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LLM Researcher at well-funded seed-stage robotics AI startup

Are you a hands-on researcher with deep experience in post-training LLMs? A well-funded seed-stage robotics startup in San Francisco is looking for early-career, hungry talent to build the foundation model layer for humanoid autonomy. Instead of brittle, hand-coded scripts, you'll help train general-purpose policies from video data that can fold laundry or assemble furniture with zero-shot generalization. With backing from top-tier AI pioneers and significant equity on the table, this is a rare chance to shape the future of physical AI. If you ship code as fast as you run experiments, this high-impact role is for you.

About this role

Role overview

You will lead the development of foundation models for robotics, moving beyond hand-engineered controllers to create general-purpose autonomous policies. By applying advanced post-training techniques to video diffusion models, you will help build systems that generalize across tasks and environments. This role is ideal for hands-on researchers who ship production-grade code.

About the company

About the company

Well-funded seed-stage robotics AI startup

What you'll do

What you will do

  • Execute end-to-end post-training workflows including SFT, RLHF, and DPO to align robot policy behaviors.
  • Develop and optimize scalable training pipelines for large-scale video diffusion and foundation models.
  • Rapidly iterate on model architectures and training infrastructure to improve zero-shot generalization in new environments.

Who you are

Who this is a fit for

  • Extensive hands-on experience in post-training LLMs, specifically focused on alignment, reasoning, or multi-modal learning.
  • Prolific coding ability with a track record of shipping research code, open-source contributions, or production ML systems.
  • Hungry, early-career researcher excited by the prospect of working in-person in San Francisco within a fast-moving, high-stakes startup.

Why this role

Why this role is remarkable

  • Work at the cutting edge of physical AI by applying LLM-style scaling and generalization to humanoid robot autonomy.
  • Backed by world-class AI researchers and top-tier venture capital firms at the earliest, highest-impact stage of growth.
  • High-intensity, high-ownership environment where your research directly dictates the capabilities of next-generation robotic hardware.

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