Platform Engineer, RL & Eval Data

About the team:

• The Human Data Division builds training and evaluation data for frontier AI labs.
• We are a small team that moves fast and holds a high quality bar.

The role:

• We are looking for a platform engineer to join the platform team as a core member.
• You will work across all of our systems and help turn what the team needs into working software.

Responsibilities:

• Maintain and improve the platforms by fixing bugs, paying down technical debt, and improving test coverage.
• Build new features across the stack, from database and backend to APIs and internal tools.
• Build RL environments and their infrastructure, including sandboxes and rollout collection.

Skills we are looking for:

• Strong backend engineering in Python with clean, tested, maintainable code.
• Experience with large-scale system design, containers, and orchestration.
• Hands-on experience building RL environments for LLM agents and evaluation harnesses.