Machine Learning Scientist III

At Expedia Group, we power global travel for everyone, everywhere. Our mission is to design cutting-edge technology that makes travel smoother and more memorable, while creating groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential to our success.

To shape the future of travel, we believe that people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs. Here, differences are celebrated, and we know that when one of us wins, we all win.

We offer a comprehensive benefits package that includes:

• Exciting travel perks
• Generous time-off
• Parental leave
• A flexible work model (with some pretty cool offices)
• Career development resources

All of this is designed to fuel your passion for travel and ensure a rewarding career journey. We’re building a more open world—join us!

The Search AI team, part of Expedia Product & Technology, is on the lookout for a Machine Learning Scientist III to help shape the next generation of ranking systems. You’ll work on cutting-edge applications of Large Language Models (LLMs) and Generative AI, combining them with proven machine learning techniques to enhance personalization and traveler experience at scale.

In this role, you will:

• Research and design innovative ML and GenAI approaches for large-scale ranking and personalization.
• Build, test, and deploy ML models into production, validating performance through online experimentation.
• Collaborate with engineers, analysts, and product partners to deliver robust, scalable, and business-driven solutions.
• Translate complex technical results into clear insights and recommendations for both technical and non-technical audiences.
• Stay current with advances in ML and GenAI to drive innovation within the team.

• Master’s degree or Ph.D. in Computer Science, Statistics, Math, Engineering, or a related technical field; or equivalent professional experience.
• 4+ years of applied Machine Learning experience, with models built and maintained in a production environment.
• High proficiency in Python and modern ML frameworks such as PyTorch or TensorFlow.
• A strong foundation in Machine Learning fundamentals, statistics, and experimentation.

• Experience with ranking or recommender systems.
• Experience with recent Large Language Models (LLMs), including fine-tuning, efficient deployment, and architectures.
• Comfortable working with large-scale data and distributed systems (e.g., Spark).
• Effective communication skills and experience working across disciplines to solve complex problems.

This role is based in London , in alignment with our flexible work model, which requires employees to be in-office at least three days a week. Relocation assistance may be considered for qualified candidates.

If you need assistance with any part of the application or recruiting process due to a disability or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team.

We are proud to be named a Best Place to Work on Glassdoor in 2024 and recognized for our award-winning culture by organizations like Forbes, TIME, and Disability:IN.

Join us at Expedia Group, where our family of brands includes:

• Brand Expedia®
• Hotels.com®
• Expedia® Partner Solutions
• Vrbo®
• trivago®
• Orbitz®
• Travelocity®
• Hotwire®
• Wotif®
• ebookers®
• CheapTickets®
• Expedia Group™ Media Solutions
• Expedia Local Expert®
• CarRentals.com™
• Expedia Cruises™

Expedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, religion, gender, sexual orientation, national origin, disability, or age.

Compétences idéales

• Machine Learning
• PyTorch
• Python
• Statistics
• TensorFlow

• London, England, United Kingdom

Expérience professionnelle

• Machine Learning
• Search
• Data Analyst

Compétences linguistiques

• English