According to his linkedin profile he spent 4 years at Google in Zurich, 1 year at Microsoft and less than a year at Facebook: www.linkedin.com/in/dimakorolev

According to his linkedin profile he spent 4 years at Google in Zurich, 1 year at Microsoft and less than a year at Facebook: www.linkedin.com/in/dimakorolev He doesn't state whether he worked at Facebook's Menlo Park or Seattle office.