Product Design Engineer applicants have rated the interview process at SpaceX with 2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 53.4% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Phone screen from recruiter for initial fit/match of skills, then talk to the team for more technical conversation. Good chance for company to learn about candidate, but less information for candidate on scope of projects/skills needed (since can't share technical details or needs)