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PolymarketPolymarketNew York, NY

Senior Investigation Analyst

Senior Investigation Analyst protecting prediction market integrity at Polymarket by investigating insider trading, manipulation, fraud, and illicit activity using on-chain forensics and trade surveillance tools. Build defensible cases, respond to legal inquiries, and interface with law enforcement.

Salary not listed
On-site5+ YOEOther

About the role

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.

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.

Skills

chainalysistrm labsellipticeventusvalidusnasdaq smartsSQLPython

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