One cold email, 4 hours of code: How did a UPenn student break from Wall Street into Polymarket and a16z?

University of Pennsylvania student Dhruv Gupta turned down return offers from Morgan Stanley and Jane Street after finding big-firm bureaucracy stifling, and instead talked his way into product roles at prediction markets Kalshi and Polymarket, the media startup MTS, and a16z's New Media Fellows program within eight months. After a cold email to the only Penn alum at Polymarket went quiet, Gupta built two small projects in four hours, which won him contract work on news.polymarket.com, the Polygraph tooling and thespread.news. He joined MTS on day three of its launch, flew to San Francisco the same day, and helped build evidence-tracking tools for the Musk v. Altman trial during 12-hour, seven-day stretches. He is now building Cosign with Erik Torenberg, a platform meant to surface vetted, high-agency talent for founders and venture firms. The story matters as a case study in how outsiders can bypass credential-and-referral gatekeeping in fintech and media; watch whether Cosign gains traction as a talent-discovery layer for startups.