The hiring process consisted of a single phone interview. It was a conference call with four researchers, each one asking me to explain some of the previous research projects I had worked on in the past (which were listed on the CV I sent them). For each one, they asked very detailed questions about the approaches including to explain how certain algorithms worked (they obviously knew, they were testing my knowledge), as well as my reasons for choosing the paths I did. Surprisingly enough, there was no coding-type questions, they clearly stuck to the "science" aspect of computer science. But they were very courteous and knowledgeable. I ended up being made an offer a few days later and took it!