Sr. Software Engineer, Auth Tech

eBay; Toronto; On-site; CAD 118,000 - 157,500; Full time

Benefits offered by this job

RRSP eligibility

Paid time off (PTO)

Parental leave

Job summary

eBay in Toronto, Canada, seeks a Senior Backend Software Engineer to design, develop, and maintain the core services powering the authentication platform. You will lead distributed system architecture, ensure high availability and performance, and partner with product managers, cross-functional teams, and DevOps to deliver scalable cloud-native solutions on Google Cloud Platform.

You will mentor junior engineers, conduct code reviews, and raise engineering standards across the team while

Qualifications

• 6+ years of advanced software development experience in building large-scale distributed systems.
• Deep expertise in Java/J2EE and Spring Boot.
• Experience designing and developing APIs using REST and GraphQL.
• Experience in distributed cloud-native environments (GCP preferred).
• Strong knowledge of relational and NoSQL databases, data modeling, and performance tuning.
• Proficient in CI/CD, automated testing, source control, and code quality standards.

Responsibilities

• System Design & Architecture: Define, design, and implement complex distributed software systems; participate in architectural discussions and produce design docs.
• Backend Development: Develop and maintain scalable services using Java/Spring Boot; create robust RESTful and GraphQL APIs.
• Cloud & DevOps: Lead deployment on Google Cloud Platform; implement CI/CD pipelines and IaC principles.
• Operational Excellence: Improve reliability, observability, and performance; troubleshoot production issues and participate in incident management.
• Leadership: Mentor junior team members, conduct rigorous code reviews, and drive engineering standards across the team.

Skills

Java/J2EE

Spring Boot

REST APIs

GraphQL APIs

Cloud (GCP)

CI/CD

Automated testing

Tools

Docker

Kubernetes

Git/GitHub

Terraform

Job description

Senior Backend 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

Authenticity Guarantee is an important initiative at eBay where a select category of items are authenticated by professional authenticators to increase buyer confidence and satisfaction. The Authentication Technology team is responsible for building software for orchestrating the authentication process and storing high-value items. The team is also responsible for building software for warehouse operations, including integration with custom hardware, RFID readers, and Android-based mobile devices.

About The Role

We are seeking a talented and motivated Senior Backend Software Engineer to design, develop, and maintain the core services that power our authentication platform. In this role, you will lead the architecture of distributed systems, ensure high availability and performance, and drive operational excellence through cloud-native best practices. You will work closely with product managers, cross-functional engineering teams, and DevOps to deliver robust, scalable solutions on Google Cloud Platform.

Responsibilities

• System Design & Architecture: Define, design, and implement complex, multi-tier distributed software systems. Participate/lead architectural discussions and produce high-quality design documentation.
• Backend Development: Develop and maintain scalable, high-performance services using Java/Spring Boot. Create and evolve robust RESTful and GraphQL APIs for internal and external integrations.
• Cloud & DevOps: Lead the deployment of services on Google Cloud Platform (GCP). Implement and maintain CI/CD pipelines (e.g., GitHub Actions, Cloud Build) and embrace Infrastructure-as-Code (IaC) principles.
• Operational Excellence: Improve system reliability, observability, and performance. Troubleshoot production issues and participate in incident management.
• Leadership: Mentor junior team members, conduct rigorous code reviews, and drive engineering standards across the team.

Required Qualifications

• Experience: 6+ years of advanced software development experience (or 5+ with a Master’s degree or equivalent professional experience) in building large-scale distributed systems.
• Core Backend Expertise: Deep expertise in Java/J2EE and Spring Boot. Solid understanding of object‑oriented design, design patterns, and caching mechanisms.
• API Proficiency: Extensive hands‑on experience designing and developing APIs using REST and GraphQL.
• Cloud & Data: Proven experience working in a distributed cloud‑native environment (GCP preferred). Strong knowledge of relational and NoSQL database design, data modeling, and performance tuning.
• Engineering Practices: Proficient in professional software engineering practices, including CI/CD, automated testing (unit/integration), source control (Git/GitHub), and code quality standards.

Nice To Have

• Experience with containerization and orchestration (Docker, Kubernetes/GKE).
• Familiarity with event‑driven architectures and distributed processing.
• Experience with infrastructure automation and monitoring tools (Cloud Monitoring, Logging, Terraform).
• Understanding of warehouse operations, logistics, or high‑value item authentication.
• Basic familiarity with front‑end technologies (React) if needed for cross‑team collaboration.

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.

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 [e-mail]. 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.

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