It has been quite some time since I started watching one lecture a day. Before I knew it, I had completed all 110 lectures. I think this instructor’s lectures are truly outstanding. That’s because they include documentation, polished videos, sound, detailed explanations, and hands-on coding exercises that can be reproduced perfectly. While most instructors teach only the bare minimum, this course seems to strive for perfection in every aspect. Compared to other courses, the amount of care put into it is truly remarkable. I’m not sure how well I’ve come to understand Spring Batch after taking this course, since I don’t yet have a complete overall picture of Spring Batch. However, I can confidently say that I gained a fairly deep understanding of everything covered in this course, even though I only went through it once. Thank you so much for creating such a perfect course at this price.

Personally, I have experience configuring user domains based on JWT, OAuth2, and CSRF tokens, but I took this course because I felt I lacked knowledge about the underlying principles of how they actually work. Although the content is quite extensive, I felt the instructor organized and summarized it so well that I could follow along comfortably. In particular, the structural diagrams were drawn very clearly, so for any parts I didn't understand, I was able to supplement my learning by briefly asking an AI. I highly recommend this to anyone who, like me, has implementation experience but feels lacking in their understanding of Security's structure or theoretical knowledge!

It was excellent. After finishing this course, I am now able to visualize the flow of threads within a Java application. Thank you for investing so much time into creating such a high-quality lecture.

Thanks to this, I was able to use it in actual work as well. Thank you.