Interview Q1 - JAVA(Spring Boot) Filter Chain Explained | Middleware (Authentication Flow)
In this video, I explain how middleware works in Spring Boot using the Spring Security Filter Chain.
Many developers coming from Node.js wonder how middleware works in Spring Boot. In this video, we break down the full request lifecycle and understand how filters intercept requests before they reach the controller.
Topics covered:
• What middleware means in backend systems
• How filters work in Spring Boot
• Spring Security Filter Chain architecture
• Authentication flow (Filter → AuthenticationManager → AuthenticationProvider)
• How SecurityContextHolder stores authenticated users
• Where JWT and authentication logic fits in the filter chain
This video will help you clearly understand how authentication works internally in Spring Security.
Tech Stack:
Spring Boot • Spring Security • Java
Perfect for:
Backend developers, Spring Boot beginners, and anyone preparing for backend interviews.