Staff+ Software Engineer, Backend
Core
Build and scale backend systems powering the Claude API, including core serving, capabilities, knowledge retrieval, developer tools, agent infrastructure, enterprise foundations, identity verification, and marketplace platforms.
Role type
Staff+ Software Engineer, Backend
Builds
The Claude API infrastructure, including core serving paths, vision/tool-use capabilities, knowledge retrieval systems, developer tools, agent orchestration, enterprise security/compliance, identity verification (KYC/KYB), and marketplace transaction flows.
Domain
Artificial Intelligence / Large Language Models (LLMs) / Cloud Infrastructure
Deliverable
production ML models
Required skills
Backend systems design, API design, distributed systems, cloud infrastructure, product-minded engineering, architectural decision-making, cross-team alignment, mentorship, ambiguity navigation.
Preferred skills
Experience with LLMs, inference optimization, agent orchestration, enterprise security/compliance, identity verification systems.
Technologies
Cloud infrastructure, APIs, distributed systems, LLMs, inference systems.
Responsibilities
Own complex multi-month backend projects; drive alignment between product, engineering, and research; make architectural decisions for reliability and scalability; build and scale core API systems; design processes for team effectiveness; partner with research to productionize model capabilities.
Seniority
Staff+, hands-on IC with strategic scope
