At Amazon I worked on one of the EC2 teams based in Cape Town. If you have ever used the EC2 command line tools or AWS Web Console, those requests hit our API. We were a team of ~10, managing > 1k servers in 10 locations. I wrote mostly Java code and a few internal tools in Ruby.
I learned a lot at Amazon, mostly in the developer tooling and large scale ops / metrics space. I loved my team members and had a great boss, but Mr Schilling @ Uniregistry made me an offer I couldn't refuse.