Software Engineer II [UX Engineer – Design System]

Chewy•Boston, MA

7d•$120,000 - $190,000

About The Position

Our Design System team is focused on building composable, accessible, and business-logic-agnostic UI primitives that power multiple application teams. As a UX Engineer, you will partner closely with Product Design, Accessibility, and Frontend Platform teams to create scalable architecture, robust theming systems, and world-class developer experience. Your work will directly influence the consistency, accessibility, and velocity of engineering teams across the organization.

Requirements

5+ years of experience building modern frontend applications
Deep expertise in React and TypeScript, including advanced patterns (compound components, controlled/uncontrolled APIs, polymorphic components, hooks architecture)
Strong knowledge of CSS architecture, including theming strategies, design tokens, CSS-in-JS or modern styling approaches
Demonstrated experience building and maintaining reusable component libraries
Deep understanding of web accessibility (WCAG 2.x, ARIA patterns, semantic HTML)
Experience architecting frontend systems consumed by multiple teams
Strong understanding of component API design and developer ergonomics
Experience creating or contributing to documentation systems (Storybook, MDX, etc.)
Strong collaboration skills working cross-functionally with design and engineering
Bachelor’s degree in Computer Science or related field, or equivalent experience

Nice To Haves

Experience building or scaling an enterprise Design System
Experience implementing multi-brand or multi-theme architectures
Familiarity with design token pipelines and automation
Experience with frontend build tooling and bundling strategies
Experience creating code mods or migration tooling to support system evolution
Knowledge of performance optimization techniques for component libraries
Experience mentoring engineers and setting frontend standards
Background in e-commerce or high-scale consumer platforms
Experience working in Agile environments

Responsibilities

Architect and develop clean, composable, and extensible UI primitives using React and TypeScript
Build business-logic-agnostic component foundations that can scale across multiple domains and teams
Design and implement advanced CSS architecture and theming systems (design tokens, CSS variables, theming APIs)
Ensure components meet and exceed WCAG accessibility standards, including deep ARIA pattern implementation
Establish strong patterns for composition, state management boundaries, and extensibility
Drive API design decisions with a focus on ergonomics and long-term maintainability
Partner with designers to translate design tokens and Figma libraries into scalable engineering abstractions
Build documentation, examples, and usage guidelines to optimize developer adoption and experience
Create tooling, linting rules, and guardrails to prevent design system fragmentation
Collaborate with application teams to support adoption and solve integration challenges
Evaluate performance implications of component architecture and ensure lightweight, performant foundations
Contribute to long-term platform strategy and frontend architecture decisions

Benefits

401k
new hire and annual equity grant
annual bonus
medical/Rx insurance
vision insurance
dental insurance
life insurance
disability insurance
hospital indemnity insurance
critical illness insurance
accident insurance
parental leave
family services benefits
backup dependent care
flexible spending accounts
telemedicine
pet adoption reimbursement
employee assistance program
10% off pet insurance
20% off at Chewy.com
unlimited PTO (subject to manager approval)
six paid holidays
paid sick and family leave (in compliance with applicable state and local regulations)