Applied Researcher
Core
Design, develop, and deploy scalable machine learning models and services for ad ranking, recommendation, and advertiser optimization within eBay's advertising systems.
Role type
Senior Machine Learning Engineer (Advertising)
Builds
End-to-end ML and data-driven advertising systems powering ad serving and advertiser-side optimization
Domain
Ecommerce advertising, machine learning, recommendation systems
Deliverable
production ML models
Required skills
Python, Scala, PyTorch, Huggingface, Ray, vLLM, Hadoop, Spark, SQL, deep learning, GenAI, system design, data structures, algorithms
Preferred skills
None stated
Technologies
PyTorch, Huggingface, Ray, vLLM, Hadoop, Spark
Responsibilities
Design and deploy scalable ML models for ad ranking and recommendation; Analyze large-scale production data to define problem spaces and identify ML opportunities; Own the full ML lifecycle from feature engineering to monitoring; Collaborate with product managers and engineers to translate business goals into ML solutions; Define and track key system metrics like relevance, revenue, latency, and reliability; Provide technical guidance to junior engineers
Seniority
Senior, hands-on IC
