Frontend/UI Engineer

Frontend/UI Engineer - React/TypeScript, Warsaw, Hybrid, 5 days in office
You will:

• Build and maintain a large-scale, React-based component library that provides the shared design system and UI foundation for web applications across the firm

• Design and ship production UI components, ensuring high consistency, comprehensive test coverage, and strict accessibility compliance (WCAG)

• Diagnose and resolve bugs across the component library, theming/styling layer, and build tooling

• Collaborate closely with design and platform teams to ensure all components meet design system and performance standards

• Scale AI-driven workflows by using AI coding agents (like Claude Code) as a core part of your daily workflow

• Design and implement UI-related agent skills, contributing improvements back to the internal tooling

You bring:

• Proven experience building UIs, component libraries, and/or design systems at scale

• Strong knowledge of React and TypeScript (plus basic familiarity with Angular for maintenance purposes)

• Solid experience with modern styling architectures, specifically CSS-in-JS and Sass

• Deep understanding of web accessibility standards (WCAG) and hands-on experience building accessible components

• Experience with testing tools (React Testing Library, Cypress) and build/monorepo tooling (Bazel)

• Hands-on experience with Claude Code (or equivalent agentic coding CLIs), effectively directing AI agents within large, convention-heavy codebases

• Ability to actively evaluate and improve AI-agent workflows, including prompts, skills, and guardrails