Frank Rotman co-founded QED Investors after being recruited straight from the University of Virginia to help build Capital One from within Signet Bank, giving him an unusual background as both a company builder and fintech investor with end-to-end perspective on the sector's evolution. Trained as an applied mathematician and systems engineer, he approaches venture investing through a "carbon vs. silicon" framework that evaluates the interplay between human judgment and algorithms, while building a distinctive online brand as @FintechJunkie through tactical Twitter threads that serve as operating manuals for founders on topics like unit economics and scaling risks.