Referred by a friend and get a call by HR pretty soon. Write a code sample first and scheduled a phone interview. There is an onsite interview with 4 rounds algorithm question after pass the phone interview.

Initial contact included a coding challenge and personality assessment. That was followed by a phone interview where coding questions were completed in a shared Google docs document. A couple weeks later, a recruiter contacted me to invite me to an on-site interview. Transportation and lodging were paid for this. The On-site interview consisted of four 45-minute 1-on-1 sessions with four different engineers and an informal lunch session which was not included in consideration. 1-on-1 sessions consisted of one or more coding questions which I designed solutions and wrote actual code for on a large white-board surface (an entire wall of the interview room was white-board). A couple week's later the same recruiter contacted me regarding the decision to not extend an offer.

Applied through Google's career page. About a week later I was given an online coding exercise which consisted of two 45 minute questions. I continued to the phone interview which I did in Javascript and consisted of three front end questions and two coding questions. A few weeks later I was invited to the on-site interviews. It consisted of five 45 minute interviews and a lunch break where I was paired with an engineer who showed me around.