Backend with Spring Boot 4
A 7-step path through a real backend — from the first line to auth, tests, and deployment.
- Difficulty
- intermediate
- Lessons
- 7
- Total time
- 195 min
Why Spring
Java 21 + Spring Boot 4 powers most production Korean backends — strong types, mature ecosystem, proven patterns.
By the end:
- Understand multi-module Spring projects
- Treat SQL as SSOT, JPA/MyBatis as readers
- Design REST APIs to spec
- Add JWT authentication
- Write integration tests with
@SpringBootTest+ Testcontainers - Deploy with Docker + Caddy
Prerequisite — getting-started + Java 21 installed.