Principal Machine Learning Scientist – Agentic Experiences

Expedia Group

Principal Machine Learning Scientist developing agentic AI systems for Expedia Group’s travel platform. Designing LLM orchestration, evaluation, safety, and production solutions impacting millions of travelers.

Posted 8/5/2026full-timeSeattle • California, Washington • 🇺🇸 United StatesLead💰 $242,000 - $387,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and deploying agentic AI systems, integrating large language models with external tools, and defining evaluation frameworks for performance metrics. Proven ability to mentor teams and translate complex business requirements into effective AI solutions.

Highest-signal resume keywords

Agentic AI System DesignPython ProficiencyLLM API IntegrationML System Evaluation FrameworksMentoring ML Engineers

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Machine LearningAgentic Architecture TechniquesPrompt EngineeringTask DecompositionFailure HandlingTool-Augmented ReasoningMulti-Agent CollaborationProduction MonitoringBenchmarkingData Structures

Soft Skills

CollaborationMentoringResearch SynthesisProblem SolvingCommunication

Tools & Technologies

PyTorchTensorFlowJAXLangChainLlamaIndexAPIsDatabasesCode Execution Environments

Industry Keywords

E-CommerceTravelMachine Learning EngineeringOpen-Source ContributionsPublications in ML Conferences

Tech Stack

Tools & technologies

PythonPyTorchReactTensorflow

About the role

Key responsibilities & impact

Design, build, and evaluate multi-step agentic AI systems with planning, tool use, memory management, and multi-agent collaboration
Research and implement agentic architecture techniques including ReAct, reflection loops, chain-of-thought prompting, and tool-augmented reasoning
Develop and maintain agent orchestration frameworks for task decomposition, delegation, failure handling, and recovery
Integrate large language models with external tools, APIs, databases, and code execution environments
Define and own evaluation frameworks measuring task success, reliability, latency, cost, and safety
Collaborate with product, engineering, and research teams to translate business requirements into production-grade agentic solutions
Identify and mitigate agentic-system risks such as prompt injection, unintended actions, hallucinations, and unsafe tool use
Synthesize academic research and industry developments to inform technical direction
Mentor senior ML engineers and scientists on agentic design patterns, LLM practices, and experimentation methodology

Requirements

What you’ll need

BS in Computer Science, Machine Learning, Statistics, Engineering, or a related field, or equivalent professional experience
10+ years of related industry experience
Experience designing and deploying agentic or multi-step AI systems in production or research settings
Strong proficiency in Python and ML frameworks such as PyTorch, TensorFlow, or JAX
Experience with LLM APIs and orchestration libraries such as LangChain or LlamaIndex
Experience integrating LLMs with external tools, APIs, and structured data sources
Understanding of prompt engineering, including chain-of-thought, few-shot prompting, and structured output generation
Experience defining and running ML-system evaluation frameworks, including offline benchmarking and production monitoring
Experience taking models from prototype to production with Machine Learning Engineering teams
Advanced degree in Computer Science, Machine Learning, Statistics, or Engineering is preferred
Experience in travel or e-commerce is preferred
Publications in top-tier ML conferences or journals are preferred
Patented inventions are preferred
Contributions to open-source ML projects are preferred

Benefits

Comp & perks

Medical, dental, and vision coverage
Paid time off
Employee Assistance Program
Wellness reimbursement
Travel reimbursement
Travel discounts
International Airlines Travel Agent Network (IATAN) membership
Flexible benefits and support
Accommodation or adjustment support during the application or recruiting process