(Writing this as I take a break from working on my startup at the Hacker Dojo...)

Ben/Pinterest are probably the most well-known ex-residents of the Hacker Dojo. It is an awesome place to work, and there lots of promising startups that have set up shop here.

Speaking of hiring engineers, the 2013 Hacker Fair is coming up: http://www.hackerdojo.com/HackerFair3