In my first job another junior dev and I (junior at the time) were assigned the task of designing and implementing a user management and propagation system for a biometric access control system. None of the seniors at the time wanted to be involved because hardware interfacing in the main software was seen as a general shit show because of legacy reasons. We spent weeks designing the system, arguing, walking out in anger, then coming back and going through it again.

After all that, we thought we would end up using each other, but we actually became really good friends for the rest of my time there. The final system was so robust that support never heard back from the client about it until around 2 years later when a power outage took down the server and blew the PSU.

Good times.