Gave me a homework. After reviewing the homework they called me for an interview. 1h30min interview. 1 hour of technical whiteboard with 2 interviewers and 30 minutes with HR. Technical questions were about Math, software and hardware since they have multiple departments working in different fields. They want to see where you would fit the best. The part with the HR is easy, just personal questions as they do in normal interviews and in which departments you would rather work in.