Senior Investigation Analyst

About PolymarketPolymarket 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 a Senior Investigation Analyst to help protect the integrity of its markets. Market Integrity's remit covers insider trading, market manipulation, spoofing and order-book abuse, coordinated multi-account activity, bot and automated-trading abuse, sanctions and illicit-finance exposure, and account takeover and fraud.You'll own investigations end to end and serve as a point of contact for law enforcement and regulatory inquiries into suspicious activity — using on-chain analysis, vendor surveillance tools, and referrals from across the company to build cases from initial signal through documented, defensible findings.What You'll DoInvestigate insider trading, coordinated wallet activity, spoofing, and other market integrity matters from initial signal through a documented, defensible findingTrace wallets, funding flows, and transaction history using tools such as Chainalysis to identify coordination and test hypothesesReview spoofing, layering, and related order-book manipulation using trade-surveillance tooling (e.g., Eventus/Validus) alongside on-chain evidenceEvaluate and respond to subpoenas and legal process, assessing risk and sensitivity and meeting binding deadlinesWrite investigative reports and findings that hold up to scrutiny from leadership, law enforcement, or outside counselStay current on manipulation and fraud patterns as prediction markets and the underlying blockchain ecosystem evolveWhat We're Looking For5–7+ years of investigative experience in trade surveillance, market structure or regulation, blockchain forensics, financial crimes, law enforcement, or a comparable field involving building cases from ambiguous evidenceWorking knowledge of order-book mechanics and manipulation typologies (spoofing, layering, wash trading), or blockchain analysis and on-chain typologies — ideally bothDirect experience with blockchain analysis tools (e.g., Chainalysis, TRM Labs, Elliptic) or trade-surveillance platforms (e.g., Eventus/Validus, Nasdaq SMARTS)A track record of building a case from limited initial indicators and documenting it clearly enough to act onSound judgment evaluating and responding to legal and regulatory requests under real deadlinesGenuine comfort with ambiguity — a meaningful share of what you'll investigate won't map to a category that already exists(Plus) Experience with prediction markets or other crypto-native platforms(Plus) SQL or Python, used to test your own hypotheses against trade or on-chain data(Plus) Prior experience serving as a point of contact for law enforcement or regulatorsBenefitsCompetitive salary & equityUnlimited PTOFull Health, Vision, & Dental coverage401k matchHardware setup: new MacBook Pro, big display, & accessoriesLocationNew YorkEmployment TypeFull timeLocation TypeOn-siteDepartmentData