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Senior Research Engineer

Senior Research Engineer

LumicitySan Francisco, CA, United States
17 hours ago
Job type
  • Full-time
Job description

This range is provided by Lumicity. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

$220,000.00 / yr - $260,000.00 / yr

AI Recruitment Consultant @ Lumicity | Recruiting Researchers & Engineers with Foundational AI Experience

Researcher – LLM Post-Training & RL

Join a small, fast-moving team building the next generation of post-training data and RL environments for foundation model labs and applied AI companies.

You’ll design scalable RL recipes, build modular reward / evaluation frameworks, and drive research at the intersection of infra and modern RL. Your work will directly shape open-source environments, novel training data, and production systems used by leading AI labs.

What you’ll do

  • Develop RL recipes and scalable training environments
  • Design reward functions and evaluation pipelines
  • Build data curation / generation systems for post-training
  • Publish and share research with the wider community

What we’re looking for

  • MSc / PhD in CS or related field
  • Strong PyTorch + RL background (GRPO, reward engineering, evaluations)
  • Track record of research (ICLR, NeurIPS, ICML, or similar)
  • Work on cutting-edge, unpublished research problems
  • High autonomy and wide experimental design space
  • Direct impact on how top labs train and validate models
  • Early team role with strong ownership and upside
  • Seniority level

  • Mid-Senior level
  • Employment type

  • Full-time
  • Job function

  • Engineering and Research
  • Industries

  • Software Development and Research Services
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    Research Engineer • San Francisco, CA, United States

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