Senior Software Engineer, Workspaces- Weights & Biases

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 The Models team builds and maintains the core user experience for tracking, visualizing, and analyzing machine learning experiments at Weights & Biases. Our full‑stack engineering team works closely with Product, Design, and Platform partners to deliver high‑impact, customer‑facing features. We balance strong foundations in performance and reliability with a focus on building intuitive tooling that supports ML workflows at scale for both individual researchers and large ML organizations. About The Role As a Senior Software Engineer on the Models team, you will build core features that directly improve how ML engineers interact with and understand their experiment data. You will solve complex technical challenges across the stack to unlock faster, more reliable, and more intuitive user experiences. Working closely with Product and Design, you will translate nuanced user needs into high‑quality, user‑facing implementations. This role emphasizes technical ownership, iterative delivery, and raising the bar for performance and reliability at scale. Who You Are 5+ years of professional software engineering experience building and operating production web applications. Demonstrated experience owning and delivering complex, user‑facing features end to end, from technical design through release. Strong experience with frontend development, including building complex user interfaces using React and TypeScript. Strong experience with backend development, including designing, implementing, and maintaining backend services. Proven ability to solve complex technical problems that impact performance, reliability, or usability in large‑scale applications. Experience working with APIs and data‑fetching layers, with an understanding of how backend design affects frontend performance and user experience. Ability to independently drive technical decisions and break down ambiguous problems into iterative, deliverable work. Demonstrated technical leadership through influencing architecture, establishing or evolving technical patterns, and raising engineering best practices within a team or across the organization. Preferred Experience working on data‑intensive or analytics‑heavy web applications. Experience with GraphQL APIs, including query optimization and performance tuning. Experience with Go or another compiled backend language. Experience improving frontend performance for complex, highly interactive user interfaces. Familiarity with tools, workflows, or products used by ML engineers, data scientists, or research teams. Experience contributing to or evolving shared technical patterns and best practices across multiple teams. Why Us? We work hard, have fun, and move fast! We’re in an exciting stage of hyper‑growth that you will not want to miss out on. 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 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 growth opportunities within the organization 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! What We Offer The base salary range for this role is $165,000 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). In addition to a competitive salary, we offer a variety of benefits to support your needs, including: 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 Our Workplace While we prioritize a hybrid work environment, remote work may be considered for candidates located more than 30 miles from an office, based on role requirements for specialized skill sets. New hires will be invited to attend onboarding at one of our hubs within their first month. Teams also gather quarterly to support collaboration. California Consumer Privacy Act – California applicants only. Equal Opportunity 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 View email address on click.appcast.io. 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 (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; or (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. #J-18808-Ljbffr Weights & Biases