I applied through an employee referral. The process took 2 weeks. I interviewed at Zendesk (San Francisco, CA) in Dec 2011
Interview
I felt that the hiring and interview process was surprisingly organized and efficient. They're very thorough, so I interviewed with a lot of people, but I think they do that because they're very conscious of making sure that every new hire is a good culture fit.
Interview questions [1]
Question 1
They definitely put you on the spot to come up with really creative ideas during the interview process.