Senior Machine Learning Scientist - Personalization11105 Expedia, Inc. • San Jose, Arizona, United States

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Senior Machine Learning Scientist - Personalization

11105 Expedia, Inc.

San Jose, Arizona, United States

San Jose, Arizona, United States

Über

Senior Machine Learning Scientist – Personalization The Unified Personalization Service (UPS) team is part of Expedia Product & Technology. UPS builds Expedia Group's centralized, real‑time personalization engine across brands and channels, powering ranking, recommendations, retrieval, and other adaptive experiences that help travelers see more relevant, contextual, and useful experiences throughout their journey. Responsibilities 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. Minimum Qualifications 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. Preferred Qualifications Advanced degree in Machine Learning, Computer Science, Statistics, Mathematics, Engineering, or a related quantitative field. Experience delivering machine learning solutions at scale, including architecture considerations, production monitoring, model lifecycle management, and operational excellence in live environments. Demonstrated ability to influence technical direction within a domain through rigorous experimentation, strong scientific reasoning, pragmatic solution design, and clear communication with cross‑functional partners. Strong experience with recommendation, ranking, retrieval, search, personalization, ads, marketplace, e‑commerce, or similarly complex applied ML systems. Experience with neural recommendation systems, sequential or session‑based recommendation, transformer‑based recommenders, semantic retrieval, generative retrieval, or representation learning at scale. Experience with foundation models, LLMs, embedding models, semantic IDs, hybrid LLM‑recommender systems, two‑stage retrieval and ranking systems, or retrieval‑augmented personalization workflows. Relevant academic publications, patents, open‑source contributions, technical blog posts, industry talks, or other contributions to the ML/recommender‑systems community. Pay range (San Jose): $187,000.00 – $261,500.00 (potential up to $299,000.00). Pay range (Seattle): $173,000.00 – $242,500.00 (potential up to $277,000.00). 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, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law. This employer participates in E‑Verify.
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San Jose, Arizona, United States

Sprachkenntnisse

English

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