Drimva

Scale AI

Machine Learning Research Scientist, Post-Training

$166K–$207K

San Francisco, CA +3 · Full-time · Posted Feb 11, 2025

Location
San Francisco, CA
Seattle, WA
New York, NY
San Francisco, California, United States
Education
Ph.D. or Master's degree in Computer Science, Machine Learning, AI, or a related field.

About the job

Research and develop post-training methods and data strategies to improve the alignment, capabilities, and robustness of text and multimodal large language models.

What you'll do

  • Develop post-training techniques such as SFT, RLHF, and reward modeling, and experiment with preference optimization.
  • Analyze model behavior, identify weaknesses, and propose ways to mitigate bias and improve robustness.
  • Publish research findings and collaborate with researchers, engineers, and foundation model labs on model development.

What they ask for

  • Deep understanding of deep learning, reinforcement learning, and large-scale model fine-tuning.
  • Experience with post-training techniques such as RLHF, preference modeling, or instruction tuning.
  • Excellent written and verbal communication skills.

Nice to have

  • Published machine learning research at major conferences and/or journals.
  • Previous experience in a customer-facing role.

Pay

$165,600 — $207,000 USD (base salary)

Tools

SFT, RLHF

AI focus

Develop post-training, preference optimization, data curation, and evaluation methods to improve LLM alignment, generalization, capabilities, and robustness across text and multimodal modalities.

Model-written summary · the original posting is authoritative

First seen Oct 10, 2026 · Last verified Nov 5, 2026 (UTC)