Facebook Inc. hired Michael Sayman for an internship when he was 17 years old, and gave him a full-time engineering job at 18. Now, the wunderkind is leaving for Alphabet Inc.’s Google. He turned 21 last week.
At Facebook, Sayman was a product manager who helped the social-media giant understand how his generation uses their phones, advising on experimental products for teens and helping executives understand trends. At Google, he’ll be a product manager for Assistant, a voice-based service built on the search engine’s giant database.
