There was a 3 stages process. First you need to go in person at human resources so you can fulfill a 5 pages questioner about everything in general, from your education to any potential health issues. Second stage was a medical test, the take an orine sample, check your articulations and hearing by putting you in a confine dark space with a set of headphones, next they start reproducing sounds in random ears until they are very sutil; you need to send a signal on the specific ear by clicking 2 buttons. Third stage is a personal interview with your direct supervisor, he asks you a couple of questions and he tells you if you are hire at the end.