Principal Machine Learning Engineer, Agentic AI

Zillow is transforming the real estate industry through the Agentic AI team, which focuses on using AI assistants to enhance the home shopping experience. As a Principal Machine Learning Engineer, you will lead the development of multimodal AI experiences and ensure the reliability and innovation of AI agents.

Responsibilities:

• Develop large-scale, fault-tolerant multimodal agentic experiences that reach millions of customers
• Design and develop multiple agent interaction modes, including Voice AI and Deep Research
• Pioneer robust evaluation frameworks, tracing systems, and safety guardrails to ensure our highly-visible AI agents remain trustworthy and responsible
• Remain on the cutting edge of emerging agentic paradigms and convert them into tangible product innovation
• Lead complex, multi-team initiatives, bridging the gap between applied research and highly scalable engineering
• Distill complex research findings and AI system architectures into actionable insights for a diverse audience, including executives and cross-functional partner teams

Requirements:

• A master's degree or above, or equivalent experience in Computer Science, Electrical Engineering, or a related field, with emphasis on building products using frontier multimodal LLMs
• 5+ years of experience with a proven track record of deploying large-scale ML models, with the most recent 2-3 years building agent-based systems, multi-agent collaboration, or similar paradigms
• Experience developing engaging dialogue systems capable of long conversations, context-aware tool selection, and compliant response generation
• Experience building AI services capable of handling hundreds of millions of daily interactions with high availability, low latency, and robust fault tolerance
• Familiarity with various agentic AI frameworks, such as LangGraph, Agents SDK, AutoGen, and production ML infrastructure
• Strong communication skills, with the ability to influence technical direction across teams and present to executive leadership
• A track record of writing articles, patents, and publishing high-impact research is a strong plus