Amazon has become Silicon Valley's CFO factory

Amazon is quickly emerging as the go-to source for Silicon Valley tech startup chief financial officers amidst a shortage of experienced candidates.

The big picture: In many ways, Amazon is the perfect breeding ground for future C-suite execs of pre-IPO tech companies. It provides them with big public company experience and a good deal of autonomy as finance chiefs of large divisions, but not so much autonomy that they don't aspire to run their own shops.