Details
Rob Witoff is Head of Platform at Coinbase and was previously co-founder and CEO of Unit 410 and CTO of Polychain Capital. He also served as a partner at Amplify Partners and as a security engineer at Google. He holds a Bachelor's degree in aerospace Engineering from the University of Colorado at Boulder.
Work Experience
Relevance Person
Sam Rosenblum
Sam Rosenblum is Vice President of Operations at Phantom and was previously a partner at Haun Ventures and a partner at Polychain Capital, Director of Business Development at Coinbase, Global Strategy Associate at Visa, and Analyst at Lake Partners Strategy Consultants. He obtained his B.A. from the University of California, Los Angeles, where he was a part of the UCLA Honors College and Sigma Alpha Epsilon Fraternity.
Will Robinson
Will Robinson is vice president of engineering at Coinbase and previously served as chief Technology officer at Chronicle. He graduated from Stanford University.
Manish Gupta
Manish Gupta previously served as Executive Vice President of Engineering at Coinbase and also served as Vice President of Engineering at Lyft. He is a graduate of the University of Mumbai and the University of Illinois at Urbana-Champaign.
Max Branzburg
Max Branzburg is Head of consumer products at Coinbase and a graduate of Princeton University.
Amanda Jacobsen
Amanda Tyler is the Head of Marketing for Optimism and was previously the Director of Community for Polygon and Manager of Developer Relations at Google.
Jack Kearney
Jack Kearney is the co-founder of Turnkey and previously served as CTO of Polychain. He graduated from Oberlin College.
Jim Posen
Jim Posen is the co-founder and CTO of Irreducible, and previously worked at Parity Technologies and Coinbase. Jim Posen received his undergraduate degree from Duke University and his master's degree from Stanford University.
Colin Armstrong
Colin Armstrong is the founder of Paragraph and was previously an engineering manager at Google. He holds a Bachelor's degree in Computer Engineering from the University of Waterloo.
Will Kantaros
Will Kantaros is the co-founder of Decent and a research partner at Archetype. He is a graduate of Brown University and Phillips Academy.
Rachael Horwitz
Rachael Horwitz is the CMO of Haun Ventures, and she was the VP of Communications at Coinbase. Rachael Horowitz currently serves as the first-ever Spark Capital Marketing and Communications Partner. This role will put Horwitz at the head of the firm’s marketing and communications activities, along with community events and initiatives. Horwitz spent nearly five years at Twitter as Communications Director, and then took that experience to Facebook’s Communications department for another 15 months.
