Staff+ Software Engineer, Claude App Infrastructure

Anthropic•Seattle, WA

9d•$320,000 - $485,000•Hybrid

About The Position

Claude App Infrastructure owns the reliability, experience, and agentic capabilities of claude.ai. We are the platform team for Anthropic's flagship consumer product — responsible for the serving architecture that keeps Claude available at scale, the conversation experience, and the infrastructure that lets every product team at Anthropic ship into claude.ai safely and fast. When the product grows at hyper scale, we are the team that makes sure it feels the same — or better. Beyond the foundation, we are building the agentic layer that turns claude.ai from a chat surface into an execution surface: task execution, personalization, browser use, server-side tools. This is where the next generation of the product gets built — the primitives that let Claude act in the world, not just respond. We believe reliability and velocity are the same problem, and our job is to build the systems that make both inevitable.

Requirements

10+ years of experience building distributed systems, infrastructure, or platform services at the hyper scale
Comfortable building Cloud Native infrastructure on GCP, AWS, or Azure
Care deeply about security, isolation, and building systems that fail safely
Experience with containers, sandboxing, or secure execution environments (e.g., gVisor, Firecracker, V8 isolates)
Are comfortable with ambiguity—this is greenfield work, and you'll help define the architecture
Write clean, maintainable code in Python, Go, Rust, or similar
Want to work on problems that don't have existing playbooks

Nice To Haves

Experience building multi-tenant execution platforms or serverless infrastructure
Background in security engineering, sandboxing, or isolation technologies
Familiarity with workflow orchestration systems (Temporal, Airflow, Step Functions)
Experience with state machines, checkpointing, or durable execution patterns
Low-level systems experience (Linux internals, eBPF, container runtimes)

Responsibilities

Design and build sandboxed compute environments where Claude can safely execute code, access tools, and interact with external services
Build state management systems for long-running agent tasks—handling checkpoints, recovery, and resumption across failures
Develop authentication and authorization frameworks for delegated access—enabling Claude to act on behalf of users securely
Create observability and debugging tools for agent execution—understanding what Claude did, why, and how to make it better
Partner closely with product and research teams to define what's possible and ship it