Maria Renz spent more than 20 years at Amazon and is now joining SoFi; Renz was most recently vice president of delivery experience and previously was technical adviser to Jeff Bezos; she also previously served as CEO of the Amazon retail subsidiary Quidsi; at SoFi Renz will lead the credit card, brokerage and bank-account businesses; the Wall Street Journal highlights other recent shifts among the senior ranks at Amazon. The Wall Street Journal