Senior UI Engineer - Design Systems

Description

• Develop, document, and showcase components in Storybook.js, supporting component-driven development and enhancing cross-team collaboration.
• Optimize UI performance through efficient rendering strategies, state management, and bundle-size improvements.
• Collaborate with product designers to translate design specifications into pixel-accurate, accessible, and performant UI implementations.
• Write clean, well-documented code, participating in code reviews to maintain high engineering standards.
• Build and maintain robust React components using Tailwind CSS and design tokens to ensure consistency, clarity, and scalability across the UI.
• Contribute to and evolve the UI design system, including Tailwind configuration, token architecture, Storybook stories, and documentation.
• Integrate frontend components with RESTful or GraphQL APIs using modern React patterns.
• Implement and extend design tokens (primitive and semantic) to align styling, spacing, typography, color, and interaction patterns across the design system.
• Troubleshoot and resolve frontend issues across environments while contributing to best practices and process improvements.
• Ensure responsive, accessible, and cross-browser interfaces, leveraging Tailwind CSS’s utility-first approach for rapid iteration.

Requirements

• 3+ years of professional frontend or UI engineering experience, ideally in enterprise-scale applications.
• Proficiency in JavaScript/TypeScript, HTML5, modern CSS, and frontend build tooling (Webpack, Vite, Babel, npm/Yarn).
• Familiarity with design system methodologies and component-driven development.
• Background with testing frameworks such as Jest, React Testing Library, or Cypress.
• Strong expertise in React, including hooks, state management, and component composition.
• Solid understanding of design tokens, both primitive (e.g., spacing, color values) and semantic (e.g., brand color roles, component-specific tokens), and how they integrate into design systems.
• Familiarity with CI/CD pipelines and cloud-native development environments.
• Track record of commitment to prior employers.
• Experience integrating frontend components with APIs and working within modern UI architectures.
• Bachelor’s degree in Computer Science, Engineering, or equivalent from an accredited, not-for-profit, in-person university or college.
• Experience maintaining or scaling complex design systems using Tailwind CSS, Storybook.js, and design tokens.
• Strong knowledge of web accessibility (WCAG) and responsive design principles.
• Advanced experience with Tailwind CSS, including custom theming, responsive design, and utility composition.
• Excellent problem-solving, communication, and cross-functional collaboration skills.
• Experience with large-scale or workflow-heavy enterprise applications.
• Hands-on experience with Storybook.js, including creating stories, documentation, and component demos.

Benefits

• 401(K) retirement plan with matching contributions
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
• Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
• Tuition reimbursement
• Commuter and parking benefits
• Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups
• Virtual and in person mental health counseling services for individuals and family
• Continued professional growth within a forward-thinking product team.
• Life, legal, and supplementary insurance
• Employee stock purchase plan
• Paid time off
• On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes
• Opportunity to influence and evolve our Tailwind-based design system, token architecture, and UI component library.

Training + Development

Interview process

Visa Sponsorship

Security clearance