SWE-3 Backend Engineer, ML Systems

Job Summary

As a Backend Engineer, ML Systems you will help build the platforms, services, APIs, data pipelines, and MLOps capabilities that bring cutting edge AI models into production at eBay scale. You will engineer the data pipelines that feed our models, build the infrastructure to train and serve them, and develop the APIs that deliver personalized experiences to millions of users. You will work at the intersection of machine learning and software engineering, solving complex challenges in system design and the operationalization of the latest Generative AI technologies. You will partner closely with Applied Researchers, Product Managers, and Engineering teams to turn prototypes into robust, scalable, low-latency systems for millions of customers.

This is a shared hiring role across Ads teams. Final team placement will be determined after offers based on each candidate s experience, strengths, and fit with the needs of Ads Recommendations, Ads Search, and Ads Guidance.

What you will accomplish:

• Design, build, and operate scalable backend and ML systems supporting sponsored experiences, ranking, retrieval, and personalization.
• Develop and own the MLOps pipelines for continuous integration, continuous delivery (CI/CD), training, validation, and monitoring of all production-grade models.
• Engineer robust data pipelines using big data technologies to process vast datasets for model training and feature engineering.
• Implement and optimize both traditional ML models and state-of-the-art Generative AI models (including LLMs) for low-latency serving and high-throughput environments.
• Collaborate closely with Applied Researchers to translate novel algorithms and research prototypes into hardened, production-ready code.
• Monitor system performance, identify and resolve production issues, and continuously improve the reliability and efficiency of our ML services.

What you will bring:

• BS in Computer Science or related area with 4+ years of relevant work experience in ML / AI / Data Engineering.
• Experience in production engineering practices and software development in an OO language (Scala, Java, Python, etc.).
• Extensive experience in big data distributed processing frameworks, e.g. Apache Hadoop, Spark, Flink.
• Experience with ML frameworks like TensorFlow and PyTorch from a production perspective.
• Proven ability to build and manage CI/CD pipelines for ML models, including proficiency with containerization (Docker, Kubernetes).
• Experience with using cloud services, big data pipelines and databases, e.g. AWS, GCP, Azure.
• Proven ability to design and build scalable, distributed systems and expose their functionality through well-designed RESTful or gRPC APIs.

Links to some of our previous work:

• How eBay Created a Language Model With Three Billion Item Titles
• Complementary Item Recommendations at eBay Scale
• Transforming Fashion Discovery in E-Commerce through Theme-Based Categorization with GenAI
• Scroll into the Future: How eBay s Multi-Arm Bandits Elevate Product Recommendations Through Dynamic Pagination
• Improving eBay s Fashion Fitment Using Size Signals From Search Queries

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.