Staff Infrastructure Engineer

📋 Job Overview

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 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.

🎯 The Role

This is a senior IC role with a lot of autonomy and very little hand-holding. You'll design, build, and maintain the infrastructure layer that gives the growth team a stable, scalable surface to work on — so they can move quickly without stepping on landmines. You'll define what needs to be hardened, when to push back on shipping velocity in favor of correctness, and how to instrument systems before problems reach production.

✅ Key Responsibilities

• Design and maintain the infrastructure layer that growth engineers build on top of, including onboarding flows, referral systems, and user acquisition pipelines
• Debug reliability incidents affecting growth surfaces, own the investigation end-to-end, and make sure the same failure mode doesn't repeat
• Review growth team pull requests for infrastructure soundness, scalability concerns, and anything that could cause problems at higher traffic volumes
• Instrument data pipelines to surface bottlenecks and failure points before they hit production
• Coordinate with growth engineering to make clear calls about when to harden existing systems versus when to ship new ones
• Set the standards and patterns that the growth team builds against, so individual engineers aren't making the same infrastructure decisions from scratch on every project
• Identify the ambiguous systems that sit between teams, define their boundaries, and drive improvements without waiting for someone to assign them to you

📌 Required Qualifications

• 7+ years of infrastructure or platform engineering experience, with meaningful time spent owning systems in production
• Track record of shipping systems under real user-growth pressure, not just maintaining inherited infrastructure
• Comfortable owning systems end-to-end without close oversight, including making judgment calls when there's no obvious right answer
• Experience reducing incidents proactively, finding bottlenecks in data pipelines or user-facing flows before they become outages
• Strong instincts for the tradeoff between shipping velocity and correctness in a fast-moving team environment

⭐ Desirable Experience

• Prior experience building growth-specific infrastructure such as referral systems, onboarding flows, or user acquisition tooling
• Experience working in small, high-autonomy engineering teams where the scope of your role is defined by what needs to get done

🎁 Benefits

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

🛂 Visa & Eligibility

Not specified