Staff Integration Software Engineer

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 We’re building a new integration team in Toronto focused on bringing core eBay capabilities into adjacent marketplace platforms. The team sits at the center of a strategic initiative to deliver marketplace capabilities such as identity, demand generation, payments, and shipping as reusable services, with the potential to expand across additional platforms over time. Role Overview This is a highly hands-on technical leadership role for an experienced backend engineer who can define architecture, write production code, and drive execution in a fast-moving, ambiguous environment. You’ll lead the technical direction for key platform integrations, partnering closely with engineering teams across multiple stacks and geographies while staying deeply involved in implementation. Key Competencies & Responsibilities Lead the technical architecture for a marketplace integration team, from early concept through implementationWrite and ship production code; this role is expected to be heavily hands-onDrive architectural discussions, design reviews, and PR reviews across integration workstreamsTranslate ambiguous business or product goals into clear, scalable technical solutionsPartner closely with engineering teams to integrate services across distinct platforms and tech stacksHelp define how eBay capabilities can be exposed as services for other platforms and future integrationsInfluence engineering best practices around system design, maintainability, and long-term scalability Must-have Requirements Strong hands-on backend engineering experience in JavaProven ability to lead technical architecture and make sound system design decisionsExperience building or integrating distributed systems and service-based architecturesStrong communication skills and the ability to collaborate effectively across teamsComfortable operating in ambiguity and forming a clear technical point of view with incomplete informationStrong individual contributor mindset with a desire to grow as a technical leader rather than a people manager Nice-to-have Requirements Experience with GraphQL, especially federated graph architectures such as ApolloExperience with Scala, Kotlin, or other JVM languagesTypeScript and/or Node.js experienceAWS or other cloud infrastructure experienceFamiliarity with full-stack or web architectureExperience in startup, scale-up, or other high-ambiguity environmentsExperience in marketplace, commerce, or platform-as-a-service style companies Why this role is interesting Greenfield team with meaningful architectural ownershipHigh visibility work tied to eBay’s broader platform integration strategyExposure to multiple modern tech stacks across enterprise and cloud-native systemsStrong growth potential as this pattern expands to additional platforms and future integrationsOpportunity to join a growing Toronto engineering presence with significant local investment Additional Details This job posting relates to an existing vacancy within eBay. 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 talent@ebay.com. We will make every effort to respond to your request for accommodation as soon as possible. View our accessibility statement to learn more about eBay's commitment to ensuring digital accessibility. We use cookies to enhance your experience and may use AI tools for administrative tasks in the hiring process. To learn how we handle your personal data and use AI responsibly, please visit our Talent Privacy Notice, Privacy Center, and AI Hiring Guidelines.