Senior Investigation Analyst

Polymarket•New York, NY

About The Position

Polymarket 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.

Requirements

5–7+ 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 evidence
Working knowledge of order-book mechanics and manipulation typologies (spoofing, layering, wash trading), or blockchain analysis and on-chain typologies — ideally both
Direct 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 on
Sound judgment evaluating and responding to legal and regulatory requests under real deadlines
Genuine comfort with ambiguity — a meaningful share of what you'll investigate won't map to a category that already exists

Nice To Haves

Experience with prediction markets or other crypto-native platforms
SQL or Python, used to test your own hypotheses against trade or on-chain data
Prior experience serving as a point of contact for law enforcement or regulators

Responsibilities

Investigate insider trading, coordinated wallet activity, spoofing, and other market integrity matters from initial signal through a documented, defensible finding
Trace wallets, funding flows, and transaction history using tools such as Chainalysis to identify coordination and test hypotheses
Review spoofing, layering, and related order-book manipulation using trade-surveillance tooling (e.g., Eventus/Validus) alongside on-chain evidence
Evaluate and respond to subpoenas and legal process, assessing risk and sensitivity and meeting binding deadlines
Write investigative reports and findings that hold up to scrutiny from leadership, law enforcement, or outside counsel
Stay current on manipulation and fraud patterns as prediction markets and the underlying blockchain ecosystem evolve