Not sure if they're working in web development, it seems that a "career" in finance is more likely for most recent STEM graduates:

"Catherine Rampell found that in 2006, just before the financial crisis, 25% of graduating seniors at Harvard University, 24% at Yale, and a whopping 46% at Princeton were starting their careers in financial services."

in https://www.project-syndicate.org/commentary/the-rent-seekin...