I wasn't successful, but from what I knew from the interview, I would definitely want to re-apply and they encouraged me to do so. Interviewers were professional, approachable, and friendly. The receptionist was very nice and made pleasant conversation. Definitely seems like a genuine learning culture. Preliminary phone screening asking about my background, my interest, and what I know about the company. In-person serial interview with the 3 members of the department, arranged in ascending hierarchical order. Cognitive ability test - answer 30 questions in 8 minutes, where ~1/3 of the questions are mathematically based.