Staff Software Engineer (Environments Infrastructure)

Location: Hybrid (San Francisco, CA or New York City, NY). Must be in office at least 25% of the time.

Salary: $405,000 - $605,000 USD

Company

Anthropic is a public benefit corporation focused on creating reliable, interpretable, and steerable AI systems.

What you will do

• Design widely used APIs and frameworks that researchers use to build RL environments.
• Own platform layers and agent runtimes that support all environments.
• Build tooling for environment owners to debug and maintain systems in production.
• Collaborate with research teams to identify abstractions and improve research codebases.
• Prevent silent failures through type safety, invariants, and targeted testing.
• Mentor researchers and engineers on engineering standards and design patterns.

Requirements

• Deep expertise in Python, including static typing, async, concurrency, and performance.
• Proven track record in API and framework design adopted by other engineers.
• Experience designing stateful concurrent or distributed systems.
• Ability to work productively in large, evolving research-style codebases.
• Strong written and verbal communication skills.
• Must be based in or able to work from San Francisco or New York City (Hybrid).

Nice to have

• Experience with ML research, RL workflows, or LLM training pipelines.
• Experience building agent frameworks or orchestration engines.
• Familiarity with sandboxed or containerized remote execution platforms.
• Experience with large-scale data processing and data lineage systems.

Culture & Benefits

• Collaborative "big science" environment focusing on high-impact research.
• Competitive compensation with optional equity donation matching.
• Generous vacation and parental leave.
• Flexible working hours and modern office spaces for collaboration.
• Visa sponsorship available for qualified candidates.