Google is growing non-stop. I have been with Google for under 2 years and have seniority over 73% of the people. But more importantly, Google offers multiple training sessions and career consultants to help employees figure out the best career path for themselves. I meet with my manager one-to-one on a weekly basis to discuss career growth. Promotions are offered every 6 months, and the average promotion time is 2 years.

Growth here isn't that great, since customer service jobs don't get promoted much. Also, kids who are a few years out of college often become your superiors, regardless of how many years of experience you have.