Principal Software Engineer (Models)

Join our team as a Principal Software Engineer (Models) and take ownership of the frontend architecture of the W&B app. You will be responsible for app performance, stability, and reliability, and will work closely with other teams to shape designs and build consensus. This role requires a deep understanding of frontend architecture and performance, as well as experience in coordinating across engineering teams and sequencing work that spans organizational boundaries.

Responsable de l'architecture frontend de l'application W&B, en veillant à la performance, la stabilité et la fiabilité de l'application.

About CoreWeave

Experience introducing automated enforcement such as lint rules, CI gates, or performance budgets that changed engineering behavior broadly

Responsibilities

• Définir les limites des requêtes nécessaires pour le rendu des pages et prendre des décisions éclairées sur l'architecture de livraison et de rendu de l'application.
• Collaborer avec les équipes backend et plateforme sur la conception de l'API, en proposant et en conduisant des révisions majeures qui ne peuvent pas être atteintes par un travail incrémental.
• Have led the transformation of a large, long-lived React application with a focus on performance, product impact and dev experience and owned the outcome
• Hands-on experience with bundlers and build tooling, and clear views on code splitting and delivery tradeoffs
• Enough backend depth to design systems at a high level. You can propose a new API architecture in service of a faster client and reason about its frontend implications
• Track record of validating ideas, coordinating across engineering teams, and sequencing work that spans organizational boundaries
• An operator mindset: you measure, you ship, you follow through, and you stay close to production
• Solid client-side caching fundamentals, including normalization, invalidation, and the failure modes that appear at scale

Requirements

• Strong command of React and TypeScript, with production experience in GraphQL and a modern state management approach such as Redux or Zustand, including opinions on when each is the right tool
• Real performance engineering skill: you can instrument an application, read both frontend and backend traces, determine precisely where time is going, and prove the improvement with numbers
• 8+ years building user-facing software, with deep expertise in frontend architecture and performance
• This position requires access to export controlled information.
• To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency.
• CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process
• Background in data-dense or visualization-heavy applications where rendering cost and data volume are the core constraints
• Exposure to ML, MLOps, or AI agent workflows, or genuine curiosity about the researchers and engineers who use these tools
• Experience with a highly configurable product, where the space of user and deployment settings can't be exhaustively tested

Preferred

• Familiarity with observability tooling such as Datadog RUM and APM, or comparable tracing and session-replay stacks
• Working knowledge of Go or a similar backend language

Pay

USD 227,000 - 303,000