Boss was in India demoing an app I wrote from scratch, minus a printer feature I insisted was necessary. Get a call from my boss: “I don’t need you to tell me you told me so, I need a printer and supporting functionality”

Being a dev in South Africa (at the time) meant that availability wasn’t the best. I drove out to a supplier, got the required hardware (on personal funds) and wrote the library. Had it all done and updated in 24 hours.

My boss refused to pay for the printer or give me any time in lieu. Started looking for jobs the same day.