At age 17, Michael Sayman was Facebook’s youngest employee ever.

Having already launched 5 apps, he wowed Mark Zuckerberg, earned a demo spot on stage at Facebook F8 conference, and scored a full-time engineering gig as the social network’s go-to teen.

Over the past three years, he helped Facebook try to crack the middle school market with apps like the now defunct Lifestage.

But in August he switched sides, leaving to go work for Google.

Yet his arrangement hasn’t stopped the now-21-year-old Sayman from tinkering with apps during his off-hours.

It follows the social mechanics of his first hit, 4Snaps, which was like Pictionary but where you take four photos instead of drawing to get people to guess the right word.

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