Utilize the input text as a context reference, choose the right relationship between Jeff Bezos and Amazon from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

San Francisco-based Fundbox, which launched in 2012 to offer working capital to business with unpaid invoices, just announced that it added Amazon CEO Jeff Bezos and early Twitter-investor Spark Capital to an investor lineup that includes Khosla Ventures and Blumberg Capital.

Answer: employer