Frontend Web Developer – Design System & UI Library

About the role

Keonn, a specialist in RFID hardware and software, is looking for a Frontend Web Developer to join its cloud platform team. You will blend design and programming to create accessible, high‑performance user interfaces that power our retail and healthcare solutions.

Key responsibilities

• Develop and maintain reusable web components for the company Design System and UI library.
• Design components and page mockups in Figma and translate them into production‑ready code.
• Write unit and end‑to‑end tests using Jest, Vitest or Playwright.
• Collaborate with other developers, designers and product owners.
• Document code, patterns and component usage.

Required profile

• Computer Science or Software Development degree (preferred, not mandatory).
• 2‑3 years of full‑time experience as a frontend developer.
• Strong communication skills in English (B2+) and Spanish.
• Legal residence in the EU or a valid work permit for Spain.

Required skills

• JavaScript ES6+
• HTML5, CSS3, Sass
• Vue.js (or similar modern framework)
• Web Components
• Figma (or equivalent design tool)
• npm, Webpack, Vite, Babel
• Git and GitHub
• Jest, Vitest, Playwright for testing
• Responsive Web Design
• Knowledge of accessibility guidelines (WCAG)