December 1, 2014 was my last day at Amazon S3. I joined March 28, 2011 and witnessed tremendous growth. I left as a senior software engineer, and I was with Amazon S3 since around four hundred billion objects, and I helped shipped several public features:

I ended working on stuff that I couldn't talk about.

The core reason that I left was that I had a sense of closure. The most recent launch of event notifications was the last feature I wanted from S3 so that I could build more stuff on top of it. Combine this with the launch of lambda, and I'm as happy as a dead pig in the sun.