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About
About The Role Anthropic is looking for backend software engineers to work across our product engineering organization. You'll build the products and systems that bring Claude's capabilities to users and developers—from the APIs that hundreds of thousands of developers build on to the enterprise features that let Fortune 500 companies deploy Claude at scale, to the agentic tools that are redefining how developers write code.
This is a high‑impact role where you'll work at the intersection of complex distributed systems and user‑facing product development. You'll partner closely with frontend engineers, researchers, designers, and product managers to translate product vision into robust, scalable backend systems.
API Core Build and scale the foundation of the Claude API—the systems that deliver Claude's intelligence to every developer, from startups to enterprise. Own the performance, reliability, and efficiency of the core serving path, ensuring users get the most speed and value from our models. Partner closely with inference and safeguards to optimize the full stack.
API Capabilities Bring frontier model capabilities to developers through the Claude API, owning core features like vision, tool use, and computer use. Launch new models and ship the primitives that make Claude more capable with every release. Partner directly with research and inference to productionize what's next.
API Distributability Transform the Claude API into a cloud‑native, managed product that runs wherever customers need it—cross‑cloud and on Anthropic's own infrastructure—with enterprise‑grade security, compliance, and operational capabilities.
API Knowledge Focus on transforming Claude into a true knowledge worker by ensuring the model has access to and understanding of the right knowledge at the right time. Work on making it possible for developers to securely give Claude access to their data while automatically processing and retrieving relevant information. Partner directly with research to bring state‑of‑the‑art retrieval advancements to developers.
Developer Experience Build products and tools to enable developers to harness the full power of LLMs to create successful, reliable, and groundbreaking applications with ease. Build the tools to accelerate developers from idea to deployment and help them improve API usage by generating and evaluating prompts.
API Agents Build the infrastructure and APIs that enable developers to create powerful agentic applications within the Claude API. Help developers with agent orchestration through capabilities like tool use, multi‑step reasoning, and long‑running task execution. Partner with research to bring cutting‑edge agent capabilities to production.
Enterprise Foundations Join the team that makes Claude enterprise‑ready at scale. Build foundational systems that large organizations require before they can deploy AI at scale: user and permissions management, security and compliance features, and analytics infrastructure.
You Might Be a Good Fit If You
Have 5+ years of relevant industry experience as a backend or product engineer, ideally leading projects of multi‑month, complex scale
Are proficient in Python, Go, or similar backend languages and have experience with modern cloud infrastructure
Have strong demonstrated product sense – you think about the user experience even when writing server‑side code
Take full ownership of your work, from design through deployment and operations
Can navigate ambiguity and make sound technical decisions independently, and have ideally operated in 0 to 1 and more mature team or company settings
Communicate effectively across functions and can translate between product requirements and technical implementation
Care deeply about code quality, testing, and operational excellence, and about the societal impact of the systems you build
Strong Candidates May Also Have
Experience building or maintaining billing, payments, or financial infrastructure where data consistency and correctness are critical
Familiarity with containerization, sandboxed execution environments, or security‑focused infrastructure design
Experience with identity and access management systems (authentication, authorization, SSO, RBAC)
Exposure to ML/AI systems or an understanding of how LLM inference and model serving pipelines work
Experience building internal developer tools, CI/CD systems, or platform capabilities that improved engineering velocity across an organization
Experience with multi‑cloud or cloud‑agnostic infrastructure patterns
Experience with REST APIs and service‑oriented architectures at scale
Familiarity with modern frontend frameworks like React (our platform engineers sometimes work across the stack)
Annual Salary $300,000—$320,000 USD
Logistics Minimum education:
Bachelor’s degree or an equivalent combination of education, training, and/or experience
Required field of study:
A field relevant to the role as demonstrated through coursework, training, or professional experience
Minimum years of experience:
Years of experience required will correlate with the internal job level requirements for the position
Location‑based hybrid policy:
Currently, we expect all staff to be in one of our offices at least 25% of the time. However, some roles may require more time in our offices.
Visa sponsorship:
We do sponsor visas, but we cannot guarantee sponsorship for every role and every candidate. If we make you an offer, we will make every reasonable effort to obtain the appropriate visa.
Legal and Safety Statements Anthropic recruiters only contact you from @anthropic.com email addresses. Legitimate recruiters will never ask for money, fees, or banking information before your first day. If you are ever unsure, visit anthropic.com/careers directly for verified position openings.
Equal Opportunity Anthropic is a public benefit corporation committed to equal opportunity employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, pregnancy, disability, veteran status, or any other protected class.
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Languages
- English
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