CoreWeave
Principal Software Engineer - Models
$227K–$303K
San Francisco, CA, Bellevue, WA, Sunnyvale, CA, New York, Livingston, NJ +1 · Principal · Full-time · Posted Sep 18, 2026
- Location
- San Francisco, CA, Bellevue, WA, Sunnyvale, CA, New York, Livingston, NJ
San Francisco, California, United States - Experience
- 8+ years building user-facing software; no alternatives stated.
- Visa sponsorship
- Position requires access to export-controlled information. Applicants must meet one of the stated U.S. person, export authorization eligibility, or likely-to-obtain-authorization criteria; CoreWeave may decline to pursue export licensing for legitimate business reasons.
About the job
Own the architecture, performance, and reliability of the W&B Models frontend, coordinating across teams and driving improvements to how the app fetches, renders, and delivers data.
What you'll do
- Set performance targets and lead improvements validated with production data.
- Define app delivery and rendering architecture, including efficient code delivery.
- Partner with backend and platform teams on API design and larger architectural overhauls.
What they ask for
- 8+ years building user-facing software, with deep expertise in frontend architecture and performance.
- Led and owned the transformation of a large, long-lived React application focused on performance, product impact, and developer experience.
- Strong React and TypeScript skills, plus production GraphQL experience and a modern state management approach such as Redux or Zustand.
- Performance engineering experience, including instrumentation, trace analysis, and proving improvements with numbers.
Nice to have
- Experience with automated enforcement such as lint rules, CI gates, or performance budgets; or data-dense and visualization-heavy applications.
- Familiarity with observability tooling such as Datadog RUM and APM, Go or a similar backend language, or ML/MLOps/AI agent workflows.
Pay
$227,000 to $303,000 USD base salary
Tools
React, TypeScript, GraphQL, Redux, Zustand, Datadog RUM, APM, Go
AI focus
Exposure to ML, MLOps, or AI agent workflows is preferred; the role focuses on the W&B Models frontend used by ML researchers and engineers.
Model-written summary · the original posting is authoritative