Following the Spring and JPA roadmap, I successfully changed jobs for the first time in my third year in September of last year. After changing jobs, I looked for Airflow, Go, etc. necessary for adapting to the new workplace, analyzing legacy codes, and improving deployments, and I immediately acquired and used the knowledge I needed at every moment. As a result, I became a wild type as the instructor said, and I strongly feel that I will be more like that in the future. When a situation puts a lot of pressure on me to solve a problem, I tend to focus more on the situation that I need to solve than the knowledge I need, but in the end, it is important to solve it with accurate knowledge, so I think I end up exploring the things I lack in more detail. I have finally completed the JPA roadmap. It is not necessarily querydsl, but I can use jooq or mybatis in a new project in the future, but I feel like I have really established and finished the basis of knowledge that I can apply. It has become a basic belief in my attitude to explore and approach any technology on my own when given. And I think practical experience makes me stronger. Thank you. I will slowly take the Spring roadmap, which has completed up to MVC1, and gain practical experience.