From employee referral, contacted via email then quick 10 minute recruiter phone screening (no technical questions). Flown out for an on-site interview, accommodations arranged by the company. On-site had two stages: 1) A couple hours to make a simple Android app, given a few very loose specs/ideas to choose from. Then present the app and code to panel of Android engineers and answer questions about design decisions and Android in general. 2) Two one-on-one whiteboard coding interviews. Standard whiteboard questions similar in difficulty/depth to what one might see at an on-site Google interview. It was a fun interview. I had a great time even though I didn't get an offer.