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This is a guest repost by Zoli Kahan from Clay.io.

This is the first post in my new series 10x
, where I share my experiences and how we do things at Clay.io to develop at scale with a small team. If you find these things interesting, we're hiring - zoli@clay.io.
The Cloud
CloudFlare

CloudFlare handles all of our DNS, and acts as a distributed caching proxy with some additional DDOS protection features. It also handles SSL.
Amazon EC2 + VPC + NAT server