Senior Engineer I (Fraud)

Apollo.io

8d

About The Position

This role sits at the intersection of backend engineering, security, and fraud operations, and will play a critical role in evolving Apollo’s abuse detection and account security capabilities.
As a Senior Engineer I (Fraud), you’ll work closely with Fraud Operations, Data Science, Application Security, and Product to modernize abuse detection logic, prototype and deploy new risk decisioning systems, and build the technical foundation for a fraud decision engines 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 directly protect customers and the business.

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
• Clear written and spoken English communication

Nice To Haves

• Fraud, trust & safety, or security-adjacent experience preferred

Responsibilities

• Lead the implementation and ongoing improvement of abuse detection services and customer account security features
• With assistance of team manager, 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 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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed