Middle/Senior JavaScript Developer (Web SDK) in Sigma Software

Middle/Senior JavaScript Developer (Web SDK)

Burgas (Bulgaria), Warsaw (Poland), Krakow (Poland), Poznań (Poland), remote

We're looking for a JavaScript developer to join the Web SDK team and help build a more accessible web for everyone. In this role, you will participate in the development and maintenance of SDKs that enable developers to create inclusive web applications.

This position is ideal for someone who is passionate about JavaScript, has experience with test automation frameworks, and wants to make a significant contribution to the common cause.

Client

Our client is a leading web and mobile application software company focused on automating availability for enterprises. Their AI-powered products save time and reduce risk with proprietary detection and analysis algorithms that integrate directly into software development pipelines.

Responsibilities

• Build and maintain JavaScript Node.js SDK for accessibility testing engine using frameworks such as Webdriver.io, Cypress and Playwright
• Extend the functionality of existing frameworks to improve testing capabilities and ensure efficient developer work
• Work with the team to coordinate SDK frameworks, ensuring consistency and ease of support across tools
• Participate in the Scrum process - planning, evaluating and implementing new features and bug fixes
• Ensure the reliability and usability of the SDK by following best practices in coding, testing and documentation
• Stay informed the latest in JavaScript, web development, and accessibility technologies

Requirements

• 3+ years of experience working with the JavaScript programming language and its ecosystem
• Hands-on experience with Vanilla JS
• Proven experience with test automation frameworks such as Webdriver.io, Cypress, and Playwright
• Deep understanding of web technologies, including HTML, CSS and DOM manipulation
• Knowledge of JavaScript build tools and bundlers such as Webpack, Rollup or Parcel
• Knowledge of JavaScript testing frameworks such as Jest, Mocha or Jasmine
• Experience with version control systems, including Git and GitHub
• Understanding of accessibility principles and guidelines (WCAG, WAI-ARIA)
• Testing and debugging experience cross-browser compatibility
• Knowledge of CI/CD concepts and knowledge of tools such as Jenkins, Travis CI or CircleCI
• Upper-Intermediate English language skills

• Knowledge of TypeScript and its advantages in SDK development

We're seeking a JavaScript Developer to join the Web SDK team and help build a more accessible web for everyone. In this role, you'll be instrumental in developing and maintaining SDKs that enable developers to create inclusive web experiences.

This position is ideal for those passionate aboutJavaScript, experienced with test automation frameworks, and eager to make a meaningful impact.

Customer

Our client is a market-leading web and mobile accessibility software company focused on providing accessibility automation to enterprises. Their AI-enabled products save time and reduce risk via proprietary discovery and analysis algorithms that integrate directly into software development pipelines.

Responsibilities

• Create and maintain JavaScript Node.js SDKs for the accessibility testing engine, supporting frameworks like Webdriver.io , Cypress, and Playwright
• Extend functionality of existing frameworks to enhance testing capabilities and ensure a seamless developer experience
• Collaborate with the team to harmonize SDK frameworks, ensuring consistency and maintainability across different tools
• Continuously improve SDK performance, usability, and maintainability
• Participate in the Scrum process — planning, estimating, and delivering features and bug fixes
• Ensure robust and easy-to-use SDKs by following best practices in coding, testing, and documentation
• Stay updated with the latest in JavaScript, web development, and accessibility technologies

Requirements

• 3+ years of experience with JavaScript programming language and its ecosystem
• Hands-on experience with Vanilla JS
• Proven experience with test automation frameworks such as  Webdriver.io , Cypress, and Playwright
• Deep understanding of web technologies, including HTML, CSS, and DOM manipulation
• Familiarity with JavaScript build tools and bundlers like Webpack, Rollup, or Parcel
• Knowledge of JavaScript testing frameworks like Jest, Mocha, or Jasmine
• Experience with version control systems, notably Git and GitHub
• Understanding accessibility principles and guidelines (WCAG, WAI-ARIA)
• Experience with cross-browser compatibility testing and debugging
• Knowledge of CI/CD concepts and familiarity with tools like Jenkins, Travis CI, or CircleCI
• Upper-Intermediate level of English

Would be a plus:

• Familiarity with TypeScript and its benefits in SDK development

Personal profile

• Strong analytical mindset and problem-solving skills
• Proactive and self-motivated
• Strong communication and collaboration skills
• Passion for writing clean, maintainable, and efficient code