I had 3 rounds, mostly revolved around my work experience and the projects I have worked on. The people are awesome and I loved the conversation style interview. Round 2 was system design, had a nice open ended discussion. Even received a reimbursement for coming for the interview which was rather sweet and shows the employee/person centric nature of the company.

The interview process was very relaxed and interactive. They are more interested in learning about your background and having a conversation instead of just drilling you with random unrelated questions. ESRI has a 2 part interview process : 1 -> Basic phone screen with recruiter with generic questions (tell me about a time - type of questions) and gathering your background information 2 -> 6-8 interviews with the tech teams (I know it seems like a lot but it felt like conversations instead of interviews, so it wasn't tough)