A few days after I applied online, I had a phone interview with HR, followed by a technical interview with two hiring managers, and the following week an onsite interview which started at 10 am and lasted until 3 pm. The onsite interview started with a skills test, one-on-one interviews, lunch, and group interviews (some interviewers on the phone). On-site interviewers asked about past internships and papers, also asked behavioral questions. They took notes which they later shared with HR, which offered me the position the next morning.

I spoke with the hiring manager on the phone and then with another manager. The phone interviews were very technical. Then they brought me on site where I had a panel interview with 3 persons. The panel interview was stressful -- they asked many questions (behavioral, IQ-test type, balancing workload etc.) and seemed to be taking notes. I liked the people who interviewed me -- they were experienced and professional. The interview seemed rather short though. They were not very clear on advancement opportunities but with the job market being as bad as it has been, they probably don't need to.