Principal Software Engineer - Models

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Principal Software Engineer - Models in USA

CoreWeave
Full time
Email

USA
09/19/2026
Report

Bellevue, WA

Responsibilities

Own the frontend architecture, performance, stability, and reliability of the W&B Models application.
Set performance targets, instrument the application, and drive improvements validated with production data.
Define application delivery, rendering, code-splitting, and frontend architecture decisions.
Partner with backend and platform teams on API design and moving work out of the client.
Lead large-scale architectural overhauls and coordinate requirements across engineering teams.
Shape other teams' designs, build organizational consensus, and execute owned plans through production.

Requirements

8+ years of experience building user-facing software, with deep frontend architecture and performance expertise.
Experience leading the transformation of a large, long-lived React application and owning the outcome.
Strong React and TypeScript skills with production GraphQL experience and expertise in Redux or Zustand.
Ability to analyze frontend and backend traces, identify performance bottlenecks, and quantify improvements.
Strong client-side caching fundamentals, including normalization, invalidation, and large-scale failure modes.
Hands-on experience with bundlers, build tooling, code splitting, and delivery tradeoffs.
Sufficient backend depth to design high-level systems and API architectures.
Track record of validating ideas, coordinating across engineering teams, and sequencing cross-organizational work.
Preferred: experience with automated lint rules, CI gates, performance budgets, data-dense or visualization-heavy applications, and configurable products.
Preferred: familiarity with Datadog RUM and APM or comparable observability tools, working knowledge of Go, and exposure to ML, MLOps, or AI agent workflows.

Benefits

US full-time benefits include fully company-paid medical, dental, and vision insurance; life insurance; disability insurance; flexible spending and health savings accounts; tuition reimbursement; ESPP participation; mental wellness benefits; family-forming support; paid parental leave; childcare support; and a 401(k) with employer match.
Flexible PTO, a casual work environment, and catered lunch at office and data center locations are offered.
The role includes a discretionary bonus and equity awards in addition to base salary.
Benefits vary by location for roles outside the United States.

Salary: $227k - $303k/yr

CoreWeave

CoreWeave is the Essential Cloud for AI. CoreWeave is a cloud purpose-built for scaling, supporting, and accelerating GenAI. We’re a comprehensive platform and strategic partner designed to tackle today—and tomorrow’s—challenges of deploying AI at scale. We manage the complexities of AI growth to...

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