Learn how to build a fast and safe "Log in with Google" system for your website! In this step-by-step tutorial, we use React, Node.js, Express, and MongoDB to create a complete Google OAuth 2.0 login feature from scratch. You will learn how to get your API keys from the Google Cloud Console, write the backend code, and connect it to your frontend screen.
🔗 Get the Full Source Code: https://www.patreon.com/codewithsadee/posts/google-oauth-2-0-168192757
🔗 Get the Full Source Code 2: buymeacoffee.com/codewithsadee/e/571467
In this video, you will learn:
- How Google OAuth 2.0 works in simple terms.
- How to set up a project in the Google Cloud Console.
- How to build a secure backend server with Node.js and Express.
- How to design a beautiful frontend with React and TailwindCSS.
⏱️ Video Chapters (Timestamps):
0:00 Intro
3:10 Initial project
4:43 Initial backend server
17:44 Setup middlewares
18:37 Setup auth routes
22:32 Setup google auth
43:23 Setup error middleware
45:52 Handle server graceful shutdown
50:39 Update project configurations
53:47 Test auth route
55:32 Setup express session for auth state
1:01:54 Setup auth callback route and request user info
1:14:57 Setup MongoDB
1:25:58 Define user model and store user info
1:37:30 Generate and set tokens in cookies after successful authentication
1:47:10 Setup user routes
1:58:59 Initial Frontend
2:01:25 Implement login page and functionality
2:18:17 Create home page
🛠️ Tech Stack Used:
Frontend: React, TypeScript, TailwindCSS
Backend: Node.js, Express
Database: MongoDB
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Top comments (1)
Hello Glad to see you, I am Kane Lim from Hong Kong. I have over 10 years of development experience. I am writing this because your post was interesting.
This is a solid practical introduction, but I would emphasize that OAuth security is mostly about correctly handling trust boundaries rather than simply obtaining a Google token. On the backend, I would use Authorization Code with PKCE, validate the ID token signature, issuer, audience, nonce, and expiry, then derive identity from the verified Google subject rather than trusting profile fields.
For session security, HttpOnly Secure cookies with SameSite controls, short lived sessions, rotation, CSRF protection, and server side session invalidation are important. I would also enforce strict redirect URI validation and never expose client secrets to React.
MongoDB should store the stable provider subject and account metadata, not raw OAuth credentials. Adding rate limiting, structured authentication telemetry, replay detection, and account linking rules would make this much closer to production grade.
Nice tutorial for beginners. The next step is showing the threat model behind each security decision.