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. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce. Our Platform Engineering team builds and operates core backend systems that power AI‑driven workflows and developer‑facing capabilities, enabling product teams across eBay to ship faster with higher quality. As a Staff Software Engineer – Backend, you will be a senior technical leader for critical platform services, driving architectural decisions, leading complex cross‑team initiatives, and elevating engineering standards. Responsibilities Lead the design and delivery of large‑scale backend and platform services that power AI‑driven workflows, directly improving developer productivity and product delivery across eBay. Define and evolve backend architectures with a strong focus on scalability, reliability, and maintainability, influencing long‑term platform direction and technical strategy. Drive cross‑functional technical initiatives with product, data, and partner engineering teams, aligning priorities and de‑risking complex, multi‑system projects from design through production. Raise the bar on engineering practices by championing high standards for code quality, testing, observability, automation, and operational excellence across the platform stack. Improve system performance, resilience, and cost efficiency by strengthening monitoring, incident response, and root‑cause analysis for production systems. Mentor engineers across multiple levels, growing technical leadership within the team and fostering a culture of learning, ownership, and continuous improvement. Qualifications 8+ years of professional software engineering experience, including a proven track record designing, building, and operating large‑scale backend systems in production. Strong proficiency in one or more backend languages (Java, Go, Python, or similar) and deep experience with distributed systems, microservices, and cloud‑native development. Hands‑on expertise with databases (SQL and/or NoSQL), messaging systems, API design, and modern cloud platforms (AWS, GCP, or Azure), including container orchestration with Kubernetes. Demonstrated strength in system design, debugging, and performance optimization, with the ability to make thoughtful trade‑offs between speed, quality, and long‑term scalability. Proven ability to influence technical direction without direct authority, collaborating effectively with engineering, product, and business partners and communicating clearly with technical and non‑technical audiences. Experience in platform or developer tooling systems and/or familiarity with AI/ML‑driven or workflow‑based platforms is a plus. The role is based in Toronto, Ontario with a hybrid work model and may require occasional flexibility for key collaboration moments. Compensation and Benefits Base pay range: C$142,400 – C$190,100. Base pay may vary depending on location, skills, and experience. The total compensation package may include a target bonus, restricted stock units (as applicable), and a full range of medical, financial, and other benefits (including RRSP eligibility, various paid time off benefits such as PTO and parental leave). Details of participation in these benefit plans will be provided if an employee receives an offer of employment. Legal Notice 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, 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