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Fraud Prevention Specialist

Félix
Miami, USA
Full-time
Mid Level
Hybrid
Discovered 1 months ago

Full Job Posting

Responsibilities

  • Run proactive, hypothesis-driven analysis to identify new fraud patterns, coordinated attacks, and emerging threats across the Félix ecosystem.
  • Build and maintain complex SQL queries to deep-dive suspicious activity and expose fraud rings, mule networks, and account-takeover behavior.
  • Monitor core fraud metrics (chargeback ratio, approval/pass rate, false positive rate, loss rate) to detect anomalies early and shorten time-to-detection.
  • Connect disparate data points across products, channels, and time windows to identify sophisticated fraud and structural vulnerabilities.
  • Design, prototype, and validate detection rules — sizing expected fraud capture, false positive impact, and customer friction before rollout.
  • Deploy containment rules during active attacks and monitor performance in real time, adjusting thresholds as attacker behavior shifts.
  • Continuously review rule performance and retire or tune logic that is decaying, over-triggering, or no longer earning its false positive cost.
  • Document rule intent, logic, and expected impact so decisions remain auditable and reversible.
  • Act as the primary technical team member in the Fraud Investigations team, converting operational observations into structured analysis and reusable queries.
  • Partner with Fraud Strategy, Data, ML, Product and Operations on rule logic, coverage gaps, and prevention roadmap priorities grounded in your findings.
  • Translate complex findings into clear recommendations for technical and non-technical stakeholders, including leadership.
  • Master our data tooling and underlying SQL tables, and improve investigator workflows and self-serve access over time.

Requirements

  • High proficiency in SQL, including navigating complex, unfamiliar schemas to extract insight under time pressure.
  • Proven experience identifying fraud patterns, preferably in Fintech, Payments, or Remittances.
  • Practical understanding of fraud controls and their tradeoffs — rule logic, thresholds, precision vs. recall, and the business cost of false positives.
  • Ability to translate data findings into clear, actionable language for both technical and non-technical audiences.
  • Strong ability to connect the dots across disparate data points to uncover organized fraud and systemic gaps.
  • A self-starter mindset: you operate with little guidance and have a strong bias for action.
  • Experience owning or tuning production fraud rules in a real-time decisioning environment.
  • Familiarity with risk platforms and vendor signals and chargeback/dispute lifecycles.
  • Exposure to ML-assisted fraud scoring and model/rule governance processes.
  • Knowledge on AI tools to enhance Fraud Investigative work
  • These are the applicable requisites, although equivalent competencies in any of the above will also be considered.

What We Offer

  • Competitive salary
  • Initial stock options grant
  • Annual performance bonus
  • Health, dental, and vision plans
  • Remote work environment, although we have offices in Miami and México City and would love to work in hybrid model if you are up to it.
  • Continuous learning opportunities
  • Unlimited PTO
  • Paid parental leave
  • Empowering opportunities for growth in a dynamic entrepreneurial environment

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