Senior Frontend Engineer, React UI Library (Warsaw)

LanceSoft Europe; Warszawa; Hybrid; PLN 190,000 - 290,000; Full time

Job summary

LanceSoft Europe is seeking a hands-on Frontend / UI Engineer in Warsaw to join a global UI Engineering team responsible for a React-based component library and design system. You will build, maintain and extend reusable UI components used across multiple applications and teams, collaborating with designers, engineers and stakeholders.

The role emphasizes React + TypeScript, accessibility, performance, and test coverage, with participation in a distributed environment across Warsaw, London and

Qualifications

• Hands-on React and TypeScript experience.
• Experience building reusable UI components.
• Experience with component libraries and design systems.
• Knowledge of accessibility standards (WCAG) and testing.
• Strong collaboration with designers and engineers.

Responsibilities

• Design, develop and maintain reusable React UI components for a shared library.
• Work with designers and teams to translate requirements into production components.
• Maintain and enhance components, APIs, theming and styling.
• Troubleshoot frontend issues and improve tooling.
• Participate in a support rota and ensure code quality.

Skills

React

TypeScript

Frontend engineering

Component libraries

Design systems

Accessibility

Testing (RTL/Cypress)

Collaboration

Tools

React Testing Library

Cypress

Bazel

Monorepo tooling

Job description

LanceSoft Europe is seeking a hands-on Frontend / UI Engineer in Warsaw to join a global UI Engineering team responsible for a React-based component library and design system. You will build, maintain and extend reusable UI components used across multiple applications and teams, collaborating with designers, engineers and stakeholders.

The role emphasizes React + TypeScript, accessibility, performance, and test coverage, with participation in a distributed environment across Warsaw, London and