Senior API Engineer - Polymarket US

ABOUT POLYMARKET Polymarket is the world’s largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centralized “house,” Polymarket aggregates diverse opinions into transparent, market-based probabilities that reflect collective expectations about the future. We're growing fast – both in terms of volume ($21B traded in 2025) and adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media and we need your help adding fuel to the fire. ABOUT THE ROLE Polymarket is looking for an experienced API engineer to develop and deploy endpoints for our ISV customers. You'll build the critical systems that facilitate access to our CFTC-regulated exchange, working directly on REST and FIX API systems. This is a high-impact role where you'll work directly with engineering tea