Senior Software Engineer, CoreUX and Expansion - Weights & Biases

About the role

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

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.

Requirements

• 5+ years of professional software engineering experience, with at least 3 years deeply focused on modern JavaScript frameworks (specifically React.js).
• Expert 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 user‑centric mindset: care deeply about usability, accessibility, and reliability and have shipped UI/UX improvements that directly enhanced the customer experience.
• Excel at cross‑functional collaboration, working lock‑step with PMs and designers to iterate quickly and deliver intuitive high‑quality interfaces.

Qualifications (Preferred)

• 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

• TypeScript
• React.js
• Component architecture
• Accessibility (WCAG)
• Design systems / component libraries
• Navigation and information architecture
• Telemetry, analytics, experimentation frameworks

Benefits

• Medical, dental, and vision insurance – 100% paid by CoreWeave
• Company‑paid Life Insurance
• Voluntary supplemental life insurance
• Short and long‑term disability insurance
• Flexible Spending Account (FSA)
• Health Savings Account (HSA)
• 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 office and data center locations
• Casual work environment
• 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, the total rewards package includes a discretionary bonus and equity awards.