I applied online. The process took 1 week. I interviewed at X (Berkeley, CA) in Nov 2012
Interview
First interview conducted well. They scheduled me to set up an second interview and informed me that the call will be conducted with Japanese. And I was disqualified on the second interview. That's it.
However, when I was asked if I have any question for this interview process or general working environment of twitter, I gave personal questions to the interviewer why she applied.
Just that, nothing interesting..