Sean Cashin is Co-Founder and CTO at Highstock, an AI-powered B2B marketplace that connects consumer brands holding excess inventory with a vetted global network of wholesale buyers.

Sean studied Informatics at the University of California, Irvine and built deep engineering expertise as a Senior Software Engineer at Maker before joining Instacart as a Principal Engineer.

Sean brings rare technical depth from scaling one of the most complex fulfillment platforms in consumer tech, giving him a first-hand understanding of the inventory challenges brands face.

At Instacart, Sean worked alongside co-founder Camille van Horne, where both witnessed the systemic problem of unsold inventory being wasted across brands and retailers, inspiring Highstock.

Highstock has raised $35.5M across a $5.5M seed round led by Greylock and a $30M Series A led by a16z, expanding from beauty and personal care into apparel and targeting global markets including India, the Middle East, Canada, and Mexico.