Senior Backend Engineer, Exchange Systems

🕒 May 20

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Polymarket

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2020

₿ Crypto

🎲 Gambling

💸 Finance

Crypto • Gambling • Finance

Polymarket is a prediction market platform that enables users to wager on the outcomes of various events, including political elections, sports contests, and cryptocurrency price movements. Operating as a decentralized betting service, it allows participants to buy and trade shares in event outcomes, providing a unique way to engage with and speculate on future scenarios. Polymarket combines elements from both traditional markets and blockchain technology, creating an innovative environment for users to make predictions and potentially profit from their insights.

📋 Description

• Own the CLOB engine's critical path. Profile matching and orderbook hot paths, map settlement-sensitive state transitions, and drive improvements to latency, throughput, and async engine flow backed by benchmarks and production-grade evidence. • Reduce lock contention without breaking correctness. Debug concurrency issues, design safer queueing and backpressure for orderbooks, and improve the system's ability to handle materially more markets and order flow with lower tail latency. • Build for observability and safety. Instrument improvements with pprof, metrics, logs, and traces. Establish rollback guarantees and narrower critical paths that make production incidents easier to detect, diagnose, and resolve. • Reason about settlement risk. Understand how on-chain transaction effects ripple into off-chain exchange state, and design systems that handle crossed books, ghost fills, stale orders, cancel inconsistencies, and settlement edge cases correctly. • Improve the runtime. Reduce GC pressure, optimize CPU and memory allocation behavior, and push Go runtime performance to meet the demands of a high-throughput exchange at scale. • Debug production incidents. Own latency, correctness, and settlement-state incidents end-to-end, and drive follow-through that leaves the system measurably better each time.

🎯 Requirements

• Production experience building low-latency backend systems at scale • Strong concurrency skills and a track record debugging lock contention, race conditions, and async correctness issues • Fluency in production Go and Rust • Deep observability experience: pprof, metrics, logs, and distributed traces • Experience with exchange systems that interact with EVM or blockchain settlement layers • Strong computer science fundamentals: algorithms, data structures, concurrency, and profiling • (Plus) Direct experience with matching engines or exchange infrastructure • (Plus) EVM transaction lifecycle experience: confirmations, reorgs, and how on-chain state affects off-chain systems • (Plus) Go runtime and GC tuning experience • (Plus) Experience with Redis, PostgreSQL, gRPC, and Protobuf • (Plus) Kubernetes and AWS production operations experience

🏖️ Benefits

• Competitive salary & equity • Unlimited PTO • Full Health, Vision, & Dental coverage • 401k match • Hardware setup: new MacBook Pro, big display, & accessories