At first, I was interested in artificial intelligence, so I majored in AI-related subjects and Python during my undergraduate years. However, I wanted to learn backend so much that I started studying backend 6 months ago. I started with Python Flask, but I wanted to study backend in Java in depth, so I took all of Kim Young-han's YouTube introductory lectures, and am now taking JPA and practical Spring lectures. I was worried because I changed languages and frameworks late, but I am so grateful that you explained it in depth in easy terms so that students who are new to Spring or JPA can understand it. !!! I will definitely complete the roadmap to gain a lot of knowledge about Spring and JPA and become a developer who can use it for development.! Thank you!!!