Senior Machine Learning Scientist - Agentic Experience

Expedia Expedia · Hospitality · CA

Expedia Group is seeking a Senior Machine Learning Scientist to design, build, and evaluate multi-step agentic AI systems. This role involves researching and implementing state-of-the-art agentic architectures, developing agent orchestration frameworks, integrating LLMs with external tools, and defining evaluation frameworks for agentic systems. The position requires strong Python and ML framework proficiency, experience with LLM APIs and orchestration libraries, and a solid understanding of prompt engineering techniques. The goal is to revolutionize traveler experiences through autonomous, intelligent agent systems.

What you'd actually do

  1. Design, build, and evaluate multi-step agentic AI systems, including autonomous agents capable of planning, tool use, memory management, and multi-agent collaboration
  2. Research and implement state-of-the-art techniques in agentic architectures, such as ReAct, reflection loops, chain-of-thought prompting, and tool-augmented reasoning
  3. Develop and maintain agent orchestration frameworks, defining how agents decompose tasks, delegate to sub-agents, and handle failure and recovery
  4. Integrate large language models (LLMs) with external tools, APIs, databases, and code execution environments to enable real-world task completion
  5. Define and own evaluation frameworks for agentic systems, measuring task success, reliability, latency, cost, and safety across diverse benchmarks and production scenarios

Skills

Required

  • Python
  • ML frameworks (PyTorch, TensorFlow, or JAX)
  • LLM APIs
  • orchestration libraries (e.g., LangChain, LlamaIndex, or similar)
  • integrating LLMs with external tools, APIs, and structured data sources
  • prompt engineering techniques (chain-of-thought, few-shot prompting, structured output generation)
  • defining and running evaluation frameworks for ML systems

Nice to have

  • PhD, MS, or BS in Computer Science, Machine Learning, Statistics, Engineering, or a related field
  • travel or e-commerce industry experience
  • Publications in top-tier ML conferences or journals
  • Patented Inventions, pending and issued
  • Contributions to open-source ML projects
  • Experience taking models from prototype to production

What the JD emphasized

  • multi-step agentic AI systems
  • agent orchestration frameworks
  • evaluation frameworks for agentic systems
  • agentic systems

Other signals

  • agentic systems
  • LLM integration
  • evaluation frameworks