I applied online and got a first interview screening. They may ask you a few technical questions here, but overall it was easy. The second interview is a technical one where they will ask questions related to the position, so make sure you study.
I would say review the questions on Glassdoor.
What are Newton's three laws?
What are the three modes of heat transfer?
What is the ideal gas law?
Stress vs. Strain?
How does a rocket work?
A lot of beam questions and the natural frequency of beams when you move the load around.
The following metrics were computed from 25 interview experiences for the SpaceX Mechanical Engineer role in Hawthorne, California.
SpaceX's interview process for their Mechanical Engineer roles in Hawthorne, California is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for SpaceX's Mechanical Engineer interview process in Hawthorne, California.