[ad_1] A new ByteDance office inside Bellevue’s Key Center was furnished but not yet occupied when GeekWire visited the building on Tuesday morning. (GeekWire Photo / Todd Bishop) ByteDance, the Beijing-based parent company of social video app TikTok, is expanding in the U.S. with a 44,000-square-foot office in Bellevue, Wash. The space, subleased from enterprise