I'm an Android Developer and I have 7 personal apps on the store 3 of which are very successful. I have a total of 1M downloads on Google Play from my personal apps. I've been developing Apps for the past 5+ years for different clients now.
My portfolio of published apps that I built from scratch on Google Play:
https://play.google.com/store/apps/developer?id=Rapid+Developers&hl=en