In today’s digital landscape, robust and secure user authentication is paramount for any web application. This guide delves into the creation of a cutting-edge full-stack authentication and registration system, leveraging a powerful combination of modern technologies to ensure both security and efficiency.

We explore the integration of NestJS 11 for building a scalable and maintainable backend API. Authentication is handled through JSON Web Tokens (JWT), providing a secure and stateless method for user verification. Data persistence is managed efficiently using MongoDB, complemented by Mongoose for object data modeling. On the frontend, the dynamic and component-based architecture of Angular 20 is utilized to create a seamless and responsive user experience.

Through this exploration, you will gain a deep understanding of how to:
* Architect and implement a high-performance authentication API with NestJS.
* Design and secure JWT-based login and logout functionalities.
* Fluently integrate your backend services with an Angular frontend application.
* Master essential concepts like route protection and secure token management on the client side.

This holistic approach to full-stack development equips you with the skills to build secure and professional authentication systems from the ground up.