Hello, Younghan. I am a new developer who has only been here for a year. I work at a small startup, so I do a lot of different things. In our company, there are three people, including the development team leader, me, and a fellow developer. Since it is a startup with a small workforce, the three of us work on Android, iOS, Web (Vue), Spring Boot, etc. without distinction. But one day, I could do this and that (app, web, API, etc.), but I wanted to go deep into each field, and since my senior (our team leader) was the only one, I had doubts about whether the code style we learned from following our team leader's code was right. So, I started to study development separately and there were many areas I wanted to improve, so I listened to Younghan's lectures one by one. It was so helpful to me that I bought Younghan's book separately to remind myself, and I'm studying hard. At first, I had a lot of resistance because there were so many Spring annotations and they were confusing, but after listening to Younghan's lecture, I feel like Spring has really come to my development, just like its meaning. Thank you so much!