO
• WebSockets
• Event-driven architecture
• Cross-server communication
• Real-time application development
• Running Redis with Docker

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👨‍💻 Author

Ganesh Karthik

GitHub: https://github.com/ganeshkarthik016

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📄 License

This project is licensed under the MIT License.