Principal Software Engineer - Models

Job Summary

As a Principal Software Engineer - Models at CoreWeave, you will own the frontend architecture of the W&B app, a critical product used daily by ML researchers and engineers. Your primary focus will be on ensuring the app's performance, stability, and reliability.

Responsibilities

• Define and maintain the frontend architecture of the W&B Models app
• Ensure optimal performance, stability, and reliability of the app
• Collaborate with backend and platform teams on API design and optimization
• Set performance targets and drive the work necessary to meet them
• Manage cross-team requirements within the Models system
• Propose and implement significant overhauls to improve the app's performance and capabilities

Requirements

• 8+ years of experience building user-facing software with deep expertise in frontend architecture and performance
• Proven experience leading the transformation of large, long-lived React applications with a focus on performance and product impact
• Strong command of React, TypeScript, GraphQL, and modern state management approaches
• Real performance engineering skills, including instrumentation, trace analysis, and performance improvement
• Solid understanding of client-side caching fundamentals
• Hands-on experience with bundlers and build tooling
• Backend depth to design systems at a high level and propose new API architectures
• Track record of validating ideas, coordinating across engineering teams, and sequencing work across organizational boundaries

Preferred Qualifications

• Experience introducing automated enforcement mechanisms such as lint rules, CI gates, or performance budgets
• Background in data-dense or visualization-heavy applications
• Familiarity with observability tooling such as Datadog RUM and APM
• Working knowledge of Go or a similar backend language
• Exposure to ML, MLOps, or AI agent workflows
• Experience with highly configurable products

Compensation and Benefits

• Base salary range: $227,000 to $303,000
• Comprehensive benefits package, including medical, dental, and vision insurance, company-paid life insurance, flexible spending account, health savings account, tuition reimbursement, employee stock purchase program, mental wellness benefits, family-forming support, paid parental leave, flexible PTO, and 401(k) with a generous employer match