I applied through university. The process took 1 day. I interviewed at QSA Global in Jan 2016
Interview
Individual interview with three young guys. each last about half hour. First guy drew some random questions about statistics from wiki, and pretended he knew everything. Second guy was OK, asked some question about random distribution. The third guy asking about real analysis questions, he knew his stuff pretty well.
Interview questions [1]
Question 1
Probability, statistics, and real analysis questions.