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Principal Front-end Developer (Accessibility Product House)

Sigma Software

Office

Warsaw, Masovian Voivodeship, Poland

Full Time

Company Description

We’re seeking a Principal Front-end Developer to join the team and help build a more accessible web for everyone. The primary mission of our Front End team is to develop, deliver, and maintain high-quality, accessible UIs for web applications, ensuring the best experience for our customers.  

This position is ideal for an expert in Front-end development who would like to build high-quality, scalable, and modular UI systems for web-based SaaS products.

Job Description

  • Develop, test, and maintain frontend components with a focus on accessibility
  • Build high-quality, scalable, and modular UI systems for web-based SaaS products
  • Contribute to the design and implementation of SPAs, browser extensions, design tool plugins, and internal UI component libraries
  • Optimize front-end performance and system efficiency
  • Participate in design and code reviews to ensure best practices
  • Collaborate with other engineering teams to integrate across the product stack
  • Apply testing methodologies using modern automation frameworks for front-end quality assurance

Qualifications

  • 8+ years of experience with JavaScrip/TypeScript using React/Redux or Next.Js

  • Experience with E2E Front-end development of complex enterprise-grade/SaaS applications 

  • Strong HTML/CSS capabilities 

  • Experience with Styling & UI Libraries: Styled Components, StoryBook

  • Experience with testing frameworks and methodologies (UT/E2E) 

  • Experience working with State/Data Management - React Query

  • Practical experience using Testing Tools - Playwright or Cypress

  • Knowledge of working with Integration APIs: Figma API, Chrome API

  • Ability to write and reason about clean and modular code 

  • Values good UX and pixel-perfect 

  • Strong communication skills

  • English written and spoken - Advanced

Will be a plus:

  • Experience with accessibility 

  • Experience building a component library and contributing to open source 

  • Experience with Figma 

Principal Front-end Developer (Accessibility Product House)

Office

Warsaw, Masovian Voivodeship, Poland

Full Time

August 11, 2025

company logo

Sigma Software

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