Senior Software Engineer, CoreUX and Expansion - 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.

About the Role

The CoreUX team is dedicated to making W&B feel like a single, polished product. We drive the evolution of shared building blocks, core user journeys, and universal app surfaces to ensure consistency and accessibility at scale. With a focus on long-term ownership and excellence, the team ensures our application remains fast to build within, easy to use, and impactful across the entire product surface area.

As a Senior Software Engineer, you will work in a small but high-impact team of 2–3 engineers. You will drive the development of core UI components, patterns, and behaviors across all product areas, helping to reduce fragmentation and external dependency reliance. In this role, you’ll collaborate closely with other engineers, PMs, and cross-functional stakeholders to align on component APIs, UX consistency, and accessibility best practices (WCAG). You will set and uphold high standards for usability, code quality, and technical excellence, ensuring our "blueprints" enable the wider team to build scalable and user-friendly experiences.

Responsibilities

• Drive the development of core UI components, patterns, and behaviors across all product areas.
• Collaborate with engineers, PMs, and cross-functional stakeholders to align on component APIs, UX consistency, and accessibility best practices (WCAG).
• Set and uphold high standards for usability, code quality, and technical excellence.
• Reduce fragmentation and reliance on external dependencies.

Requirements

• 5+ years of professional software engineering experience, with at least 3 years deeply focused on modern JavaScript frameworks (specifically React.js).
• Expertise in TypeScript and component architecture, with a proven track record of delivering scalable, production-grade features.
• Ability to clarify vague requirements, articulate technical tradeoffs to non-technical partners, and align teams on complex decisions.
• Strong focus on usability, accessibility, and reliability, with experience shipping UI/UX improvements that directly enhanced customer experience.
• Excellent cross-functional collaboration skills, working closely with PMs and designers to deliver high-quality interfaces.

Preferred Qualifications

• Background in design systems or component libraries, with an eye for scalable, reusable UI patterns.
• Familiarity with navigation and information architecture design for complex applications.
• Exposure to Accessibility and Web best practices (WCAG).
• Knowledge of telemetry, analytics, and experimentation frameworks to measure and improve user experience.

Skills

• You love exploring new ideas and approaches.
• You take initiative and drive projects with accountability and care.
• You thrive in an environment where people are trusted to empower each other and bring their best work forward.
• You care deeply about delivering best-in-class client experiences, ensuring every interaction with our product feels intuitive and reliable.
• You enjoy collaborating across teams to build something greater than any of us could alone.

Benefits

• 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 (FSA) and Health Savings Account (HSA).
• Tuition reimbursement.
• 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.

Pay

The base pay for this position ranges from $139,000 to $204,000. The starting salary will be determined based on job-related knowledge, skills, experience, and market location. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).