I applied through other source. The process took 2 months. I interviewed at Quantcast (San Francisco, CA) in Jun 2015
Interview
Linkedin InMail -> Phone interview -> Take home task (fun question) -> Onsite
Interview questions with Quantcast are not easy but lots of fun, interview includes Data Structure/Algorithm and System design questions. The good part is, those questions are sort of open-ended questions, so it is not like those boring ones which you can find on some websites.
I enjoyed a lot of this process, people I spoke/met with are very smart, passionate.
HR is professional, nice, helpful!
Interview went with 7 interviews but got rejection because one person say no, all other says yes therefore I am confused that majority is saying and it is not about the technical part.
Take home assignment and follow up on the take home. Easy take home and easy follow up. Expect to explain your thought process and extend the take home assignment with another engineer.
Interview Screening - Talked to a hiring manager in a video call talked about the company, my experience, salary expectations, the next interview would have been a technical interview, and then a live coding interview.
