Frontier RL Evaluation Engineer

Key Talent Solutions; San Francisco (CA); On-site; USD 180,000 - 350,000; Full time

Job summary

Key Talent Solutions partners with AI ventures building research, evaluation, and data infrastructure for frontier-model teams. We seek research-minded engineers who have shipped RL environments, eval harnesses, reward and post-training pipelines, reliable enough to gate real releases.

This role focuses on RL environments, evaluation infrastructure, and production-grade data systems that shape training through evaluation and signals.

Qualifications

• Must have shipped RL-related work including environments, evaluation harnesses, reward systems or post-training pipelines.
• Experience turning research into production-grade systems for model evaluation and training.
• Strong publication or production-ready code in related frontier-model work is highly valued.

Responsibilities

• Own RL environments and evaluation infrastructure against real targets.
• Develop post-training reward-signal and data pipelines feeding model improvement.
• Build systems that translate production signals into evaluation specifications for training.

Skills

RL environments

Model evaluation

Data pipelines

Research-to-production

Job description

Key Talent Solutions partners with AI ventures building research, evaluation, and data infrastructure for frontier-model teams. We seek research-minded engineers who have shipped RL environments, eval harnesses, reward and post-training pipelines, reliable enough to gate real releases.

This role focuses on RL environments, evaluation infrastructure, and production-grade data systems that shape training through evaluation and signals.