Any midsize company has tremendous amount of things that could be automated. For example, I work at manufacturing company, we produce parts for bigger companies. Bigger companies already have APIs, web portal, etc. We have people who often manually enter data.

Any time, a piece of paper is passed around or when people enter data manually you can either automate or improve the process. People are prone to errors.

Right now, I am rewriting a mission critical application, some trivial changes will save hours a week and improve the integrity of the information. It is not as exciting as writing algorithms but it is nice to see an application written by you used by 200+ people.