Senior Staff Software Engineer, API
About the role
The Senior Staff Software Engineer will define and drive multi-year technical strategy for the Claude API, set direction across API Core, Capabilities, Knowledge, Distributability, and Agents, and partner with Research, Inference, Platform, Infrastructure, and Safeguards to ensure the Claude API is reliable, capable, and positioned to grow with Anthropic's ambitions.
Responsibilities
- Define and drive multi-year technical strategy for the Claude API, setting direction across API Core, Capabilities, Knowledge, Distributability, and Agents.
- Identify and personally lead the highest-complexity, highest-impact engineering initiatives spanning multiple teams.
- Serve as the primary technical decision-maker for major architectural decisions with org-wide scope.
- Partner with Research to evaluate and integrate frontier capabilities; work with Inference and Platform for reliable delivery at scale; collaborate with Infrastructure and Safeguards for reliability, security, and responsible deployment.
- Mentor and develop Staff-level engineers across the org.
- Drive alignment across Product, GTM, Safety, and beyond while proactively identifying and addressing systemic technical risks.
Requirements
12+ years of engineering experience with a clear track record operating at Staff or Senior Staff level. Demonstrably shaped technical strategy for large-scale API or distributed systems platforms. Drive the highest-leverage technical outcomes without formal authority—you lead through influence, quality of thinking, and trust. Deep expertise in distributed systems and API architecture, and are effective writing design docs, making architectural calls, and coding in critical paths. Highly effective across org boundaries—you build trust with Research, Inference, Infrastructure, Safeguards, and business stakeholders alike. Strong product instincts and a craftsperson's approach to API design; communicate clearly with both technical and non-technical audiences.
Qualifications
- Languages: Python, Golang, Rust
- Infrastructure: GCP, AWS, Azure, Kubernetes
- Databases: PostgreSQL (AlloyDB), Vector Stores, Firestore, Spanner
- Tools: Feature Flagging, Prometheus, Grafana, Datadog, Claude Code
Benefits
Annual Compensation Range: $405,000—$485,000 USD
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