Principal Software Engineer - UI Platforms

Principal Software Engineer - UI Platforms What you will be doing:

The Principal Software Engineer (Design Systems) Is a senior individual contributor driving the architecture, development, and scaling of complex front‑end ecosystems. They build high-quality, accessible, and performant user interfaces, maintain a reusable component library, and translate design systems into production‑ready solutions. Partnering with Design and Engineering leadership, they influence front‑end standards, optimize UI performance, and ensure consistency across platforms while mentoring peers and shaping best practices.

• Responsibility #1 – 30%:
  Design System & Component Development – Lead the creation and maintenance of a scalable, reusable component library and comprehensive design system. Translate Figma and other design assets into production‑ready UI components that are visually consistent, performant, and accessible across devices. Ensure components follow best practices for responsiveness, theming, and maintainability, enabling faster development cycles and consistent user experiences across multiple products.
• Responsibility #2 – 20%:
  Technical Leadership & Architecture – Drive the evolution of front‑end architecture, tooling, and frameworks to support complex, scalable applications. Establish coding standards, design patterns, and best practices for UI development, and champion high‑quality, maintainable, and performant code. Influence decisions on technology adoption, architectural direction, and cross‑team front‑end strategy to ensure alignment and long‑term sustainability.
• Responsibility #3 – 30%:
  Collaboration & Mentorship – Partner closely with Design, Product, and Engineering teams to uphold UX fidelity and ensure design intent is translated accurately into code. Conduct thorough code reviews, provide constructive feedback, and document standards and guidelines to foster team adoption. Mentor junior and mid‑level engineers, promoting skill growth, technical excellence, and adherence to front‑end best practices.
• Responsibility #4 – 20%:
  Full‑Stack Contribution – Contribute across the full stack as needed to support back‑end integration, data flow, and end‑to‑end feature development. Collaborate with back‑end engineers to ensure APIs, data models, and services align with UI requirements, enabling seamless user experiences. Provide hands‑on support for complex problems outside the front‑end domain, leveraging full‑stack expertise to unblock development and deliver end‑to‑end solutions.

Work Experience:

10 or more years

Education:

Bachelors (Required)

• React or Front‑End Development certifications
• Full‑Stack Web Development programs
• Accessibility (WCAG) or UX‑focused certifications

• Front‑End Development: Expert proficiency in React
  , JavaScript/Type Script ,
  HTML5
  , CSS3
  , and modern styling approaches (CSS Modules, Styled Components, Tailwind).
• Design Systems & UI Architecture: Experience building and maintaining scalable component libraries
  , design systems, and reusable UI patterns. Strong understanding of accessibility standards (
  WCAG
  ) and responsive design.
• Full‑Stack Development: Familiarity with Node.js
  , REST/Graph
  
  QL APIs
  , databases (SQL/No
  
  SQL), and end‑to‑end application architecture. Ability to step into back‑end code as needed to deliver features.
• Performance & Optimization: Expertise in frontend performance optimization
  , lazy‑loading, code‑splitting, and efficient state management (Redux, Zustand, Recoil, or similar).
• Tooling & Best Practices: Skilled in CI/CD pipelines
  , testing frameworks (Jest, React Testing Library, Cypress),
  linting
  , and maintaining high code quality.
• Collaboration & Mentorship: Strong communication skills for working with designers, product managers, and engineers. Experience mentoring teams, conducting code reviews, and driving adoption of best practices.
• UX & Design Awareness: Ability to translate complex designs from Figma or Sketch into high‑fidelity, accessible interfaces with attention to visual consistency.
• Problem Solving & Innovation: Demonstrated ability to solve complex…