Senior Web Platform Engineer — Build Shared Tools & APIs

Anthropic

California (MO)

Hybrid

USD 320,000 - 405,000

Full time

14 days+

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Benefits offered by this job

Equity donation matching

Generous vacation and parental leave

Flexible working hours

Office space in San Francisco

Job summary

Anthropic is seeking a Software Engineer on the Web Platform team to build the platform powering Claude.ai across web and mobile surfaces. You will design shared UI components, evolve BFF APIs, and improve build, deploy, and observability systems to scale engineering velocity.

The role emphasizes developer experience and building tools that enable dozens of features, rather than shipping a single feature. Hybrid work in the US with strong collaboration across teams.

Qualifications

Strong hands-on experience with modern web tech (React/TypeScript) and API design for frontend apps.
Proven ability to boost developer velocity by reducing build and deployment friction.
Reliability, observability, and performance mindset applied to production systems.

Responsibilities

Improve developer velocity by reducing friction in build, deploy, and testing pipelines.
Improve latency, observability, and reliability across the platform.
Design and build shared UI components and libraries used by product teams.
Collaborate with product engineering to align platform investments with impact.
Maintain documentation and tooling for engineers joining the team.

Skills

React

TypeScript

API design

Developer experience

Cross-functional collaboration

Education

Bachelor’s degree

Tools

CI/CD

Observability tooling

Job description

The role emphasizes developer experience and building tools that enable dozens of features, rather than shipping a single feature. Hybrid work in the US with strong collaboration across teams.

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