Jeff Rosen

Jeff is an experienced entrepreneur, COO, and software engineer. He was co-founder and COO of Rhombus, a blockchain technology company that securely delivers real-world data to decentralized applications.

Before that, he was a Senior Software Engineer at a variety of San Francisco Bay Area startups, where he built secondary liquidity programs for private companies, invoice management software for restaurants, and injury prevention technology for professional athletes and Navy SEALs.

Jeff has a passion for education and math. After college, he taught in a high school in inner-city Oakland, where he founded “Panthers Go to College” and raised a fund to take his students on college visits across the country.

Jeff received his B.A. with Distinction in Mathematics and Philosophy from Yale University, where he was awarded the Benjamin F. Barge Prize in Mathematics and Clarence W. Mendell Prize for his original research.