Creating the Service Layer (Step by Step) | Spring Boot 3 Tutorial (Part 5)

🚀 Welcome to Part 5 of our Spring Boot 3 REST API series.

In this video, we implement the Service layer and connect business logic to our repository.

This is where many beginner projects go wrong — they skip proper layering and mix responsibilities.

In this video you will learn:

• Why the Service layer exists
• Separation of concerns explained
• How @Service works
• How dependency injection works in Spring Boot
• Why architecture matters in backend projects
• How to properly structure your REST API

Understanding this layer is essential for writing scalable and maintainable backend applications.

👉 In the next video, we’ll build the REST Controller and expose our API endpoints.

Follow the full series to build a complete production-ready REST API step by step.

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