Software Engineer, Web Platform
Build and evolve the shared web platform infrastructure, UI components, BFF APIs, and developer tooling that powers Claude.ai across web, mobile, and desktop surfaces at Anthropic. Requires strong React/TypeScript skills, a focus on developer experience, and 5+ years building platforms or infrastructure used by other engineers.
About the job
Key Responsibilities
- Improve developer velocity across the organization by reducing friction in our build, deploy, and testing pipelines.
- Work on performance and reliability: identify and resolve latency issues, improve observability, and help establish high standards that the rest of the platform team can build on.
- Design and build shared UI components, libraries, and abstractions that product teams across Anthropic use to ship consistently and efficiently on web and mobile.
- Partner closely with product engineering teams to understand their needs, unblock them when possible, and shape platform investments around where the most impact is.
- Help maintain and evolve documentation and tooling that make the platform approachable for engineers joining or building on top of it.
Minimum Qualifications
- 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—and enjoy operationalizing those instincts in production systems.
- Thrive in fast-paced, collaborative environments and enjoy working closely with cross-functional partners.
- Pick up slack, even if it goes outside your job description.
Preferred Qualifications
- 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 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.
- Observability and monitoring (e.g. metrics, logging, tracing).
Compensation
Annual Salary: $320,000—$405,000 USD
Education
- 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.
Skills
React, TypeScript, API Design, CI/CD, Observability, Performance Optimization, Design Systems, Frontend Infrastructure, Build Systems, Deployment Automation
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