I applied through a recruiter. The process took 1 week. I interviewed at Edmodo (San Mateo, CA) in Nov 2013
Interview
Got introduced to a recruiter by a friend. Extremely fast interview process took less than a week (possibly because I had a time sensitive offer) with medium-level algorithm questions and also some pure math/stats if you are interested in data science. Recruiter was very professional (got back quickly each time) and the engineers I talked to seemed pretty cool as well.
Interview questions [1]
Question 1
you have a n by m matrix. if any row has a 0 turn all entries in that row to 0; same with columns. do this in O(1) constant space.
also an interesting data-gathering-with-api question over the phone and some very basic statistics (bayes theorem, etc) for data science