Senior Backend Engineer, Services

This role sits on Polymarket's Services team, which owns the exchange infrastructure that every trade, order, and market resolution runs through. The engineer will build and scale backend systems that process real money in real time at meaningful volume, working alongside a small group of senior engineers with high autonomy and minimal process overhead. The mandate is to keep the exchange fast, correct, and available as Polymarket continues to scale, with direct ownership of production reliability for the systems built.

• Design and implement low-latency backend services powering the core exchange, primarily in Go
• Profile and tune systems for latency, throughput, and memory bottlenecks before they hit production
• Build and maintain event-driven data pipelines and APIs using streaming platforms like Kafka or Pulsar
• Own production reliability, including diagnosing incidents and shipping fixes to prevent recurrence
• Work with product, infrastructure, and data engineers to integrate exchange services platform-wide
• Contribute to distributed-systems architecture decisions around failure modes and graceful degradation

• 4-7+ years of professional backend development, with strong Go, Python, or Java experience
• Deep understanding of algorithms, data structures, concurrency, and memory management
• Experience building and debugging high-throughput, low-latency systems on Linux end-to-end
• Strong instincts for correctness in systems where failures have financial consequences
• Comfortable working independently in a high-autonomy environment
• Experience with trading systems, HFT, or other latency-critical domains is a plus

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