ZillowHiring

Principal Applied Scientist, Generative AI

  • USD 195,600 to 312,400 per year
  • Remote, United States
  • Lead
  • Posted 2 weeks ago
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In one line

Principal scientist leading a small applied science group that builds the LLMs behind an AI shopping assistant; remote in the US.

About the role

A flat team of 15 to 20 scientists inside a wider agentic AI group, owning their own research areas. Work turns advances in LLMs and reinforcement learning into production systems serving hundreds of millions of requests a day.

At a glance

Pay
USD 195,600 to 312,400 per year
Remote scope
Remote, United States
Seniority
Lead
Skills
Python, PyTorch, LLMs, Reinforcement learning, Post-training, Reward modeling, LLM evaluation
Posted
20 Oct 2026
Last checked
3 Nov 2026

What you will do

  • Set the research agenda for LLM post-training, reward modelling and evaluation
  • Lead and grow applied scientists, giving technical direction and mentorship
  • Take ambiguous problems from product vision through experiments, models and data
  • Turn generative AI research into improvements in a product used by millions
  • Present scientific strategy and results to executives and partner teams

What they look for

  • Hands-on work with LLMs or foundation models, including post-training, reward modelling or evaluation
  • Experience leading scientists or engineers while staying technical, or a research group with publications
  • Python and ML frameworks such as PyTorch, able to read, debug and guide experimental code

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Muse is available in the US only for now.

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Questions about this job

Is this a remote job, and where can I work from?

Yes. The posting lists Principal Applied Scientist, Generative AI as a remote role for candidates in the United States.

What does this job pay?

The posting states USD 195,600 to 312,400 per year.

What experience is needed?

It is a lead role. The posting asks for: hands-on work with LLMs or foundation models, including post-training, reward modelling or evaluation; experience leading scientists or engineers while staying technical, or a research group with publications; python and ML frameworks such as PyTorch, able to read, debug and guide experimental code. Skills it names include Python, PyTorch, LLMs, Reinforcement learning.

How do I apply with Keywordise AI?

Press the Apply with Keywordise AI button and add your CV. Keywordise tailors your CV and cover letter to this posting and sends the application for you, with a free 7-day trial and no card.

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