Over the past few months, I’ve been on a deep and rewarding learning journey — starting from core Java and Spring 6 fundamentals to building secure, full-stack applications using Spring Boot 3, Spring Data JPA, and Spring Security.

This entire path was guided by the excellent Telusko Spring 6 + Spring Boot Playlist, which helped me understand how each concept builds upon the previous one — from setting up a simple Spring project to developing production-ready applications.

🚀 What I Learned

I focused on building hands-on experience and applying concepts in real projects. Key highlights include:

🖥️ Spring Core & Spring Boot

  • Understanding IoC (Inversion of Control) and Dependency Injection
  • Building modular, maintainable backend layers
  • Configuring Spring Boot 3 for REST APIs, layered architecture, and environment-specific profiles

🗄️ Spring Data JPA

  • Entity mapping and database relationships
  • CRUD operations and repository patterns
  • Integration with full-stack applications

🔐 Spring Security

  • Authentication & authorization (JWT, Bcrypt)
  • OAuth2 login with Google and GitHub
  • Securing REST APIs in real-world projects

🏗️ Full-Stack Projects

  • Bookstore API: implemented RESTful CRUD operations with JPA and layered architecture
  • Spring E-Commerce Project: connected React frontend with Spring Boot backend
  • Learned to handle CORS, API routes, and asynchronous data fetching

💡 Takeaways

This journey helped me not just learn frameworks, but think like a backend engineer — building secure, maintainable, and scalable applications.
It also strengthened my problem-solving, debugging, and full-stack integration skills, which are critical for transitioning into a Software Development Engineer (SDE) role.

🎯 Next Steps

I plan to:

  • Explore microservices architecture with Spring Boot
  • Implement CI/CD pipelines for full-stack apps
  • Deploy cloud-native applications using AWS and Docker
  • Continue strengthening Spring Security knowledge and real-world backend skills

Thanks for reading! 🌱
If you’re learning Spring 6 or Spring Boot, following along with projects like this is a great way to understand backend fundamentals, security, and full-stack integration.