Staff AI Researcher — Frontier ML & Evaluation

Red Cell Partners, LLC.; Oregon; Hybrid; USD 250,000 - 400,000; Full time

Benefits offered by this job

Career track opportunities

Health care for you and family

Maternity/paternity leave

Unlimited PTO

Professional development

401K and equity incentives

Mental health benefits

Open-source contributions

Job summary

Red Cell Partners is launching a stealth startup focused on AI for mission-critical workflows across healthcare, government, and regulated industries. We seek a Member of Technical Staff, AI Researcher who will design evaluation frameworks, reinforcement learning environments, and feedback systems to advance frontier AI.

You will work at the intersection of scientific inquiry and technical execution, turning data, evaluations, and feedback into measurable improvements while building robust

Qualifications

• 5+ years of experience in ML/AI or related field.
• Operate at intersection of AI research and software engineering.
• Strong Python skills and experience building scalable software.
• Hands-on experience with AI agents, model evaluations, RL, or related systems.
• Understanding of frontier AI methods, benchmarks, and data design.

Responsibilities

• Design and build evaluation frameworks and benchmarks for frontier models and RL environments.
• Develop reward models, graders, verifiers, and other feedback systems.
• Design supervised fine-tuning and RL experiments to measure data impact on model capability and alignment.
• Define what makes evaluations representative of real-world environments.
• Build systems for high-quality human data, including task design and data attribution.
• Translate research questions into lightweight experiments that yield actionable findings.
• Prototype quickly, diagnose failures, and transform results into scalable benchmarks or systems.
• Advance methods into production-quality implementations.

Skills

Python programming

AI research

Reinforcement learning

Model evaluation

Reward models

Technical communication

US citizenship

Education

Advanced degree preferred

Tools

Python

Job description

Red Cell Partners is launching a stealth startup focused on AI for mission-critical workflows across healthcare, government, and regulated industries. We seek a Member of Technical Staff, AI Researcher who will design evaluation frameworks, reinforcement learning environments, and feedback systems to advance frontier AI.

You will work at the intersection of scientific inquiry and technical execution, turning data, evaluations, and feedback into measurable improvements while building robust