Free Course — No signup required

Learn Real-Time Web Apps
in 5 Days

Build a live chat app. Add push notifications. Scale WebSocket connections to thousands of users.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

WebSockets in 5 Days

Free 5-day course on WebSockets and Socket.io. Build real-time chat, notifications, and scalable WebSocket servers from scratch.

  • Understand the WebSocket protocol and how it differs from HTTP
  • Set up a Socket.io server with Node.js in under 10 minutes
  • Build a working real-time chat application from scratch
  • Implement push notifications for live dashboards
  • Handle connection management, rooms, and namespaces
  • Scale WebSocket servers with Redis adapter and load balancers
Real-time
event-driven
Socket.io
library
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
The WebSocket Protocol
HTTP polling vs WebSockets, the handshake, when to use real-time
WebSocket vs HTTPws libraryping/pong
→
02
Socket.io Basics
Server setup, emitting events, client connections, namespaces
Node.js serveremit/onnamespaces
→
03
Building a Chat App
Rooms, private messages, user presence, message history
roomsprivate msgpresence
→
04
Live Notifications & Dashboards
Push notifications, live data feeds, reconnection handling
push eventsreconnectlive charts
→
05
Scaling WebSockets
Redis adapter, sticky sessions, load balancing, production deploy
Redis adapterload balancerdeploy
→
Get notified

Get the full course in your inbox

Optional. Each lesson delivered daily + updates when we add new content.

Free forever. Unsubscribe anytime. No spam.

You're in. Day 1 is in your inbox.

Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

Want to go deeper in 2 days?

Our in-person AI bootcamp covers advanced development, agentic systems, and production deployment. Five cities. $1,490.

Reserve Your Seat →