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Frontend Developer with React
  • Warsaw
Frontend Developer with React
Warszawa, Warsaw, Masovian Voivodeship, Polska
Sii Sp. z o.o.
18. 10. 2025
Informacje o stanowisku

technologies-expected :


  • React.js
  • JavaScript
  • TypeScript

technologies-optional :


  • CSS3
  • Next.js
  • Jasmine
  • Cypress

about-project :


  • Join a global banking client’s team and help shape the company’s visual language across hundreds of applications. In this role, you’ll be part of a central, cross-location team developing and maintaining an enterprise-level UI components library used firmwide. You’ll work on innovative projects built with React and TypeScript, focusing on modern technologies and clean architecture — with no legacy code. This hybrid position requires 3 days per week in the Warsaw office.

responsibilities :


  • Design, build, and enhance reusable UI components in React
  • Deliver new features, resolve issues, and release new package versions
  • Collaborate with UX designers, architects, and other teams to translate requirements into scalable solutions
  • Perform code reviews and ensure code quality through testing
  • Support internal teams in integrating UI libraries into their products
  • Continuously research and adopt new front-end technologies to improve performance and accessibility

requirements-expected :


  • Minimum 5 years of experience in modern front-end development (React, TypeScript)
  • Strong understanding of web technologies, browser APIs, and component-based architecture
  • Experience with testing (unit tests with Jasmine/RTL, E2E tests with Cypress)
  • Familiarity with CSS-in-JS, PWAs, SSR frameworks (Next.js/Gatsby), and accessibility (WCAG)
  • Excellent communication skills in English, enabling effective collaboration within an international team
  • Residing in Poland required

  • Praca Warszawa
  • Warszawa - Oferty pracy w okolicznych lokalizacjach


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