Build REST APIs with Spring Boot 4, Spring Security 7, & JWT

In this course, you will learn how to build and secure modern REST APIs with Java 25, Spring Boot 4, Spring Security 7, JWT, Spring Data JPA with Hibernate 7, and MySQL.

This is a brand-new course built using the latest versions of Java 25, Spring Boot 4, and Spring Security 7.

The entire course is designed for beginners and intermediate developers who want practical, real-world experience. Every concept is explained clearly, and every feature is demonstrated through hands-on projects.

We begin by understanding the foundations of REST. You will learn what REST APIs are, how they work, how clients communicate with servers, and what makes a good API design. We cover important topics such as resources, endpoints, HTTP methods, status codes, and best practices used in real applications. This gives you a strong base before writing any code.

After building this foundation, we move into real Spring Boot development. You will create a Spring Boot 4 project, explore the folder structure, and understand how Spring Boot manages configuration and dependencies. From there, we start building REST APIs step by step by creating controllers, services, repositories, and models. This helps you understand how real backend applications are structured.

Next, we connect our APIs to a MySQL database and build complete CRUD operations. Through a Task Management project, you will learn how to store, update, retrieve, and delete data using Spring Data JPA. You will also learn how to write clean code, validate input, and handle exceptions so your API always returns clear and consistent responses.

Once you are comfortable with CRUD, we move to more advanced backend design. You will build REST APIs for a One-To-Many relationship using a User–Blog mini-project. This helps you understand entity mapping, cascading, lazy loading, and designing APIs that work with relational data.

To make your learning more practical, the course includes a complete Banking Application. In this section, you will build features such as creating accounts, depositing and withdrawing money, transferring funds, and generating transaction history. You will learn how to design business logic, validate data, and build reusable service methods.

After mastering API development, we move into Spring Security 7. This is one of the most important skills for backend developers. You will learn how authentication and authorization work, how Spring Security processes requests, and how to secure API endpoints. We configure database-backed user authentication, encrypted passwords, and role-based access control.

Then we build Login and Register REST APIs using the modern Spring Security configuration approach. This gives you real experience in creating user accounts, validating credentials, and protecting routes based on roles.

The course ends with a complete JWT (JSON Web Token) implementation. You will learn how JWT works, why modern applications use it, and how to integrate it with Spring Security 7. You will create access and refresh tokens, validate requests, secure API routes, and return meaningful error responses.

By the end of this course, you will know how to:

• Build REST APIs using Spring Boot 4
• Structure real backend applications
• Work with MySQL and Spring Data JPA
• Build CRUD and relationship-based APIs
• Develop a complete Banking System
• Implement Spring Security 7 authentication
• Build Login and Register APIs
• Secure applications with JWT tokens

This course gives you practical skills, real-world projects, and modern Spring techniques that you can start using immediately in your job or personal projects.