Search for easy wins, shun refactoring, and always try to build the next thing better, rather than going backwards to retroactively "fix" working (but perhaps less than ideal) things.

I can't really advise on finding companies. I haven't had to search for one myself in a while. Like I said, I'm a freelancer, so I just go with the flow until I can find a new opportunity.

Good luck, believe in yourself more and don't worry so much about categorizing yourself!