In my first job, back in the late 90s, I was working for a company that, having taken their biggest customer yet, had to split a very large C monolith into chunks that could run on separate servers. The architecture team of the company found all the places where the system should be cut, but that let them with hundreds of functions that had to be replaced with asynchronous calls relying on a queuing system. I was hired into the team that had to stub those hundreds of functions, type up serialization and deserialization for all the hundreds of data structures involved, and gluing it all together. So they had budgeted for 6 months of typing from a team of relatively new developers.
As you might expect, that's not how anyone wants their career to go, but I had taken the compiler class. So I knew I could parse all the header files for the functions we needed to replace, parse the data structures along with it, and just generate all the boilerplate away. My dev lead thought there's no way we could do this, but his manager decided that, at works, giving me two weeks to try it would be a great opportunity to teach the new hire the limit of his knowledge. But as anyone that has taken the compiler course knows, parsing boring C structs and header files isn't magic. So two weeks later, the project was done, and it was working.
As you might imagine, the dev lead, in his 40s, couldn't handle the results all that well, and left quickly. So I went from being stuck writing boilerplate from month to a quick promotion to team lead in under a quarter, all thanks to the compiler course.