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 the RolePolymarket is looking for an experienced API engineer to develop and deploy endpoints for our ISV customers. You'll build the critical systems that facilitate access to our CFTC-regulated exchange, working directly on REST and FIX API systems.
This is a high-impact role where you'll work directly with engineering teams, build systems that handle liquidity at scale, and help establish the technical foundation for our growing US Exchange business.
What You’ll DoMaintain API access to our US Exchange. Create systems that help ISV participants and institutional customers set market prices on the US Exchange.
Oversee Onboarding of Market Makers. Partner closely with our growing Forward Deployed Engineering team to help market makers access the API.
Manage FIX / REST / SDK Integrations. Architect and test systems for handling various institutional customers and access needs.
Design for scale and compliance. Build systems that handle thousands of daily transactions while maintaining audit trails and meeting CFTC regulatory requirements.
Collaborate with internal teams. Partner closely with operations, compliance, and product to understand workflows, gather feedback, and iterate quickly on tooling.
Lead technical decisions. Participate in architecture discussions, code reviews, and help establish best practices for the team.
3-10 years of professional software development experience
Strong FIX / REST / SDK experience with direct previous projects
Solid experience with AWS, Cloudfare, Kubernetes, Kafka
Experience building data-heavy applications or tools
Strong collaboration and communication skills—you work well with non-technical stakeholders
Bias for action—all-in work mindset eager to work immediately on solving problems
Builder's mindset—you take pride in creating tools that solve real operational problems
(Plus) Background in fintech, payments, reconciliation systems, or regulated environments
(Plus) Understanding of regulated exchange backend and audit requirements
(Plus) Bachelor's degree in Computer Science or equivalent
Competitive salary & equity
Unlimited PTO
Full Health, Vision, & Dental coverage
401k match
Hardware setup — new MacBook Pro, big display, & accessories
Top Skills
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.
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