I used to be a physicist. Some day back in 2009 I headed to the App Store to buy a physics formula collection for my new iPod touch. There wasn't any which seems to be usable. I started to write my own.
Today and a lot of learning later I am a full time iOS developer.
After work I learn more and develop or improve my own projects. Sometimes I write blog posts about iOS development. Recently I wrote a book about Location Based Projects in iOS.
More about my experience can be found on my Stackoverflow Careers page.
If you want to get in touch with me, I am @dasdom on Twitter.
Code I write is on [github].