As a junior developer, I’ve encountered countless slow queries. Back then, I was so focused on fixing them that I’d just throw indexes at the problem without understanding why they worked. The queries got faster, but I was always left wondering, “Why did that happen?” As a result, I’d inevitably struggle with similar problems all over again. But after completing Kim Young-han’s course, I felt as though I’d found a dependable senior to guide me. I still think slow queries and outages will be scary when I run into them, but I have a feeling I might even feel a little excited, too. Thank you for all the hard work that went into creating such a high-quality course! I’d love to take another great course from you in the future. If you’re a fellow student looking to grow as a backend developer, I highly recommend this course.