I am a job seeker who graduated from the Department of Big Data and was contemplating my career path. During that time, I was strongly impressed by the corporate positions that required backend servers, data engineering, statistics and analysis, and ML knowledge. Backend and data engineering were not courses I had taken in my undergraduate studies, so I had to fill them myself. Now that I am a graduate, many people advised me that it was too late to make that decision. But I wanted to do it. So I decided to give it a try. It has been 5 months since I started studying backend through the government-funded course, which I thought was the fastest way. I thought the government-funded course was not enough, so I invested all my time except for studying at the academy and sleeping. As a result, I studied up to Spring, but I couldn't shake the feeling that Spring was a mess in my head. In the meantime, I took the introductory course first because Younghan recommended it to me. Everything I was worried about was included in Younghan's course. He solved the content that I didn't understand properly. If I had a question while taking the course, there is content in the next session that will answer that question. Many people say that it seems like they are receiving private tutoring, and I understand that. I will try to make all the roadmaps with my knowledge. I appreciate and respect you for creating such a great lecture.