Build & Deploy a Production-Ready Fullstack Realtime Chat App | React, Better Auth & Socket.io

In this fullstack tutorial, you’ll learn how to build and deploy a production-ready realtime chat application using React, Socket.io, BetterAuth, Express, PostgreSQL, Prisma, and TypeScript from scratch. We’ll implement authentication, realtime messaging, online user tracking, conversation rooms, and proper socket lifecycle management — just like in real-world production apps. Finally, we’ll deploy the entire application to Render so it’s live and accessible on the internet. This is a perfect portfolio project for developers who want to master realtime systems and build scalable fullstack applications. 🚀 What You’ll Learn ✅ How to build a realtime chat app with React ✅ How Socket.io works (rooms, events, reconnection handling) ✅ Managing global state with Zustand ✅ Handling authentication and protected routes ✅ Tracking online users in realtime ✅ Fixing common realtime bugs (duplicate sockets, missed joins) ✅ Deploying a fullstack application to production 🔗 Links 💼 Connect with EgbonTech on LinkedIn: [  / emmanuel-egbon-8a3991239  ] 💻 Source Code: [https://github.com/egbontech/chatapp-...] 🌍 Live Preview: [https://chatapp-7543.onrender.com] 📁 Assets: [https://drive.google.com/file/d/1My2o...] Chapters 00:00 – Intro & Project Overview 07:43 – Project Setup & Folder Structure 23:22 – Building the Authentication UI 36:46 – Building the Chat Page UI 01:30:15 – Creating the Edit Profile Modal 01:52:29 – Setting Up the Express Server 02:08:35 – Setting Up Prisma with PostgreSQL 02:21:32 – Configuring BetterAuth 02:35:50 – Implementing Authentication Logic 03:05:10 – Edit Profile Functionality 03:50:52 – Fetching Users & Search Functionality 04:10:54 – Implementing Online/Offline Presence 04:37:45 – Starting Conversations 05:00:42 – Creating Messages 05:16:02 – Fetching Messages 05:46:51 – Implementing Realtime Messaging with Socket.io 06:09:17 – Lint Checks & Production Cleanup 06:12:18 – Deploying the Fullstack App on Render 06:35:35 – Final Thoughts & Outro If this video helps you, make sure to like, subscribe, and turn on notifications for more production-level fullstack builds 🚀