Staff Software Engineer, Web Platform

Have strong practical skills in modern web technologies (React, TypeScript or comparable frameworks) and experience designing or consuming APIs that serve frontend applications

Have 5+ years of software engineering experience, with significant time spent building shared platforms, developer tools, or infrastructure that other engineers rely on

Building shared component libraries, design systems or reusable UI infrastructure

API design and and client-server architecture patterns that balance flexibility with consistency across client platforms

Performance optimization and latency reduction in production web applications

CI/CD, build systems, and/or deployment automation

is Anthropic's flagship consumer product, spanning web, mobile, desktop, and browser extensions—and it's growing fast.

The Web Platform team owns the foundational layer that makes all of this possible: the shared infrastructure, components, APIs, and tooling that let every other product team at Anthropic ship quickly, reliably, and with confidence.

As a Software Engineer on this team, you'll be hands-on building the platform that other engineers depend on every day.

This means designing and shipping shared components and design-system-level abstractions, evolving the backend-for-frontend (BFF) APIs that power our client applications, and improving the build, deploy, and observability systems that keep

running smoothly across surfaces.

This is a great fit if you care deeply about developer experience and want your engineering work to have outsized leverage: instead of shipping one feature, you're building the tools and systems that make dozens of features possible.