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Seattle, Washington, United States
Remote only
As a Principal Applied Scientist, you will set the science direction for advanced reasoning and long-running agent systems within the Agentic AI organization. You will partner closely with applied scientists, machine learning engineers, software engineers, product leaders, and senior stakeholders to define the science roadmap for Zillow’s agentic experiences. This is a high-impact principal individual contributor role responsible for translating emerging advances in agentic AI into reliable, differentiated customer experiences.
You will get to
Define and drive the end-to-end applied science strategy for advanced reasoning and long-running agent systems, balancing innovation, customer value, reliability, safety, and business priorities.
Advance agent capabilities through agent architecture and harness design, context and memory engineering, test time scaling, post-training, evaluation and data flywheel.
Establish rigorous evaluation frameworks for agentic systems, including task- and trajectory-level evaluation, long-horizon benchmarks, controlled experiments, ablation studies, and online measurement.
Influence senior and executive stakeholders by clearly communicating scientific insights, technical trade-offs, risks, and recommendations that shape Zillow’s Agentic AI product and platform strategy.
Stay at the forefront of research in agentic AI and foundation models, selectively introducing advances that materially improve Zillow’s customer experiences.
Represent Zillow’s work through publications, conference presentations, open-source contributions, patents, and external technical engagement.
You have a PhD degree in Computer Science, Machine Learning, Statistics, Mathematics, or a related field, or equivalent experience demonstrating comparable depth of technical expertise, scientific leadership, and impact in production AI systems
8+ years of industry experience building and deploying large-scale, high-impact AI systems.
You have deep expertise in large language models and agentic AI, with experience turning research ideas into reliable customer-facing systems.
Experience developing AI agents with capabilities such as multi-step reasoning, long-running execution, and proactive behavior.
Extensive hands-on experience across agent architecture and harness design, context and memory engineering, test-time scaling, and post-training.
Extensive experience establishing rigorous evaluation frameworks for complex AI systems, including benchmark design, experimentation, measurement of reliability and end-to-end impact
You have a proven track record of leading complex, ambiguous, cross-functional initiatives from scientific framing and prototyping through production deployment, monitoring, and measurable customer or business impact.
Demonstrated technical leadership, mentorship, and ability to influence across science, engineering, product, and executive audiences.
You demonstrate science leadership through high-impact production systems, patents, publications, open-source contributions, conference presentations, or equivalent industry impact.
At Zillow, we’re reimagining how people move—through the real estate market and through their careers. As the most-visited real estate platform in the U.S., we help customers navigate buying, selling, financing and renting with greater ease and confidence. Whether you're working in tech, sales, operations, or design, you’ll be part of a company that's reshaping an industry and helping more people make home a reality.
Zillow is honored to be recognized among the best workplaces in the country. Zillow was named one of FORTUNE 100 Best Companies to Work For® in 2025, and included on the PEOPLE Companies That Care® 2025 list, reflecting our commitment to creating 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.
Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.