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Senior Full Stack Engineer with focus on Front-end (Accessibility Product House)

JavaScript

Senior Full Stack Engineer with focus on Front-end (Accessibility Product House)

JavaScript

Emilii Plater 53, Warszawa

Sigma Software

Full-time
B2B
Senior
Remote

Tech stack

    English

    B2

    JavaScript

    advanced

    TypeScript

    advanced

    React

    advanced

    Redux

    regular

    HTML/CSS

    regular

    Playwright or Cypress

    regular

    Backend

    junior

Job description

We’re looking for an experienced Fullstack Engineer who’s especially strong on the frontend side. This role focuses on frontend excellence while actively contributing to the essential backend systems that power the tool. It offers the perfect balance between frontend craftsmanship and backend engineering.

Customer

Our client is a rapidly growing technology leader in digital accessibility software that helps enterprises make their web and mobile offerings accessible to everyone.

Requirements

Frontend (80% focus):

  • 5+ years of experience with JS/TS using React

  • Experience with Redux

  • Experience with E2E Frontend 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)

  • Practical experience using Testing Tools – Playwright or Cypress

  • Experience working with State/Data Management – React Query

  • Ability to write and reason about clean and modular code

  • Values good UX and pixel-perfect

  • Strong communication skills

  • At least Upper-Intermediate level of English

Backend (20% focus):

  • Proven commercial experience in back-end development (any programming language is acceptable).

  • Familiarity with back-end system-design principles, including API definition and integration.

  • Ability to design and implement relational database structures.

 

Would be a plus

  • Experience with accessibility

  • Experience building a component library and contributing to open source

  • Experience with Figma


Responsibilities

  • Develop, test, and maintain frontend components with a focus on accessibility.

  • Contribute to the improvement of backend services that power the product you’re building.

  • Enhance backend services to better facilitate product development.

  • Build high-quality, scalable, and modular UI systems for web-based SaaS products.

  • Optimize frontend 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 frontend quality assurance.

Published: 23.09.2025

Meet the company

Sigma Software

Sigma Software is a global software development company that enables enterprises, startups, and product houses to meet their technology needs through end-to-end delivery. We have been working since 2002, from all over the world.

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Senior Full Stack Engineer with focus on Front-end (Accessibility Product House)

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Senior Full Stack Engineer with focus on Front-end (Accessibility Product House)

Emilii Plater 53, Warszawa

Sigma Software

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