Staff Software Engineer, Environments Infrastructure

Highlights

• Build infrastructure that improves Claude's capabilities via reinforcement learning.
• Own platform layers beneath every environment, including the agent runtime.
• Embed with research teams to productionize RL environments and transfer ownership.

What they offer

• Competitive compensation and benefits
• Optional equity donation matching
• Generous vacation and parental leave
• Flexible working hours

Ideal candidate

A systems-minded engineer who loves clean abstractions and preventing silent failures. You thrive embedding with researchers, turning messy code into maintainable frameworks others adopt and own.

Requirements

• Deep expertise in Python including static typing, async/concurrency and performant code
• Proven API and framework design taste with adoption by other engineers/teams
• Experience designing or operating stateful concurrent or distributed systems
• Habit of verification with measurement, checks and testing for correctness
• Experience working in large, evolving or research-style codebases
• Strong communication and ability to scope ambiguous problems independently
• Bachelor's degree or equivalent combination of education, training and experience