Senior Machine Learning Scientist – Personalization

Expedia Group

Senior Machine Learning Scientist developing cutting-edge machine learning systems for personalization. Collaborating with cross-functional teams at Expedia Group to enhance travel experiences.

Posted 5/22/2026full-timeSan Jose • California, Washington • 🇺🇸 United StatesSenior💰 $187,000 - $261,500 per yearWebsite

About the role

Key responsibilities & impact

Design, develop, and apply machine learning solutions to real-world personalization, product, and business problems, translating ambiguous opportunities into scalable models, experiments, and production-ready capabilities
Drive end-to-end scientific work across problem formulation, data exploration, feature engineering, model development, evaluation, and iteration, with strong attention to measurable impact
Partner closely with engineers, product, and business stakeholders to integrate machine learning solutions into services and workflows, including system design, API design, and data modeling considerations where applicable
Use strong technical judgment to select appropriate methods, validate outcomes, and improve model performance, reliability, and operational quality across multiple problem domains
Safely integrate and operate AI/ML-enabled solutions that improve outcomes, including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products
Contribute deep technical expertise across related domains, helping raise scientific and engineering quality through experimentation, documentation, mentoring, and reusable approaches that support broader team effectiveness

Requirements

What you’ll need

Bachelor's degree in Computer Science or a related technical field; or Equivalent related professional experience
8+ years of relevant professional experience
Demonstrated ownership of machine learning solutions at the service or multi-service level, including problem definition, model development, evaluation, and operationalization within a product or technical domain
Strong foundation in machine learning methods, statistical analysis, experimentation, and data-driven decision making, with hands-on coding experience in scientific and production-oriented environments
Experience working with cross-functional partners to deploy technical solutions, with core expectations in scalable model development, data modeling, and integration into software systems

Benefits

Comp & perks

medical/dental/vision
paid time off
Employee Assistance Program
wellness & travel reimbursement
travel discounts
International Airlines Travel Agent (IATAN) membership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

machine learningdata explorationfeature engineeringmodel developmentmodel evaluationstatistical analysisdata-driven decision makingAPI designdata modelingAI/ML concepts

Soft Skills

problem formulationtechnical judgmentcollaborationmentoringdocumentationexperimentationownershipattention to detailcommunicationteam effectiveness

Certifications

Bachelor's degree in Computer Sciencerelated technical field