---
title: "Discussion on \"Building a Scalable Chat App\" | Hashnode"
description: "Discussion on \"Building a Scalable Chat App\". Learn how to build a real-time, horizontally scalable chat application using Node.js, Socket.IO, Express, and Redis Pub/Sub architecture. Perfect for produc"
url: "https://hashnode.com/posts/building-a-scalable-chat-app/68293a8dbd215029f13c9ae2"
---

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# [Building a Scalable Chat App](https://blog.kawaljain.com/building-a-scalable-chat-app?utm_source=hashnode&utm_medium=feed)

Learn how to build a real-time, horizontally scalable chat application using Node.js, Socket.IO, Express, and Redis Pub/Sub architecture. Perfect for produc

May 18, 2025 · 3 min read · blog.kawaljain.com  
Updated May 19, 2025  
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-   [#redis](https://hashnode.com/tag/redis)
-   [#socketio](https://hashnode.com/tag/socketio)
-   [#nodejs](https://hashnode.com/tag/nodejs)
-   [#system-design](https://hashnode.com/tag/system-design)
-   [#scalability](https://hashnode.com/tag/scalability)
-   [#websockets](https://hashnode.com/tag/websockets)
-   [#microservices](https://hashnode.com/tag/microservices)
-   [#chat-application](https://hashnode.com/tag/chat-application)
-   [#messaging](https://hashnode.com/tag/messaging)
-   [#messaging-app](https://hashnode.com/tag/messaging-app)
-   [#kawaljain](https://hashnode.com/tag/kawaljain)
-   [#anvikjs](https://hashnode.com/tag/anvikjs)

## Written by

[Kawal Jain](https://hashnode.com/@kawaljain)

@kawaljain · India

  
[View profile](https://hashnode.com/@kawaljain)

Exploring JavaScript, GenAI, and Everything in Between

🧑‍💻 Full Stack Developer | JavaScript & GenAI Enthusiast 🚀 7+ years building scalable web apps with React, Node.js & PHP 💡 Exploring GenAI, Microservices, and Clean Code Principles 📚 Blogging my dev journey, lessons learned, and side experiments ♟️ Chess lover | Vegetarian foodie | Life-long learner

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