Jeffin Jose
Full Stack Developer
Crafting seamless user experiences for web and mobile. 8+ years of full-stack development expertise, with experience leading teams to design and implement scalable applications and cloud solutions.
All projects
Crest Auth System
Crest is a secure and scalable authentication service built with NestJS, featuring OAuth 2.0 integration and JWT-based session management.
Core Features
- OAuth 2.0 Integration: Seamless social authentication with Google using Passport.js, with expandable architecture for additional platforms (GitHub, Facebook, Twitter)
- JWT Authentication: Secure token generation and validation using Passport-JWT strategy
- User Management: Robust user profile handling with automatic profile creation on first OAuth sign-in
- Role-Based Authorization: Flexible access control using Guards and Decorators
Tech Stack
Authentication Flow
- OAuth provider authentication
- Automatic user registration/login
- JWT token generation
- Secure token delivery to client
OAuth Flow
Client Authentication
User clicks "Sign in" button in Next.js app (any client)
client
API Redirect
NestJS /auth/google/signin endpoint redirects to Google
api
Google Consent
User sees Google consent screen if not already authorized
google
Callback Processing
Google redirects to /auth/google/callback, checks user in database
apidatabase
JWT Generation
Generate JWT with PassportJS and redirect to client with token
apiclient