I personally think the most relevant courses I took were an OS course (I don't write operating systems, but knowing how they work can be very important) and alg

I personally think the most relevant courses I took were an OS course (I don't write operating systems, but knowing how they work can be very important) and algorithms come up rarely, but still sometimes. I also had a networking course that I definitely benefited from. Generally, I am quite pleased with my education.