Software Engineer, Platform

Position: Staff Software Engineer, Platform
Location: New York

About Anthropic

Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems.

About The Role:

We are looking for backend / platform software engineers to join our Product Foundations org. We build foundational primitives that help accelerate product development across Anthropic. Some examples of what we own and maintain are our core sampling pipeline, our rate limiting platform, and our RAG platform.

We have multiple teams that are currently hiring. Team placement occurs after the interview process, taking into account your interests and experience alongside organizational needs. This flexible approach allows us to match talented engineers with the platform efforts where they’ll have the greatest impact and growth potential:

Product Dev Product:

We work on maximizing the developer productivity of product engineers ’ll architect and optimize the critical development infrastructure that powers our AI product development, including dev environments, developer tooling, and CI/CD pipelines. You’ll partner closely with product teams to understand their development workflow and eliminate friction points. Your work will have an extraordinary multiplier effect, enhancing productivity across our entire product organization and accelerating our mission.

Product Platform:

We provide a set of stable, powerful, and easy to use shared product capabilities leveraged by the Claude.ai, API and other internal product and research teams. You’ll work on our core platform components like rate limiting, LLM sampling and multimodal processing. Our mandate includes developing reusable components, improving system performance, and creating scalable abstractions that accelerate product development across the organization while maintaining high standards for reliability and security.

Accounts Platform:

We build and maintain the critical infrastructure that powers identity and authentication across Anthropic’s product suite. We work closely with product teams, security, support, and trust & safety as customers. We create scalable solutions for user authentication, authorization, role-based access control, and single sign‑on that form the backbone of our company’s identity management operations. We maintain a user‑centric approach, building reliable systems that our users and company can depend on as we tackle complex challenges at the intersection of security, scalability, and user experience.

Billing Platform:

We build and maintain the core billing platform that powers all of Anthropic’s products. You will lead the design and implementation of our billing infrastructure, working at the intersection of our core product, financial systems, and customer‑facing features. This role is crucial for scaling our revenue operations, ensuring a seamless customer experience and enables the launch of new and innovative products with complex billing requirements.

Responsibilities:

• Build and scale platform components to handle Anthropic’s rapid growth

• Design and architect platform components that are composable and deliver value for a variety of use cases

• Collaborate closely with product teams to understand their needs and build platform capabilities that accelerate their feature delivery

• Make build vs buy decisions, evaluating and implementing 3rd party solutions when most impactful

• Set technical direction and vision for various product and platform features

• Partner with research to quickly prototype and launch new capabilities based on research breakthroughs

You Might Be A Good Fit If You:

• Have 6+ years of practical experience as a backend or platform engineer building scalable distributed systems

• Have strong coding skills and experience with service‑oriented architectures

• Have worked in early start‑up or otherwise fast moving, rapidly evolving environments, and have ideally built products from 0 to 1

• Take full ownership of your work, navigate ambiguity effectively, and…