Polymarket
prediction market platform
SeniorBackendEngineer,ExchangeSystems
Neural analysis suggests this role is
optimal for Senior candidates.
“Senior Backend Engineer, Exchange Systems at Polymarket. Skills: CLOB engine, low-latency backend systems, concurrency, observability, exchange systems, blockchain settlement layers. Own the CLOB engine's critical path. Profile matching and orderbook hot paths”
What You'll Achieve.
evolve our CLOB engine to be faster, safer, and more concurrent as the platform scales; leaves the system measurably better each time
Industry & Context.
reason clearly about how on-chain transaction lifecycle, confirmations, reorgs, balances, approvals, and execution outcomes affect off-chain exchange state; Debug concurrency issues; Debug production incidents
What They're Looking For.
Must Have
Production experience building low-latency backend systems at scale, 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, computer science fundamentals: algorithms, data structures, concurrency, and profiling
Nice to Have
Direct experience with matching engines or exchange infrastructure, EVM transaction lifecycle experience: confirmations, reorgs, and how on-chain state affects off-chain systems, Go runtime and GC tuning experience, Experience with Redis, PostgreSQL, gRPC, and Protobuf, Kubernetes and AWS production operations experience
What You'll Do.
Own the CLOB engine's critical path
Profile matching and orderbook hot paths
Map settlement-sensitive state transitions
Drive improvements to latency
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
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
Establish rollback guarantees and narrower critical paths that make production incidents easier to detect
Reason about settlement risk
Understand how on-chain transaction effects ripple into off-chain exchange state
Design systems that handle crossed books
cancel inconsistencies
and settlement edge cases correctly
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
and settlement-state incidents end-to-end
Drive follow-through that leaves the system measurably better each time
Full Job Description
ABOUT POLYMARKET Polymarket 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 ROLE Polymarket is looking for a Senior Backend Engineer to join our DeFi Trading team and own core improvements to our exchange systems. You'll work across low-latency APIs, high-throughput data streams, and settlement-aware order state and with a specific focus on evolving our CLOB engine to be faster, safer, and more concurrent as the platform scales. This role requires someone who can reason clearly about how on-chain transaction lifecycle, confirmations, reorgs, balances, approvals, and execution outcomes affect off-chain exchange state. The problems are deep, the stakes are real, and the work will be immediately visible in production. WHAT YOU'LL DO - 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 producti
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