polymarket - Integration Engineer, Partner APIs

Remote - USA *2mo ago

Remote NA Cryptocurrency Fintech Integration Engineer Quant Rust Python TypeScript WebSocket REST

Requirements

• Hands-on experience integrating or debugging trading or exchange APIs (REST, WebSocket) in production. You've debugged real issues under pressure, not just in a sandbox. • Strong proficiency in Python. You can write working integration samples, debug partner code, and read Rust or TypeScript when needed. • Strong technical communicator. You can explain how an order book works to a quant at a trading firm and explain what that same firm needs to an internal engineer. • Track record of owning partner or client technical relationships end to end, from first contact through resolution, without dropping things or waiting to be told what to do next. • Solid understanding of electronic trading fundamentals: order types, market data feeds, execution mechanics, and how latency-sensitive systems behave under load. • (Plus) Experience at a crypto exchange, DeFi protocol, or on-chain trading venue. • (Plus) Background doing client integrations for market makers or HFT firms. • (Plus) Prior work as a solutions engineer or developer relations engineer at a fintech or trading technology company. • (Plus) Familiarity with perpetuals, derivatives, or prediction markets.

Responsibilities

• Own technical onboarding for market makers and institutional partners end to end, from first API call to live trading, across our CLOB, WebSocket feeds, and RFQ gateway. • Serve as the primary technical contact post-onboarding, triaging issues, debugging integrations in production, and coordinating with engineering on fixes. • Write and maintain integration guides, code samples, and SDK documentation that reduce time-to-live for new partners. • Monitor the health of active partner integrations proactively and surface issues before partners report them. • Translate partner feedback, including bugs, missing features, and API pain points, into clear, actionable input for product and engineering. • Build and maintain code samples in Python and TypeScript that partners can actually use, not just reference. • Act as the technical bridge between trading firms and internal engineering, explaining complex system behavior clearly to both sides.