Three months after raising $195 million, Seattle’s Adaptive Biotechnologies has a new chief financial officer to manage all that cash. The company said Monday it has hired Chad Cohen, the former CFO of real estate information firm Zillow Group, also based in Seattle. Cohen joined Adaptive’s board in March. Adaptive specializes in sequencing the cells in the human adaptive immune system, which are constantly shuffling their genes to combat threats. According to Adaptive, former CFO Dean Schorno is leaving to pursue a job in the San Francisco Bay Area, where he lives.