Comment by nostrademons

Most likely this is a "Senior Research Scientist at Google" rather than a "Senior Google Research Scientist", i.e. "Senior Research Scientist" is his title (the equivalent of Senior Software Engineer on the research ladder) and he works for Google, rather than he is a high-up at the company. He's only 32, has been with the company for 2 years, and his previous job was an assistant professor, all of which are credentials that would be roughly Senior SWE level rather than an executive or department head.