Staff Software Engineer, Web Platform

Anthropic's mission is to create reliable, interpretable, and steerable AI systems. It is a public benefit corporation headquartered in San Francisco. Claude.ai is Anthropic's flagship consumer product, spanning web, mobile, desktop, and browser extensions.

The Web Platform team owns the foundational layer that makes Claude.ai possible: shared infrastructure, components, APIs, and tooling that let every other product team ship quickly and reliably. As a Software Engineer on this team, you'll design and ship shared components and design-system-level abstractions, evolve the backend-for-frontend (BFF) APIs that power client applications, and improve the build, deploy, and observability systems that keep Claude.ai running smoothly across surfaces.

• Improve developer velocity by reducing friction in build, deploy, and testing pipelines
• Work on performance and reliability: resolve latency issues, improve observability, and establish high standards
• Design and build shared UI components, libraries, and abstractions used across web and mobile
• Partner with product engineering teams to understand needs and shape platform investments
• Maintain and evolve documentation and tooling that make the platform approachable

• Strong practical skills in modern web technologies (React, TypeScript or comparable frameworks) and experience designing or consuming APIs that serve frontend applications
• Care about developer experience and have a track record of building things that make other engineers more productive
• Solid instincts around reliability, observability, and performance in production systems
• Thrive in fast-paced, collaborative environments

• 5+ years of software engineering experience, with significant time building shared platforms, developer tools, or infrastructure
• Building shared component libraries, design systems or reusable UI infrastructure
• API design and client-server architecture patterns
• Performance optimization and latency reduction in production web applications
• CI/CD, build systems, and/or deployment automation
• Observability and monitoring (e.g. metrics, logging, tracing)

Annual salary: $320,000—$405,000 USD.

Minimum education: Bachelor's degree or equivalent combination of education, training, and/or experience. Location-based hybrid policy: all staff are expected to be in one of Anthropic's offices at least 25% of the time. Visa sponsorship is offered where possible.

Apply via the Greenhouse job posting. Anthropic recruiters only contact candidates from @anthropic.com email addresses.