I applied online. The process took 1+ week. I interviewed at ypf (Buenos Aires) in Feb 2015
Interview
I went for two interview rounds. First was a group interview where they asked us to do different activities while the watched us how we interacted. Second one was a set of logic problems. They told me I had passed all the stages and that they might call me anytime. They never called.
The interview process began with an interview with a HR personel first she ask me about myself, my technical skills. the second interview was at YPF headquarters and they ask me about my technical experience and college education, when I qualify I had to take some psycological tests and medical tests also.