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Research Scientist: Post-Training

United States, San Mateo 200000.00 - 350000.00 USD / Year · Job Posted February 18, 2026
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Job Description

Pretraining gives us a general model. Post-training makes it useful, controllable, safe, and performant in the real world. You will train large pretrained robot models into production-ready systems via fine-tuning, reinforcement learning, steering, human feedback, task specialization, evaluation, and on-robot validation—at scale. Regardless of your initial background, you will grow into becoming a full-stack ML roboticist capable of quickly pinpoint issues on either side of ML or controls, and all the places in between. This is where research meets reality.

Job Responsibility

  • Designing fine-tuning and adaptation strategies for downstream robotic tasks and embodiments
  • Developing methods for improving reliability, robustness, and controllability
  • Building evaluation frameworks that measure real-world robot performance, not just offline metrics
  • Improving inference-time performance (latency, stability, memory footprint) in collaboration with ML infrastructure
  • Leveraging techniques such as imitation learning, RL, distillation, synthetic data, and curriculum learning
  • Closing the loop between model outputs and physical-world outcomes

Requirements

  • Experience with fine-tuning large models for downstream tasks (RLHF, IL, RL, distillation, domain adaptation, etc.)
  • Worked on embodied AI, robotics, or real-world ML systems
  • Care deeply about evaluation, benchmarking, and failure analysis
  • Comfortable debugging across the ML stack — from loss curves to robot behavior
  • Enjoy rapid iteration with real-world feedback loops
  • Want to bridge the gap between foundation models and physical deployment

What we offer

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