Senior Machine Learning Scientist

Expedia Group

Senior Machine Learning Scientist at Expedia Group developing solutions to improve post-booking customer experience. Collaborating with cross-functional teams to design and implement machine learning models.

Posted 4/23/2026full-timeSan Jose • California, Washington • 🇺🇸 United StatesSenior💰 $173,000 - $242,500 per yearWebsite

Tech Stack

Tools & technologies

PandasPySparkPythonPyTorchScikit-LearnSQLTensorflow

About the role

Key responsibilities & impact

Build and evaluate GenAI- and LLM-powered solutions and AI agents that improve post-booking customer experience, including recommendations, customer service, and trip management.
Owns end-to-end ML and GenAI projects—from problem framing and data preparation through model/agent design, orchestration, deployment, and continuous evaluation.
Apply deep expertise in applied ML, Generative AI, and rigorous experimentation to design robust evaluation frameworks (A/B tests, offline metrics, qualitative assessments).
Partner closely with product, engineering, and operations while mentoring junior scientists and helping define best practices for AI agent development and evaluation.

Requirements

What you’ll need

PhD in a quantitative field (e.g., Computer Science, Statistics, Mathematics, Physics, Economics, Operations Research) and ~3+ years of industry experience; or Master’s degree in a quantitative field with ~5+ years of relevant industry experience.
Proven track record of building and deploying ML models that meaningfully impact business metrics in a production environment.
Strong knowledge of machine learning theory and practice (e.g., supervised learning, representation learning, ranking/recommendation, deep learning).
Solid grounding in statistics, experimental design (A/B testing), and basic causal inference; comfortable designing and analyzing online experiments.
Strong programming skills in Python and its data/ML ecosystem (e.g., pandas, scikit-learn, PyTorch/TensorFlow, PySpark), plus proficiency in SQL.
Hands-on experience using GenAI / LLM APIs (e.g., OpenAI, Hugging Face, Anthropic, Gemini) in prototypes or production is highly desired.

Benefits

Comp & perks

health insurance
dental insurance
vision insurance
paid time off
Employee Assistance Program
wellness & travel reimbursement
travel discounts
International Airlines Travel Agent membership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

machine learningGenerative AIdeep learningA/B testingexperimental designPythonSQLdata preparationmodel designmodel deployment

Soft Skills

mentoringcollaborationproblem framingcommunicationbest practices definition

Certifications

PhDMaster’s degree