Staff Infrastructure Engineer

About the Role

The growth engineering team at Polymarket owns the systems that bring new users in and keep them moving through the product — onboarding, referrals, user acquisition flows. These are high-stakes surfaces where a broken pipeline or a slow API doesn't just generate an incident ticket; it costs us real users at real scale.

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.

What You'll Do

• 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