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 volume ($21B traded in 2025) and in adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media, powered by fast, reliable, and deeply technical market infrastructure.
About the rolePolymarket is looking for a backend/product engineer to own the core domain APIs and data models that power our consumer-facing product.
You’ll work at the intersection of backend infrastructure and product, shipping the primitives that frontend, mobile, and product teams build on top of — with high ownership and a strong bias toward execution.
What you’ll doDesign core domain APIs: Build and evolve the APIs and data models that underpin Polymarket’s consumer product at scale.
Build real-time infrastructure: Develop gRPC/Connect services and real-time streaming systems (e.g., WebSocket-to-gRPC-stream migrations) alongside event and notification infrastructure.
Ship end-user features: Partner directly with frontend, mobile, and product teams to deliver features like personalization, search, and live data feeds.
Unify fragmented systems: Consolidate fragmented services and APIs into cleaner, reusable primitives that speed up future feature development.
Balance debt and delivery: Pragmatically balance technical-debt cleanup with shipping new product surface area under tight deadlines.
Collaborate cross-functionally: Work closely with engineers across product, infra, and data to ensure tight integration with the broader platform.
Backend/product engineering experience designing and evolving domain APIs and data models for a consumer-facing product at scale.
Hands-on experience with gRPC/Connect and real-time streaming (e.g., WebSocket-to-gRPC-stream migrations) and event/notification infrastructure.
Track record partnering directly with frontend, mobile, and product teams to ship end-user features.
Experience unifying fragmented services and APIs into cleaner, reusable primitives.
Pragmatic judgment for balancing technical-debt cleanup with shipping new product surface area under P0 deadlines.
(Plus) Experience at a high-growth consumer product company or marketplace.
(Plus) Experience deploying systems in cloud environments (AWS/GCP) and using containers.
Competitive salary & equity
Unlimited PTO
Full Health, Vision, & Dental coverage
401k match
Hardware setup — new MacBook Pro, big display, & accessories
Base salary range: $250,000 to $500,000, plus equity and benefits.
This is a good-faith range for the level we're hiring at. Experience varies widely within a title here, so if your expectations fall outside it, reach out anyway. We're always happy to talk it through.
Skills Required
- Design and evolve domain APIs and data models for consumer-facing product at scale.
- Hands-on experience with gRPC/Connect and real-time streaming (including WebSocket-to-gRPC migrations).
- Experience building event and notification infrastructure.
- Proven track record partnering with frontend, mobile, and product teams to ship end-user features.
- Experience unifying fragmented services and APIs into cleaner, reusable primitives.
- Pragmatic judgment balancing technical-debt cleanup with shipping new product surface area under tight deadlines.
- Experience at a high-growth consumer product company or marketplace.
- Experience deploying systems in cloud environments (AWS or GCP) and using containers.
What We Do
Polymarket is an information markets platform, where speculators bet on the world's most highly-debated topics (COVID, Politics, etc) — producing actionable insight on the matters most important to society, and helping you better plan for your future.
