Senior Data Engineer

About PolymarketPolymarket 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 RolePolymarket is looking for a Senior Data Engineer to help scale our data platform to support the next phase of the company's growth. Every trade, position, and resolution flows through a data layer that powers our entire user-facing product – leaderboards, PnL, activity feeds, positions, volume analytics – with sub-100ms latency targets at crypto scale.The team is small and high-ownership. We need a senior operator who can drive entire workloads end-to-end, not just execute on a defined roadmap. You'll be hands-on with design, architecture, and delivery. Your mandate: make Polymarket's analytics and serving data layer something the rest of the company can build on without thinking. Schema drift, parity gaps under migration, latency regressions, and cost blowouts all land on this role. When a product team asks "can the data layer answer this query under X ms at Y $/month," you're the one who can say yes confidently, or redesign the slice that makes it possible.What You'll DoOwn the OLAP analytics layer. Drive our columnar warehouse environment end-to-end: raw event ingestion → cleaned facts and dimensions → business aggregates → API-serving views. You'll own materialized view design, refresh cadences, dictionary catalog, query planning, and cost optimization.Partner on the OLTP serving layer. Work closely wit