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Apollo.io Logo Apollo.io · IT - Software Development

Senior Engineer (Fraud)

Canada; United States 154900.00 - 212960.00 USD / Year · Job Posted February 17, 2026
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Job Description

This role sits at the intersection of engineering, security, and fraud operations. The hired candidate will play a critical role in evolving Apollo’s abuse detection and account security capabilities. As a Senior Engineer (Fraud), you’ll work closely with Fraud Operations, Data Science, Application Security, and Product to modernize abuse detection logic. You'll prototype and deploy new risk decisioning systems and build the technical foundation for new fraud decision models over the next several quarters. This role is ideal for a senior engineer who thrives in ambiguous, data-driven problem spaces and enjoys building systems that protect our customers and business.

Job Responsibility

  • Lead the implementation and ongoing improvement of abuse detection services and customer account security features
  • With assistance of technical leadership, implement a home-grown risk decision engine
  • Build and maintain APIs to support extensible, low-latency risk decisioning
  • Research and analyze abuse tools and attacker tactics to inform detection strategies
  • Participate in fraud incident triage and lead development of mitigations and remediation
  • Collaborate with Data Science and Data Engineering on model feature and system design
  • Work closely with Fraud Operations and Application Security to align detection and response
  • Stay informed on fraud prevention trends and apply relevant insights internally

Requirements

  • 5+ years building production backend systems in a SaaS or similar environment
  • Experience designing scalable backend services
  • exposure to risk or decisioning systems a plus
  • Proven track record of designing customer-first features
  • Ability to explore and validate ideas using imperfect or partially structured data
  • Strong foundation in secure system design and layered defenses
  • Comfortable presenting designs to both technical peers and senior stakeholders
  • Familiarity with common abuse vectors, evasion techniques, or scraping patterns
  • Strong ownership mindset and ability to prioritize effectively
  • Fraud, trust & safety, or security-adjacent experience preferred
  • Clear written and spoken English communication

Nice to have

  • Fraud, trust & safety, or security-adjacent experience preferred
  • exposure to risk or decisioning systems a plus

What we offer

  • equity
  • company bonus or sales commissions/bonuses
  • 401(k) plan
  • at least 10 paid holidays per year, flex PTO, and parental leave
  • employee assistance program and wellbeing benefits
  • global travel coverage
  • life/AD&D/STD/LTD insurance
  • FSA/HSA and medical, dental, and vision benefits
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