Sr Software Engineer - Digital Identity

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 and the role The Customer Security team protects millions of eBay customers from digital identity crime, helping people buy and sell with confidence. We are a product engineering team specialising in cybercrime, digital identity, and customer protection. Our mission is to understand how customer identities are compromised, turn intelligence and industry research into actionable insights, and build security capabilities that protect customers across eBay. Our work spans consumer identity and authentication security, cybercrime intelligence, device trust, identity compromise detection, and emerging technologies such as AI agents. We combine industry and product research, adversarial thinking, software engineering, and large-scale data systems to deliver measurable customer protection. We partner closely with Identity Engineering, Authentication, Fraud, Trust, and Risk teams to make these capabilities available throughout the customer journey. We are looking for a Senior Software Engineer with strong engineering fundamentals, substantial consumer identity or related security expertise, and the technical leadership to help shape the future of Customer Intelligence. This role goes beyond researching threats or implementing predefined solutions. You will assess how consumer identity security is evolving across the industry, evaluate products and approaches adopted by other major consumer platforms, and develop evidence-backed views on what eBay should build, improve, or adopt. You will turn those recommendations into technical direction, engineering priorities, and production capabilities. You will provide hands-on technical leadership across complex initiatives, from identifying a problem and evaluating options through architecture, experimentation, delivery, and adoption. You will challenge assumptions constructively, influence decisions across partner teams, and help other engineers deliver effective solutions at consumer-platform scale. What you will accomplish: • Research the industry and shape our direction. Investigate developments in consumer identity, authentication, account protection, digital trust, and AI agent security. Assess competing products, industry practices, emerging technologies, and attacker techniques; identify capability gaps and recommend where Customer Intelligence should invest. • Lead the Customer Intelligence capability technically . Establish credible technical direction, guide engineering priorities and architectural decisions, and lead complex, multi-quarter initiatives. Mentor engineers, resolve technical trade-offs, and coordinate delivery across teams without relying on formal management authority. • Turn research into products. Move from an emerging problem or observed attack technique to a defined customer risk, evaluated options, a proposed product capability, and a production implementation. Use prototypes and measurable evidence to decide what to build, what to integrate, and what not to pursue. • Build impactful security capabilities. Design, develop, and operate scalable intelligenc