Our client is seeking a Senior UI Engineer to take full ownership of a core design system and component library used across multiple digital platforms. The role sits at the intersection of design, frontend engineering, and operational stability, with a strong focus on high-quality, framework-agnostic UI components.

This position combines deep technical craftsmanship with responsibility for accessibility, cross-browser reliability, and production support in a high-availability environment.

• Own and evolve a core component library built with Vanilla JavaScript (ES6+) and SCSS, distributed via NPM.
• Translate Figma designs into pixel-perfect, reusable UI components with high visual fidelity.
• Act as the subject-matter expert for accessibility, ensuring strict compliance with WCAG and ARIA standards.
• Manage package versioning and release strategies, maintaining stable production and development streams.
• Ensure consistent behavior across browsers and devices through extensive testing using tools such as BrowserStack.
• Support integration of the component library into various frontend stacks (e.g. TypeScript-, React-, or Next.js-based applications).
• Provide L2/L3 production support and act as an escalation point to ensure UI stability in critical situations.
• Develop and maintain technical documentation and templates using Nunjucks.
• Define and enforce code quality standards, including linting, testing, and architectural guidelines.