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Machine Learning Scientist III

Expedia Group

$137,500 - $220,000
Dec 6, 2025
Seattle, WA, US
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Transform the experience of millions of travelers all over the world by developing and implementing cutting-edge AI and machine learning solutions

Requirements

  • Advanced degree (PhD preferred) in Computer Science, Statistics, Operations Research, Econometrics, Economics, or a related quantitative field
  • 4+ years of professional experience in machine learning and AI
  • Strong hands-on experience in causal modeling and experimental design
  • Proven ability to analyze large, complex datasets and generate actionable insights
  • Experience with end-to-end ML solution development
  • Pragmatic problem-solving skills focused on scalable and effective methods
  • Proficiency in Python; familiarity with Spark is a plus but not required - eagerness to learn is valued

Responsibilities

  • Lead the end-to-end research, design, and implementation of scalable machine learning and AI solutions with engineering rigor
  • Architect integrated technical solutions that leverage AI technologies, including model selection based on performance, latency, and cost considerations
  • Evaluate and compare AI models (e.g., AWS, OpenAI) to determine best fit, and guide data preparation strategies to ensure quality and relevance
  • Define success metrics, establish baselines, and plan experiments to measure outcomes and drive continuous improvement
  • Apply expertise in prompt engineering to optimize model performance and troubleshoot prompt vs. model-related issues
  • Design and evaluate single or multi-agent AI configurations for production readiness, including security and guardrail implementation
  • Provide technical leadership and mentorship to ML scientists and developers, fostering collaboration across teams and promoting a strong data science culture

Other

  • Excellent communication skills, with the ability to share ideas effectively with diverse technical and business audiences
  • Ability to work with a creative engineering team building an intelligent, scalable, and personalized travel assistance platform
  • Advanced degree (PhD preferred) in Computer Science, Statistics, Operations Research, Econometrics, Economics, or a related quantitative field
  • 4+ years of professional experience in machine learning and AI
  • Ability to provide technical leadership and mentorship to ML scientists and developers