Phone interview from a recruiter. If the recruiter deems you worth interviewing they will set up an in person interview with you.
You will then receive an email stating who your interview will be with. Look these people up on LinkedIn before going and learn about them. There may be last minutes changes to who your interviewer is. But, arrive on time. Park anywhere.
There will be two thirty minute interviews with two people each. These are typically senior members of the team you're interviewing for. Relax. These are just people trying to get to know you.