They give you a coding challenge question to complete before a certain deadline. If you complete it to their standards, they contact you about setting up a time to talk on the phone and go over your resume and do a bit of a phone screen.

I heard back a few weeks later from another person at HR to set up an on-site interview time. The on-site interview comprised of a technical interview, followed by a lunch interview, and another technical interview right after.

The technical interviews were 1.5 hours each, while the lunch interview was an hour long.

Interview questions were more math-based and problem solving based than data structures based.