Stages:

• Application / Resume
• Interviews (2 phone interviews and 1 Hangouts interview)
• Hiring Decision

If they believe you're a good fit, a recruiter will contact you after you submit your application/resume. (For me, they responded about a week after I was referred.) They will then schedule your interviews. There are 2 phone interviews, a Hangouts interview, and sometimes a third phone interview. (I was required to do a third phone interview; I suspect this might be because I did poorly on one of the previous phone interviews.) All interviews are technical and last 45 minutes. For the Hangouts interview, you might be asked a few short non-technical questions. After your interviews, they will contact you within about a week to tell you the hiring decision.

I can't give specifics due to the NDA, but they asked questions about data structures and algorithms, similar to what you might find at any other tech company.