Principal Engineer, ML
Core
Define and lead the technical vision for Coupang's Ads Serving & ML Platform, powering large-scale machine learning and AI for advertising, retrieval, ranking, and auction systems.
Role type
Principal Engineer (Ads Serving & ML Platform)
Builds
End-to-end ad serving ecosystem including retrieval, ranking, auction, targeting, and ML infrastructure
Domain
E-commerce, Advertising, Machine Learning, Distributed Systems
Deliverable
production ML models
Required skills
Large-scale distributed systems architecture, Machine learning systems design, Large language models (LLMs) and foundation models, Retrieval and ranking algorithms, GPU/CPU system optimization, Cross-functional technical leadership, Java/C++/Python
Preferred skills
E-commerce marketplace experience, Real-time machine learning, Platform modernization, PhD in CS/ML/AI
Technologies
Java, C++, Python, LLMs, RAG, GPU/CPU systems
Responsibilities
Define long-term technical vision and architecture for ads serving systems, Lead design of retrieval, ranking, and auction systems, Drive adoption of emerging AI technologies, Partner with product and business leaders to align technical direction, Influence engineering excellence across organizations, Establish best practices for reliability and scalability
Seniority
Principal, hands-on IC with strategic leadership
