Secure REST APIs with Spring Security and JWT
Implement authentication, authorization, and JWT security — the skills every Java backend developer is expected to know.
Secure Your Backend — Not Just Build It
Most developers can build APIs. Fewer understand how to secure them properly. This is where many backend candidates struggle in interviews. This course teaches you how authentication and authorization actually work in a Spring Boot application. You will implement login flows, generate and validate JWT tokens, protect endpoints, and enforce role-based access control. No guesswork. No black boxes. You will understand how requests move through filters, how security context works, and how real backend systems protect data.
By the end, you won’t just ‘use Spring Security’. You’ll understand it. You’ll be able to explain how JWT works, how authentication flows operate, and how authorization decisions are made — exactly what backend interviewers expect.
What you'll actually learn
- JWT Authentication from ScratchImplement login, generate JWT tokens, validate them, and understand how stateless authentication works in modern backend systems.
- Spring Security ArchitectureUnderstand filters, filter chains, authentication managers, and security context — not just configuration, but how everything works internally.
- Authorization and Role-Based AccessProtect endpoints using roles and permissions, and enforce access rules the way real applications do.
- Secure REST APIsApply authentication and authorization to real endpoints, ensuring your backend behaves securely under real-world conditions.
- Java Backend Interview PrepLearn how to explain authentication vs authorization, JWT flow, security filters, and access control in interviews.
- Production Security PatternsUnderstand stateless sessions, token validation, password encoding, and how real backend systems handle user security.
Who should take this course
- ✓ Full course access
- ✓ JWT authentication and authorization
- ✓ Role-based access control (RBAC)
- ✓ Spring Security configuration from scratch
- ✓ Java backend interview prep included
- ✓ Real-world security patterns
- ✓ Full Java course library
What students say
"Security always confused me before this. Now I can actually explain JWT, filters, and authentication flow clearly in interviews."
"This filled a major gap. I knew how to build APIs, but not how to secure them. This made everything click."
"Understanding the request flow through filters and security context was huge. This is what interviewers actually ask."
Course Curriculum
Understand authentication vs authorization and how Spring Security integrates into a Spring Boot application.
| Unit | Lesson | What You'll Learn |
|---|---|---|
| 1 | Authentication vs Authorization | Understand the difference between identity and access control and why both are required in secure systems |
| 2 | Spring Security Overview | See how Spring Security fits into a backend application and what problems it solves |
| 3 | Security Filter Chain | Understand how requests flow through filters and where authentication and authorization happen |
Frequently Asked Questions
Build Secure APIs That Work in the Real World
Learn authentication, authorization, and JWT — and explain your security design in backend interviews.