# Senior Backend Engineer, Exchange Systems

**Company:** [Polymarket](https://hotfix.jobs/companies/polymarket)
**Location:** Remote
**Role:** Backend Engineering
**Skills:** Go, Rust, clob, matching engines, Concurrency, low-latency systems, pprof, distributed tracing, evm, blockchain settlement, Redis, Postgres, gRPC, protobuf, Kubernetes
**Posted:** 2026-07-28

> Own and evolve the CLOB engine and exchange systems for a high-throughput prediction market platform. Focus on low-latency APIs, concurrent orderbook improvements, settlement risk, and Go/Rust performance at scale.

## Job Description

## Responsibilities
- 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
- 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
- Debug production incidents: own latency, correctness, and settlement-state incidents end-to-end

## 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

## Nice-to-Haves
- 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

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

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