Model Quality Software Engineer, Claude Code at Anthropic

We're looking for a Software Engineer to work at the intersection of engineering and research on the Claude Code team. In this role, you'll collaborate directly with Anthropic's researchers to improve Claude's coding capabilities through tooling, infrastructure, and evaluations. You'll build systems that help us understand where Claude Code excels and where it falls short — and then help close those gaps.

Responsibilities:

Design and build eval systems that measure model capabilities across diverse coding tasks

Build tooling and infrastructure that enables researchers to run experiments at scale

Develop pipelines for data collection, processing, and analysis

Create internal tools that improve researcher productivity

Serve as a bridge between product and research

Work closely with researchers to translate research questions into engineering solutions

Own systems end-to-end

You may be a good fit if you:

Have built and owned complex systems

Thrive in high-intensity environments

Are a power user of agentic coding tools

Have at least 5 years of work experience

Strong candidates may also have experience with: eval frameworks, reinforcement learning, Python and TypeScript.

Salary: $320,000-$485,000. Location: SF/NYC hybrid. Visa sponsorship available.