I recoded a REST endpoint that transfers large amounts of data from our db using a streaming response so it doesn't crash the server...

Pretty easy... Mostly just needed someone that knew wtf it was or has a bit of curiosity and asks questions... rather than just keep on doing what everyone else is doing...

Who hasn't seen logs updating in near real time in TeamCity, Jenkins... for the last 5yrs+... No one else ever wondered how it's done?

So yes solving a production issue with old technology and being called a genius... I guess is pretty satisfying?