Digital Identity & Cybercrime Engineer

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About the role

At eBay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work — every day. We're in this together, sustaining the future of our customers, our company, and our planet. Join a team of passionate thinkers, innovators, and dreamers — and help us connect people and build communities to create economic opportunity for all. About the team The Customer Security team protects millions of eBay customers from digital identity crime. We are a Customer Security product team specialising in Cybercrime & Abuse whose mission is to understand how digital identities are compromised, engineer intelligence from that understanding, and build the security capabilities that protect customers across the eBay platform. Our products are the security intelligence, trust signals, detection capabilities, and data platforms that enable secure consumer identity at scale. We continuously collect, enrich, correlate, and operationalise intelligence from cybercrime ecosystems - including phishing infrastructure, credential theft, infostealer malware, breached credential datasets, malicious infrastructure, identity abuse campaigns, and proprietary eBay telemetry. We transform that intelligence into production-grade security capabilities that protect customers throughout the identity lifecycle. We partner closely with Identity Engineering, Authentication, Fraud, Trust, Product Security, and Risk teams to embed security directly into authentication, account recovery, high-risk customer journeys, and emerging identity technologies. The Role We are looking for a Senior Software Engineer with deep security instincts and strong engineering capability to build the next generation of customer protection systems for digital identity. This is an engineering-first security role. You will build distributed systems, intelligence platforms, data pipelines, APIs, and security services that help eBay determine whether an identity should be trusted—not simply whether credentials are valid. The role combines software engineering, cybercrime research, large-scale data engineering, security analytics, distributed systems, and adversarial thinking. You should be comfortable investigating attacker techniques one day and deploying production systems the next. You will help shape how eBay detects compromised identities, establishes trust in consumer devices, builds reusable identity intelligence, and secures the next generation of AI-assisted consumer experiences. What You'll Do Build Digital Identity Intelligence • Design and build production systems that transform cybercrime intelligence into reusable identity trust signals. • Engineer scalable data pipelines that ingest and enrich intelligence from phishing campaigns, infostealer ecosystems, credential marketplaces, breach datasets, malware telemetry, and internal eBay security signals. • Correlate external intelligence with proprietary customer telemetry to identify compromised identities before fraud or account takeover occurs. • Develop reusable security datasets that improve identity confidence across authentication, account recovery, fraud prevention, and high-risk customer interactions. Build Device Intelligence • Engineer device intelligence platforms that distinguish trusted customer devices from attacker-controlled infrastructure. • Develop capabilities for device reputation, device binding, trusted device establishment, device graph

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