I applied through the website. After a few weeks, a recruiter for that group contacted me via email and scheduled a phone conversation with her.

After that, she scheduled a phone interview with the hiring manager, which was about a one-hour technical discussion.

I had another phone interview with another person for about one hour.

Then, they invited me onsite for a full day of interviews with five or more engineers, one hour each.

Topics ranged from Cocoa development to software architecture, but most of the interviews were knowledge-specific in detail.

So, my advice is to know your stuff.

I have signed an NDA.