The recruiter was very pushy. Called 3x in a day as if he had some sort of interview quota to meet. He then proceeded to ask me if I had any friends looking for work because they needed 8 more applicants. I asked him if the job would require hardcore mathematics and he lied and said "no". Went through 2 different interviews where I was asked some very difficult mathematic questions. Have yet to hear back.

Only interviewed once for the position. Fairly simple interview questions, based on logic. You might get called for a second interview depending on whether you will be placed for a specific team or not.