Anthropic
Model Performance Software Engineer, Claude Code
$405K–$485K
San Francisco, CA +2 · Full-time · Posted Feb 2, 2026
- Location
- San Francisco, CA
New York City, NY
San Francisco, California, United States - Experience
- 10+ years of software engineering experience; minimum years also correlate with internal job-level requirements.
- Education
- Bachelor’s degree or an equivalent combination of education, training, and/or experience; relevant field demonstrated through coursework, training, or professional experience.
- Visa sponsorship
- Visa sponsorship is available, but not for every role or candidate; the company says it will make every reasonable effort to obtain a visa after an offer.
About the job
Sets technical direction and builds evaluation systems, research infrastructure, and tooling to measure and improve Claude’s coding capabilities.
What you'll do
- Architect evaluation frameworks and scalable experiment infrastructure for coding research.
- Own critical systems from design through production reliability; drive high-impact engineering investments.
- Partner with research and product leaders, set technical direction, and mentor engineers.
What they ask for
- 10+ years of software engineering experience, with a track record as a Staff or Principal engineer (or equivalent).
- Experience architecting and owning complex, high-stakes systems serving multiple teams.
- History of setting technical direction and influencing team or organizational practices.
- Strong ownership, reliability, and technical judgment; able to work across engineering and AI research.
Nice to have
- Experience scaling ML evaluation frameworks, reinforcement learning infrastructure, or training systems.
- Expertise in Python and TypeScript; experience in research computing, scientific infrastructure, or developer platforms at scale.
Pay
$405,000 — $485,000 USD (annual base salary)
Tools
Python, TypeScript
AI focus
Builds evaluation and research infrastructure to measure and improve Claude’s coding capabilities; partners with researchers on AI research workflows.
Model-written summary · the original posting is authoritative