Senior Machine Learning Scientist

Senior Machine Learning Scientist

The Senior Machine Learning Scientist is responsible for building and evaluating 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. Applies deep expertise in applied ML, Generative AI, and rigorous experimentation to design robust evaluation frameworks (A/B tests, offline metrics, qualitative assessments) that ensure agents are safe, effective, and aligned with business goals. Partners closely with product, engineering, and operations while mentoring junior scientists and helping define best practices for AI agent development and evaluation.

Are you passionate about using machine learning to improve customer experience at scale? Would you like to work in the fast-paced, competitive, customer-focused, and data-rich world of online travel?

Our Machine Learning and Data Science team is growing. We are looking for a Senior Machine Learning Scientist to help tackle some of the most complex customer experience problems in the travel domain. You will develop state-of-the-art machine learning and AI solutions to power and enhance the customer experience across highly complex post‑booking recommendations, customer service, and trip management use cases.

You will tackle substantial technical challenges, from inference problems on long-tail traveler data to multi-objective optimization in a highly dynamic, operationally complex customer service environment. Your passion for the craft of machine learning, causal inference, and Generative AI will unlock tangible growth for our business by exploiting rich datasets and building effective solutions for travelers and our partners.

This is your opportunity to build core algorithms that help Expedia Group's Post Booking organization bring context and intelligence to every step of the traveler journey and redefine what service excellence in travel can be. We are looking for a hands-on senior scientist who can independently drive impactful projects, mentor others, and collaborate closely with partners to make travel more seamless for millions of customers and partners worldwide.

In this role, you will:

• Design & Implement ML Solutions
• Applied Machine Learning & Data Science
• Generative AI & Advanced Techniques
• Statistics, Experimentation & Model Design
• Collaboration, Communication & Visualization
• Stakeholder & Project Management

Experience & Qualifications:

• Experience & Education
• Functional & Technical Skills
• Problem Solving & Communication
• Highly Desired Experience

If you're excited about building impactful ML and AI solutions that improve how millions of travelers are served every day, we'd love to hear from you.