The first round is a recruiter phone screen, which is straightforward.

The second round is a technical screen with a member of the team. In this round, they ask technical questions related to your resume and try to get to know you better.

The third interview is with a manager. They ask fundamental engineering questions about fluids, mechanics of materials, statics, and machine design.

Feedback is very fast, and they basically tell you if you move on at the end of the interview.

However, communication with the recruiter is REALLY BAD. The hiring process is not very transparent and, quite honestly, a turn-off for even applying or interviewing.

Bernoulli's principle, thin-walled pressure vessel, cantilever beam, etc.