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True Talent Solutions Partners

Research Scientist, Post-Training

San Francisco

Client Roles

ABOUT THE ROLE

Join a research team at an applied AI research and training data company, focused on understanding how datasets affect model behavior. You will design controlled post-training experiments and turn their results into evidence that informs data development and model improvement.

WHAT YOU'LL DO

  • Run controlled supervised fine-tuning and reinforcement learning experiments to measure how datasets affect model performance.
  • Build shared evaluation infrastructure and benchmarks that support reproducible findings across models, capabilities, and domains.
  • Help develop public evaluations and new data types that advance model capabilities.
  • Publish external-facing research, blog posts, and technical reports.
  • Use experimental results to guide improvements to data quality in collaboration with internal teams.
  • Work with partner research labs to communicate clear findings about data and model performance.

WHAT WE'RE LOOKING FOR

  • 0 to 4 years of experience building or delivering work in LLM training, post-training, or model evaluation, including experience at a frontier AI lab.
  • Familiarity with LLM training and evaluation methods, including SFT and RL-based post-training.
  • Experience independently designing, implementing, and analyzing controlled experiments, and drawing actionable insights from imperfect results.
  • Software engineering ability to build or modify experimental infrastructure, such as evaluation harnesses, training pipelines, or benchmarks.
  • Ability to work across domains such as finance, software engineering, and polic
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