Senior Backend Engineer, Exchange Systems

🕒 July 28

🗽 New York – Remote

🗽 New York – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 30%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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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

• Senior+ backend or systems engineer with production ownership of an exchange system — perp DEX, crypto exchange, or any high-throughput trading backend with on-chain settlement • Hands-on experience with matching engines, order routing, or market data infrastructure where tail latency, correctness, and rollback safety were real constraints • Deep Go expertise — you've tuned GC pressure, optimized hot paths, and understand the runtime internals that matter in a high-throughput exchange context • Strong concurrency skills with a real track record: lock contention, race conditions, async correctness, and backpressure under load • Profiling experience you've actually used in production — pprof, flamegraphs, and metrics to find and fix latency problems, not just describe them • EVM/blockchain transaction lifecycle experience: you understand how confirmations, reorgs, and on-chain state ripple into off-chain exchange correctness • Strong CS fundamentals: algorithms, data structures, and systems-level thinking • (Plus) Rust experience • (Plus) Redis, PostgreSQL, gRPC, Protobuf • (Plus) Kubernetes and AWS production operations

🏖️ Benefits

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