Three 30-minute interviews that were mostly technical questions to probe what I knew. I think it was clear during the first interview that they had s specific topic area they were searching for candidates in, which I didn't really fit. However, it was still helpful for me to be able to ask the engineers questions to get a gauge of what they did.

30 Minute Video Call with Hiring Manager. Mostly technical questions, open-ended. Requiring you to go through a design process utilizing your knowledge of materials and design constraints. Limited personal questions.