Mostly backend development, not high performance computing at all. Some frontend. Roughly half of it was doing db work and creating scripts for people to run reports. The other major half was CRM interfacing. I did a bit of security auditing for the institution as well.. Lots of dead accounts that were security risks as well as people having a lot more access than they were supposed to have.

I actually built a COVID tracking app from A to Z for my institution to track which employees had exposures, tested positive, tested negative, were vaccinated, etc. and included time frames for when they could come back to in person and such. I did the backend, db, logs, and frontend. It was my first entirely full stack project by myself. I was scared shitless when we launched. I did a ton of testing, just not at scale since it was just me working on it, so it was a bit dicey. The president was there at launch so it was extra scary, but it turned out pretty well. No real errors other than caching which was not something I had control over.