Backend & Applied AI/ML Engineer

Join eBay's collaborative engineering team to build scalable, reliable backend systems and integrate AI/ML models into production. This role involves designing and implementing core backend services, shaping the architecture of intelligent platform features, and partnering with cross-functional teams to deliver innovative, AI-enhanced capabilities for millions of buyers and sellers globally. You will deepen your backend expertise while contributing to eBay’s expanding AI/ML initiatives.

Must Have

• Design, build, and maintain scalable, reliable backend services and distributed systems.
• Write clean, efficient, testable code in Java/Kotlin and Python.
• Apply modular design principles and ensure clear separation of concerns.
• Support integration, deployment, and optimization of AI/ML models.
• Partner with cross-functional teams to deliver high-quality solutions.
• Proven software engineering experience with a strong focus on backend systems.
• Deep understanding of backend architecture, distributed systems, and system design fundamentals.
• 6-8 years working in software engineering roles.
• Bachelor’s or Master’s degree in Computer Science or a related field.

Good to Have

• Experience with Applied AI/ML model integration.
• Experience with Hugging Face.
• Experience with PyTorch.
• Experience with Spring Boot.
• Experience with NoSQL databases.
• Experience with Spark.

Perks & Benefits

• Target bonus
• Restricted stock units
• Medical benefits
• Financial benefits
• 401(k) eligibility
• Paid time off (PTO)
• Parental leave

About the team and role

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.

What You Will Accomplish

• 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.

What You Will Bring

• 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.
• Strongly preferred experience with:
• Applied AI/ML model integration
• Hugging Face
• PyTorch
• Spring Boot
• NoSQL databases
• Spark
• 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.
• 6–8 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.