Senior Backend Engineer, Onchain

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 a world-class backend engineer with deep blockchain knowledge to join our Onchain Execution team. This team owns the systems that sit between Polymarket's product and the chain — the relayers, transaction pipelines, RPC infrastructure, and settlement logic that make every trade possible. You