I have been a back-end developer for twelve years. My first love was Rails and when I set out to do freelancing that was my tool of trade.
After a 2.5 year at a startup, I went back to freelancing and learned about Ember.js in January 2013 and fell in love. After learning the ropes and doing a "real" project I wanted to show others the beauty and thought behind Ember. I thus held workshops, presented at conferences, created a screencast series and launched an Ember-related mailing list to which I send content weekly.
I blog at http://balinterdi.com and you can see Ember-related content almost weekly between fall 2013 and summer 2014.