Principal Software Engineer Models

What Youll Do

You will own the frontend architecture of the W&B app the product ML researchers and engineers work in every day and be accountable for app performance stability and reliability.

A single page in W&B assembles data from many parts of the product which power different product features owned by different teams. Individually those requests are all reasonable; in aggregate they contribute to increased load times and a worse experience for users. Performance here is a question of composition: what queries each page needs before it can render what queries can add to that set and how those boundaries hold as the product grows. Youll define those boundaries and make the calls they depend on.

This role is frontend-led but architecture-deep and organizationally wide. Youll spend time shaping other teams designs and building consensus across boundaries and youll own execution of your own plans when thats what it takes to land them.

In this role youll be responsible for the architecture performance and stability of the W&B Models frontend defining the frontier of innovation for the team and managing cross team requirements within the Models system. Some examples of what youll do:

• Setting performance targets and driving the work that meets them with results proven in production data
• Deciding the apps delivery and rendering architecture including how code is delivered efficiently
• Partnering with backend and platform teams on API design including moving work out of the client
• Proposing and driving the larger overhauls that incremental work cannot reach

Investing in our people is one of our top priorities and we value candidates who can bring their diversified experiences to our teams. Here are some qualities weve found compatible with our team. Wed love to talk about whether this aligns with your experience and interests and what youre excited to work on next.

Who You Are

Minimum Qualifications

• 8 years building user-facing software with deep expertise in frontend architecture and performance
• 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
• 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
• Solid client-side caching fundamentals including normalization invalidation and the failure modes that appear at scale
• 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

Preferred Qualifications

• Experience introducing automated enforcement such as lint rules CI gates or performance budgets that changed engineering behavior broadly
• Background in data-dense or visualization-heavy applications where rendering cost and data volume are the core constraints
• 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
• 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 cant be exhaustively tested

The base salary range for this role is $227000 to $303000. The starting salary will be determined based on job-related knowledge skills experience and market location. We strive for both market alignment and internal equity when determining addition to base salary our total rewards package includes a discretionary bonus equity awards and a comprehensive benefits program (all based on eligibility).

What We Offer

The range weve posted represents the typical compensation range for this role. To determine actual compensation we review the market rate for each candidate which can include a variety of factors. These include qualifications experience interview performance and location.

In addition to a competitive salary we offer a variety of benefits to support your needs. The benefits below reflect our US-based offerings for full-time employees; for roles in other locations benefits vary and are shared during the hiring process. These include:

• Medical dental and vision insurance - 100% paid for by CoreWeave
• Company-paid Life Insurance
• Voluntary supplemental life insurance
• Short and long-term disability insurance
• Flexible Spending Account
• Health Savings Account
• Tuition Reimbursement
• Ability to Participate in Employee Stock Purchase Program (ESPP)
• Mental Wellness Benefits through Spring Health
• Family-Forming support provided by Carrot
• Paid Parental Leave
• Flexible full-service childcare support with Kinside
• 401(k) with a generous employer match
• Flexible PTO
• Catered lunch each day in our office and data center locations
• A casual work environment
• A work culture focused on innovative disruption

California Applicants

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Equal Opportunity & Accommodations

CoreWeave is an equal opportunity employer committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race color religion sex disability age sexual orientation gender identity national origin veteran status or genetic information.

As part of this commitment and consistent with the Americans with Disabilities Act (ADA) CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process unless such accommodation would cause an undue hardship. If reasonable accommodation is needed please contact: .

Export Control Compliance

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.