Senior Payment Risk Analyst

Polymarket•New York, NY

About The Position

Polymarket is seeking a Senior Payment Risk Analyst to join their Payments Risk team within the US Exchange. This role is crucial for managing the risk posture of all money movement on the platform, including deposits, withdrawals, and settlement payouts. The Senior Payment Risk Analyst will operate at the intersection of fraud operations, payment rail mechanics, and regulatory compliance. Responsibilities include investigating live cases, monitoring transaction data, tuning fraud rules, and maintaining relationships with banking, card network, and processor partners. The role requires proactive identification and closure of control gaps, working closely with Engineering, Compliance, Legal, and InfoSec. This is a challenging position in a dynamic, high-growth environment where payment volumes can spike significantly, fraud patterns shift rapidly, and regulatory expectations are high.

Requirements

8 or more years of hands-on experience in payments risk, fraud risk, or transaction monitoring at a fintech, exchange, payments company, bank, or comparable regulated financial services business.
Direct experience with ACH, wire, card networks (Visa and Mastercard), and at least one real-time payment rail (RTP or FedNow), including their dispute mechanics, chargeback rules, and associated fraud patterns.
Working knowledge of BSA/AML fundamentals and how payments risk and AML risk overlap, including SAR filing, structuring detection, and transaction monitoring systems.
Demonstrated experience setting quantitative risk thresholds, such as velocity limits and chargeback ratios, and defending those decisions to internal stakeholders, processors, banks, and card networks.
Strong written communication skills. This role produces risk memos and reporting for senior stakeholders on a regular basis. You need to write clearly and argue a position well.
Experience auditing a payment stack end to end, identifying where controls are missing or miscalibrated, and building the case for what needs to change.

Nice To Haves

Familiarity with CFTC-regulated environments or other derivatives/exchange contexts.
Experience working in a high-growth environment where payment volumes scale quickly and the risk surface changes fast.
Exposure to crypto or blockchain-adjacent payment flows.

Responsibilities

Investigate live payment fraud cases across deposits, withdrawals, and settlement payouts, making timely decisions on holds, reversals, and account actions.
Monitor transaction data for anomalies tied to high-volume market events, distinguishing normal volume spikes from genuine abuse signals.
Write and tune fraud detection rules in response to emerging patterns, using transaction data to set thresholds that can be defended quantitatively.
Identify control gaps across the full payment stack, then work directly with Engineering, Compliance and InfoSec to get those gaps closed.
Own relationships with payment processors, card networks, and banking partners on risk-related matters, including chargeback disputes, ratio management, and compliance inquiries.
Produce clear, well-reasoned risk memos and committee-level reporting that translate payment risk findings into decisions for non-risk stakeholders.
Maintain and improve the team's core fraud and payment risk documentation, including policies, runbooks, and week-over-week metric tracking.