Workers of the world, log inThe social network has already shaken up the way professionals are hired. Its ambitions go far beyond that A LOT of room in an office is a sign either of a blossoming company or a shrivelling one. Happily for Frank Han, the empty space at Kenandy, a cloud-computing company in Redwood City, a few miles south of San Francisco, indicates the former. As manager of “talent a
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