Apollo.io - Senior Engineer (Fraud)
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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 • Our tech stack is React/Redux/NodeJS on the frontend, Ruby/Ruby on Rails/MongoDB/Elasticsearch on the backend, and Kubernetes/Docker/Ansible/Terraform in infrastructure. • Apollo.io Tech Blog: Deep dives into engineering, product design, and company-culture stories from the Apollo team, offering behind-the-scenes insight into how Apollo builds and scales its B2B sales platform. • Apollo.io Tech Blog: • The listed Pay Range reflects the total cash compensation inclusive of annual base salary and annual bonus as applicable. For sales roles, the range provided is the role’s On Target Earnings ("OTE") range, meaning that the range includes both the sales commissions/sales bonus target and annual base salary for the role. This salary range may be inclusive of several career levels at Apollo and will be narrowed during the interview process based on a number of factors, including the candidate’s experience, qualifications, and location. Applicants interested in this role who are not located in the US may request the annual salary range for their location during the interview process. • Additional benefits for this role may include: 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. • Tier 1 Pay Range (San Francisco, New York City, Seattle) • $154,900 - $212,960 USD • Tier 2 Pay Range (All other US Locations) • We are AI Native • Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here.
Responsibilities
• 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. • Senior Engineer (Fraud) • 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 • all for one • bold ideas and courageous action • If you’re looking for a place where your work matters, where you can push boundaries, and where your career can thrive—Apollo is the place for you. • Learn more here!
Benefits
• At Apollo, we’re driven by a shared mission: to help our customers unlock their full revenue potential. That’s why we take extreme ownership of our work, move with focus and urgency, and learn voraciously to stay ahead. • take extreme ownership • move with focus and urgency • learn voraciously • We invest deeply in your growth, ensuring you have the resources, support, and autonomy to own your role and make a real impact. Collaboration is at our core—we’re all for one, meaning you’ll have a team across departments ready to help you succeed. We encourage bold ideas and courageous action, giving you the freedom to experiment, take smart risks, and drive big wins.
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