Principal Machine Learning Engineer

Principal Machine Learning Engineer on Zillow's Agentic AI team responsible for building large-scale multimodal agentic experiences and bridging research with scalable engineering.

Responsibilities

• Design and implement fault-tolerant, multimodal agentic experiences that serve millions of customers.
• Develop multiple interaction modalities, including Voice AI and Deep Research based interfaces.
• Establish robust evaluation frameworks, tracing capabilities, and safety guardrails to keep AI agents trustworthy and responsible.
• Stay at the cutting edge of emerging agentic paradigms and translate them into tangible product innovations.
• Lead complex, cross-team initiatives bridging applied research and scalable engineering.
• Condense complex research findings and AI system architectures into actionable insights for executives and cross-functional partners.

Requirements

• A master's degree or higher, or equivalent experience in Computer Science, Electrical Engineering, or related field, with emphasis on building products using frontier multimodal LLMs.
• 5+ years of experience 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 agentic AI frameworks, such as LangGraph, Agents SDK, AutoGen, and production ML infrastructure.
• A track record of writing articles, patents, and publishing high-impact research is a strong plus.
• Strong communication skills, with the ability to influence technical direction across teams and present to executive leadership.

Technologies

• LangGraph
• Agents SDK
• AutoGen

Benefits

• Equity awards

About the Team

• The Agentic AI team at Zillow is at the forefront of transforming the real estate industry by helping millions of people use AI assistants to find their next home.
• We aim to redefine the home shopping and transaction experience by providing an always-on assistant that integrates personalized user insights with Zillow's knowledge.
• This lean, customer-focused team of engineers independently ships features and has the autonomy to move fast and make decisions.

Get to Know Us

At Zillow, we are reimagining how people move through the real estate market and through their careers. As the most-visited real estate platform in the United States, we help customers navigate buying, selling, financing and renting with greater ease and confidence.

Zillow is honored to be recognized among the best workplaces in the country. We were named one of Fortune 100 Best Companies to Work For in 2025 and included on the People Companies That Care list for 2025, reflecting our commitment to an innovative, inclusive, and engaging culture where employees are empowered to grow.

No matter where you sit in the organization, your work will help drive innovation, support our customers, and move the industry—and your career—forward, together.

Zillow Group is an equal opportunity employer committed to fostering an inclusive, innovative environment with the best employees. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. If you have a disability or special need that requires accommodation, please contact your recruiter directly.

Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable state and local law.