After few (meaningless) HR phone calls, a tech phone interview was scheduled. 45 min with white board coding, usually on 2-3 problems. These could be as easy as BST recursion, or as bad as skip list implementation/application. Remember your algorithms, keeping talking(it's extremely important over the phone especially the other person doesn't know if you're frowning or just thinking). Once passed phone interview, an onsite was scheduled in around a week or so. Starting with meeting a HR to brief you about the day, you'll meet 4-5 engineers for 1:1 technical grilling. Other people said enough about google onsites, and especially I didn't make, I'd just suggest you be relaxed, trust your skills and keep communication flowing with interviewers.