Backend & Applied AI/ML Engineer

eBay•Toronto, ON

About The Position

You will join a collaborative engineering team that builds scalable, reliable backend systems while partnering closely with applied ML engineers, data scientists, and cross-functional product teams. Together, we deliver innovative, AI-enhanced capabilities that power the experiences of millions of buyers and sellers around the world. In this role, you will deepen your backend engineering expertise while contributing to eBay’s expanding AI/ML initiatives. You will design and implement core backend services, integrate AI/ML models into production systems, and help shape the architecture of next-generation, intelligent platform features. This position offers the opportunity to make meaningful technical contributions, work with a highly skilled and geographically distributed team, and influence the development of customer-focused solutions at global scale.

Requirements

Proven software engineering experience with a strong focus on backend systems and production-grade services.
Proficiency in Java/Kotlin and Python, with the ability to write clean, efficient, and maintainable code.
Deep understanding of backend architecture, distributed systems, modular design principles, and core system design fundamentals.
Ability to learn new technologies quickly and effectively leverage AI tools to enhance engineering workflows.
Bachelor’s or Master’s degree in Computer Science or a related field or equivalent practical experience
2-3 years working in software engineering roles.
Excellent communication skills and a track record of collaborating successfully with geographically distributed teams.
A passion for building high-quality, scalable software that delivers meaningful customer impact.

Nice To Haves

Applied AI/ML model integration
Hugging Face
PyTorch
Spring Boot
NoSQL databases
Spark

Responsibilities

Design, build, and maintain backend services and distributed systems that are scalable, reliable, and aligned with eBay’s architectural standards.
Write clean, efficient, testable code in Java/Kotlin and Python.
Apply modular design principles and ensure clear separation of concerns across service boundaries.
Support the integration, deployment, and optimization of AI/ML models to enhance product functionality and system performance.
Partner with cross-functional teams—including ML, data, product, and other engineering groups—to deliver high-quality solutions for eBay’s marketplace.
Use AI-driven tools and modern engineering practices to accelerate development and improve productivity.
Participate in architectural discussions and contribute to shaping the direction of backend and applied AI/ML systems.