Polymarket is hiring a Senior Backend Engineer, Trust & Safety in Engineering — New York. The overview below is synthesized from the employer posting on jobs.ashbyhq.com: factual requirements and scope are preserved, but prose is rewritten with editorial context. Verify details and apply via the employer link.
About Polymarket
Company context from the listing:
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.
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 role
Day-to-day scope for the Senior Backend Engineer, Trust & Safety as described in the posting:
Polymarket is looking for a backend engineer to build the detection, monitoring, and case-management systems that keep our platform compliant and safe at scale.
This role partners closely with Compliance, Risk, and Legal to translate regulatory requirements into engineering systems that protect the platform and its users, with high ownership and direct impact on Polymarket’s risk posture.
What you’ll do
Day-to-day scope for the Senior Backend Engineer, Trust & Safety as described in the posting:
- Build detection and monitoring tooling: Design and build detection, monitoring, and case-management systems to meet AML/BSA, KYC/EDD, and sanctions-screening obligations at scale.
- Integrate surveillance platforms: Build on or integrate with trade-surveillance and case-management platforms (e.g., Eventus, Palantir) and structure audit-grade data pipelines (tiered storage, long-term retention in S3) for compliance and financial-crimes review.
- Reconcile financial data: Model and reconcile financial data (FinOps, ledger reconciliation) to ensure auditability and accuracy of money-movement records.
- Partner with Compliance and Risk: Translate regulatory requirements into engineering systems — alerting, case queues, investigative reporting — in close partnership with Compliance, Risk, and Legal.
- Build real-time risk systems: Develop real-time risk decisioning and transaction-monitoring systems to detect and respond to financial crime.
- Collaborate cross-functionally: Work closely with engineers across the platform to keep Trust & Safety systems tightly integrated with the broader exchange.
What we’re looking for
- Backend engineering experience building detection, monitoring, or case-management tooling for AML/BSA, KYC/EDD, or sanctions-screening obligations at scale.
- Experience integrating or building on trade-surveillance and case-management platforms (e.g., Eventus, Palantir) and structuring audit-grade data pipelines.
- Comfortable modeling and reconciling financial data (FinOps, ledger reconciliation) for auditability and accuracy.
- Track record partnering directly with Compliance, Risk, and Legal teams to translate regulatory requirements into engineering systems.
- Background in risk/fraud or compliance-technology engineering at a fintech or crypto exchange (e.g., Coinbase Risk Engineering, Robinhood Financial Crimes).
- (Plus) Experience building real-time risk decisioning or transaction-monitoring systems at scale.
Benefits
What the posting highlights about the offer:
- Competitive salary & equity
- Unlimited PTO
- Full Health, Vision, & Dental coverage
- 401k match
- Hardware setup — new MacBook Pro, big display, & accessories
Build a standout application
For the Senior Backend Engineer, Trust & Safety at Polymarket, reviewers look for concise evidence over buzzwords. Mirror the language of the posting sparingly, quantify support or delivery outcomes, and show how you handled ambiguity, time-zone collaboration and user empathy. Keep your resume to impact, keep your cover note to one page, and link to artifacts — tickets resolved, docs shipped, dashboards owned — that prove you can operate in a fast-moving Web3 team. Prepare to discuss a time you turned a confusing user report into a clear fix and how you measure quality in support and operations.
Web3 hiring values reliability: on-time follow-through, clear writing, and a track record of improving runbooks and tooling. Treat the application as a work sample. For interviews, be ready to walk through how you prioritize across time zones, handle a difficult user, and decide when to escalate versus resolve directly. Show how you document decisions so the next teammate benefits.
In a distributed Web3 org, trust builds through written clarity. Use the cover note to demonstrate it.