I took part with 2 phone interviews. 1st interview was just to introduce myself and the recruiter. A quick tour on my career, interests, aicnd what MongoDB is looking for. It was not challenging at all. 2nd interview was supposed to be a technical interview and it was. Since I come from Java world the most of the questions were Java related. All of them were very easy for me to answer and I did not find this interview challenging whatsoever. The problem here is that they were not interested in continuation, which is quite difficult to understand for me. It seems that this was pure waste of time, maybe they just make their statistics on number of interviewed persons. This just does not make sense to me. Overall experience with this company is very poor because even I asked for some feedback they just ignored me.