Senior Software Engineer, AI Platform

Posted 24 Days Ago
Be an Early Applicant
Toronto, ON, CAN
In-Office
118K-158K Annually
Senior level
eCommerce • Retail
The Role
Design and develop scalable backend services and APIs for an AI-powered platform, focusing on system architecture and mentoring junior engineers.
Summary Generated by Built In

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:This role sits within eBay’s engineering organization and is focused on building a next-generation AI-powered platform that transforms how software is designed, developed, and delivered at scale. Our Platform Engineering team builds and operates backend services that power intelligent workflows and developer-facing capabilities, enabling product teams across eBay to move faster while maintaining high quality and performance. As a Senior Software Engineer – Backend, you will architect and develop core platform services, solving complex technical problems and shaping scalable solutions for critical platform features. You will partner closely with engineers, product managers, and cross-functional teams, while mentoring junior engineers and contributing to an inclusive, learning-focused culture that values ownership, thoughtful collaboration, and sustainable work/life balance.What you will accomplish:
  • Design, build, and evolve scalable backend services and APIs that power intelligent workflows and developer-facing capabilities, directly improving developer productivity and delivery speed.
  • Drive system architecture and technical decisions with a focus on performance, reliability, and maintainability, simplifying systems and reducing technical complexity where possible.
  • Own end-to-end delivery of features and services from design through production, upholding high standards for code quality, testing, and operational readiness.
  • Improve system performance, scalability, and efficiency by proactively identifying bottlenecks, strengthening observability, and effectively troubleshooting production issues.
  • Collaborate closely with product, data, and partner engineering teams to deliver impactful solutions, clearly communicating technical trade-offs, risks, and progress.
  • Mentor and support junior engineers, sharing knowledge, reinforcing engineering guidelines, and continuously adopting new technologies and approaches to raise the bar for the team.
What you will bring:
  • 5+ years of professional software engineering experience, including building and operating backend systems in production and delivering features or services end-to-end.
  • Proficiency in one or more backend programming languages such as Java, Go, Python, or similar, with a solid understanding of distributed systems, microservices, and service-based architectures.
  • Hands-on experience with databases (SQL and/or NoSQL), APIs, messaging systems, and familiarity with cloud platforms (such as AWS, GCP, or Azure) and container technologies.
  • Strong system design, debugging, and problem-solving skills, with awareness of performance, reliability, and operational trade-offs in real-world environments.
  • Effective collaboration and communication skills, with experience working closely with product managers and cross-functional partners and explaining technical concepts to diverse audiences.
  • Experience with platform or developer tooling, AI/ML or workflow-based systems, and/or observability, monitoring, and production operations is a plus; role location and hybrid expectations to align with eBay’s local site guidelines.

Additional Details

The base pay range for this position is expected in the range below:

C$118,000 - C$157,500

Base pay offered may vary depending on multiple individualized factors, including location, skills, and experience. The total compensation package for this position may also include other elements, including a target bonus and restricted stock units (as applicable) in addition to a full range of medical, financial, and/or 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.

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 [email protected]. 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.

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The Company
HQ: San Jose, CA
26,035 Employees

What We Do

eBay Inc. is a global commerce leader that connects millions of buyers and sellers around the world. We exist to enable economic opportunity for individuals, entrepreneurs, businesses and organizations of all sizes. Our portfolio of brands includes eBay Marketplace and eBay Classifieds Group, operating in 190 markets around the world. We offer sellers the ability to grow a business with little barrier to entry regardless of size, background or geographic location. We never compete with our sellers. We win when our sellers succeed. Buyers who shop on our Marketplace and Classifieds platforms enjoy a highly personalized experience with an unparalleled selection at great value.

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