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. The Role As a Staff Full Stack Engineer, you will own end‑to‑end delivery across the full stack – from immersive frontend experiences to robust backend services and data pipelines. You will leverage AI throughout the development lifecycle and help establish best practices for AI‑assisted engineering across the team. You will also contribute to building AI‑powered advertising features, working with ML engineers to integrate LLM and agentic capabilities into eBay’s ad products. About The Team Join eBay’s Ad‑Tech Innovation Team! eBay is on a mission to revolutionize the advertising landscape with state‑of‑the‑art ad‑tech solutions. We aim to optimize ad monetization and enhance user experiences, creating value for both buyers and sellers. By driving performance through innovative Ads, we’re rapidly innovating in the ad‑tech space. We’re seeking a motivated Full Stack Engineer who is excited about tackling new challenges and is passionate about technology. Learn About Our Work eBay Advertising Insights: eBay Advertising Promoted Listings on eBay: eBay Seller Center – Promoted Listings Key Responsibilities Design and implement innovative features for eBay sellers and advertisers to showcase their products and manage their advertising campaigns effectively. Develop and maintain scalable, highly available user‑facing applications and RESTful APIs. Own end‑to‑end system design for complex, multi‑service features – from technical design documents through implementation, rollout, and production monitoring. Lead architectural decisions across team boundaries, defining APIs, data models, and cross‑service integration patterns that accommodate future scale. Design systems that evaluate trade‑offs across reliability, performance, cost, and operational complexity; drive cross‑team technical alignment on shared infrastructure and platform improvements. Utilize HTML/CSS, React, Node.js, Java, and Scala in system development. Leverage AI‑assisted development tools and agentic workflows throughout the engineering lifecycle – from code generation and debugging to automated PR reviews, test creation, and CI/CD optimization. Champion AI‑augmented engineering practices across the team, driving adoption of tools like GitHub Copilot, Claude Code, and internal AI platforms to accelerate development velocity. Contribute to building AI‑powered advertising features by collaborating with ML engineers on LLM integrations, recommendation systems, and intelligent campaign management capabilities. Learn and apply new technologies as needed, both from external sources and eBay‘s internal tech stack. Participate in our internal open‑source community to share and collaborate on projects and codebases. Commit to a continuous integration and deployment pipeline, ensuring smooth and quick releases. Work within a multi‑disciplinary Agile team to deliver incremental value to our customers swiftly. Engage in technical discussions, contribute to decision‑making processes, and share expertise with your colleagues. Job Requirements Basic Qualifications BS/BA in Computer Science or related field with 10+ years of experience, or MS with 7+ years. Frontend Strong HTML5/CSS3 and responsive web fundamentals. Experience with React (preferred) or equivalent modern framework (hooks, state management). Backend Node.js (BFF/API layer – Express, Fastify, or similar). Java 17+ with Spring Boot. Experience building scalable RESTful APIs and production web applications. Message queues (Kafka, RabbitMQ, or similar). Relational (Oracle/Postgres/MySQL) and NoSQL (Cassandra/MongoDB) databases – schema design and query optimization. System Design & Core Skills Strong system design experience for distributed, high‑traffic systems with a track record of evaluating trade‑offs (consistency, availability, latency, cost) and driving technical alignment across teams. Ability to lead end‑to‑end design (technical docs, design reviews, architecture decisions). Solid computer science fundamentals (data structures, algorithms). Other / Tools & Practices Experience with CI/CD tools (Jenkins, GitHub Actions). Experience with AI‑assisted development tools (e.g., Copilot, Cursor). Ability to build LLM workflows or AI‑driven automation. Nice‑to‑Haves Scala. Exposure to GraphQL and experience in building Federated GraphQL APIs is highly desirable. Experience building or integrating LLM‑powered features, agentic workflows, or AI‑driven automation in production systems is a plus. Showcasing contributions to open source, private GitHub repositories, side projects, etc., is advantageous. Equal Opportunity Employer eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at We will make every effort to respond to your request for accommodation as soon as possible. #J-18808-Ljbffr