Principal Machine Learning Scientist - Search and Personalization

Lead / Staff / Principal

$224,000 – $338,500

Listed on Expedia Group’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

Expedia seeks a principal machine learning researcher to lead the design and optimization of search, recommendations, and generative AI discovery systems that serve millions of travelers. This role is for a deep learning expert ready to architect large-scale production systems, mentor a research team, and push the boundaries of retrieval and personalization in high-impact domains.

Our summary, not Expedia Group’s wording. The full posting is on their site.

Skills this role names

Log in to see which of these are already on your profile.

What they ask for

Required

PhD or MS in Computer Science, Machine Learning, Statistics, or related field, or equivalent professional experience
10+ years of industry experience in machine learning
Production-grade search, recommendation, or personalization systems built
Intent understanding techniques and retrieval methods
Deep learning for recommendations and reinforcement learning
Python and ML frameworks (TensorFlow, JAX, or PyTorch)
Large-scale distributed systems and big data technologies (Spark, Hadoop)
A/B testing and experimentation methodologies
Work with large-scale real-world data including bias, fairness, and privacy considerations
Technical communication with both technical and non-technical audiences
Demonstrated mentorship and technical leadership of research or engineering teams

Nice to have

Travel or e-commerce industry experience
Cloud platforms (AWS, GCP, Azure)
Publications in top-tier ML conferences or journals
Open-source ML project contributions
Personalization systems experience
Track record moving models from prototype to production with ML engineering teams