Staff Software Engineer, Environments Infra — Scale RL

Anthropic Limited; San Francisco (CA); Hybrid; USD 405,000 - 605,000; Full time

Job summary

Anthropic Limited in San Francisco seeks a Staff Software Engineer for Environments Infrastructure to design APIs/frameworks and own the environment platform layers for production RL runs.

You will embed with researchers, build tooling for debugging in production, and mentor teams. Strong Python, static typing, and experience with stateful distributed systems are essential; familiarity with AI tooling for verification is a plus.

Qualifications

• Deep expertise in Python and typing.
• Experience designing scalable APIs and frameworks.
• Strong systems thinking and debugging of complex distributed systems.

Responsibilities

• Design widely used APIs, frameworks, and abstractions that others build on.
• Own the platform layers beneath environments, including the agent runtime.
• Build tooling for understanding, debugging, and maintaining environments in production.
• Embed with research teams on a rotational basis and transfer ownership when rotating off.
• Anticipate silent failure modes and improve reliability through type safety and invariants.
• Drive adoption of new frameworks across the organization and define engineering standards.

Skills

Python

API design

Framework design

Distributed systems

Static typing

Education

Bachelor's degree

Tools

Workflow engine

Actor framework

Job description

Anthropic Limited in San Francisco seeks a Staff Software Engineer for Environments Infrastructure to design APIs/frameworks and own the environment platform layers for production RL runs.

You will embed with researchers, build tooling for debugging in production, and mentor teams. Strong Python, static typing, and experience with stateful distributed systems are essential; familiarity with AI tooling for verification is a plus.