Senior ML Scientist, Search & Auction Tech

Expedia, Inc.; Greater London; Hybrid; GBP 90,000 - 150,000; Full time

Job summary

Expedia Group is seeking a Senior Machine Learning Scientist to provide technical leadership in our Search Marketing & Tech organization. You will own end-to-end ML solutions, defining architecture, data contracts, and deployment with multi-quarter initiatives that drive measurable business outcomes.

Design robust training, evaluation, and serving pipelines, while mentoring others and shaping technical direction across teams. Strong Python, ML libraries, and SQL skills are essential.

Qualifications

• Advanced ML expertise with a track record in real-world production.
• Experience leading multi-stakeholder ML initiatives with measurable impact.
• Strong experimentation, statistics, and causal inference skills.

Responsibilities

• Lead end-to-end ML solutions, from problem framing to post-launch iteration.
• Design and deploy production-grade ML models with robust pipelines.
• Collaborate with engineering, product, and business stakeholders.

Skills

Deep ML

Production ML

Leadership & collaboration

Experimentation & statistics

Python proficiency

Causal inference

Ad tech / auctions

Education

Master’s or PhD in CS/Stats/OR or related field

Tools

Python

TensorFlow

PyTorch

scikit-learn

SQL

Spark

Hive

Pandas

NumPy

Job description

Expedia Group is seeking a Senior Machine Learning Scientist to provide technical leadership in our Search Marketing & Tech organization. You will own end-to-end ML solutions, defining architecture, data contracts, and deployment with multi-quarter initiatives that drive measurable business outcomes.

Design robust training, evaluation, and serving pipelines, while mentoring others and shaping technical direction across teams. Strong Python, ML libraries, and SQL skills are essential.