Senior Software Engineer - ML Model Training UI at Weights & Biases — ApplyScope

CoreWeave, the AI Hyperscaler™, acquired Weights & Biases to create the most powerful end-to-end platform to develop, deploy, and iterate AI faster. Since 2017, CoreWeave has operated a growing footprint of data centers covering every region of the US and across Europe, and was ranked as one of the TIME100 most influential companies of 2024. By bringing together CoreWeave’s industry-leading cloud infrastructure with the best-in-class tools AI practitioners know and love from Weights & Biases, we’re setting a new standard for how AI is built, trained, and scaled.

The integration of our teams and technologies is accelerating our shared mission: to empower developers with the tools and infrastructure they need to push the boundaries of what AI can do. From experiment tracking and model optimization to high-performance training clusters, agent building, and inference at scale, we’re combining forces to serve the full AI lifecycle — all in one seamless platform.

Weights & Biases has long been trusted by over 1,500 organizations — including AstraZeneca, Canva, Cohere, OpenAI, Meta, Snowflake, Square,Toyota, and Wayve — to build better models, AI agents and applications. Now, as part of CoreWeave, that impact is amplified across a broader ecosystem of AI innovators, researchers, and enterprises.

As we unite under one vision, we’re looking for bold thinkers and agile builders who are excited to shape the future of AI alongside us. If you're passionate about solving complex problems at the intersection of software, hardware, and AI, there's never been a more exciting time to join our team.

What You’ll Do:

You will join the fullstack Weights & Biases History team, specifically focusing on the core visualization engine that powers experiment tracking for over 1,000 organizations and labs building AI across LLMs, agents, robotics, drug discovery, and more. Our team is dedicated to building highly performant, interactive, and intuitive tools that help ML practitioners visualize complex training metrics in real-time.

About the role:

As a Front End Engineer working on Data Visualization, your primary focus will be the architecture and performance of line plots within the W&B UI.
You will scale charting components to handle millions of data points with smooth interactivity.
You will implement new features that help AI researchers at the world’s top labs explore their data and build better models.
You will collaborate with product designers to refine user experiences and with back-end engineers on your team to optimize data streaming for charts.

Who You Are:

Technical Proficiency: Extensive experience with modern JavaScript/TypeScript and React.
Visualization Expertise: Knowledge of web-based visualization libraries.
Performance Engineering: Demonstrated ability to measure and optimize front-end performance, specifically for rendering large datasets and maintaining 60fps interactions.
Curious: Work isn’t about moving tickets across a board, it’s about building deep knowledge of technical systems to improve how they function.
Collaborative: You like to share what you’ve learned with others on the team, and you’d enjoy hopping in huddles with others to debug a customer issue.

Preferred:

Background in Machine Learning workflows or a strong interest in the AI/ML ecosystem.
Experience with Canvas/WebGL or visualization libraries like Canvas/WebGL or visualization libraries like React vis or uPlot.

Why Us?

The team is a fun group of people to work with.
We’re remote friendly, but also have good representation across CoreWeave’s engineering offices in the US. And there are many opportunities for the whole team to meet up in person too.
We work on interesting technical problems, pushing browser rendering performance and visualizing terabytes of data.
We’re in an exciting stage of hyper-growth building a product central to the AI revolution.

We’re not afraid of a little chaos, and we’re constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:

Be Curious at Your Core
Act Like an Owner
Empower Employees
Deliver Best-in-Class Client Experiences
Achieve More TogetherAchieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and provides the opportunity to develop innovative solutions to complex problems. As we get set for takeoff, the organization's growth opportunities are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!

The base salary range for this role is $182,000 to $242,000. 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 compensation. In 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 we’ve 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 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

California Consumer Privacy Act

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: [email protected].

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.

Senior Software Engineer - ML Model Training UI

Job description

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