There are four rounds of interviews, in the first round you have to do 2 tests , one is a math test and the other an english test. Then you have a group interview . In the second round of interviews is with Human Resources and its pretty easy, they only ask you about your studies and your personal life. A typical HR interview. The third round of interview is the hardest , it is with a Manager and the interview is more technical but nothing to worry about. The last interview is with a Partner, basically if you get to this point it is 90% sure you are going to get an offer.