Senior Backend Engineer, Perpetuals

About the Role

Polymarket is launching perpetual futures and we're looking for Senior Backend Engineers to own the core systems that make it run. This is backend exchange engineering in the truest sense: low-latency order matching, high-throughput order state management, and the infrastructure that keeps an exchange operating correctly under load.

Ownership here is real and broad. We're looking for engineers who have built and operated order-book-based exchange systems before and can step in with deep context, take meaningful ownership of critical backend components, and raise the reliability and performance of the platform as we scale. If you've worked on the backend of a serious exchange and want to do it again somewhere with momentum, this is the role.

What You'll Do

• Own core exchange backend systems. Take deep ownership of the systems that power order matching, position management, and order state across perpetual futures.

• Build and optimize the matching engine. Profile hot paths, reduce lock contention, and drive improvements to latency and throughput backed by benchmarks and production-grade evidence.

• Design for correctness at scale. Build queueing and backpressure mechanisms that keep the orderbook consistent and reliable under high load, without crossing books, creating ghost fills, or introducing stale order state.