Ex-Googler here, formerly a SWE in Mountain View. My hours were highly irregular - the shortest day I worked involved getting in at 4:30, out at 7:30 (to be fair, I was stuck at the DMV) and the longest involved getting in around 10:00 AM and out at 2:00 AM the next morning. Average was probably about 10:45 - 7:30, sometimes time-shifted to be more like 1:30 - 10:00. 8-9 hour days were fairly typical, and it was only at crunch times that it would go up to 14 hour days and weekends.
My role was also one that was pretty amenable to sprints of intensive working followed by periods of rest. I did a bunch of prototyping and working on high-profile, tight-deadline projects, and there was naturally a bunch of downtime in between them.
My role was also one that was pretty amenable to sprints of intensive working followed by periods of rest. I did a bunch of prototyping and working on high-profile, tight-deadline projects, and there was naturally a bunch of downtime in between them.