> Markdown version of [/jobs/ext/2950058-frontend-developer-ui](https://www.wearedevelopers.com/jobs/ext/2950058-frontend-developer-ui). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Frontend Developer - UI - **Company:** CollectOnline - **Location:** Gent, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** HTML, PHP (Programming Language), Web Accessibility, HTML5, Bootstrap (Software), Browser Compatibility, Cascading Style Sheets (CSS), Software as a Service, Code Review, Linux, Design of User Interfaces, Routing, Performance Tuning, Symfony, TypeScript, Web Content Accessibility Guidelines, Web Usability, Backend, Vue.js, Twig (templating), Git Flow, Figma, Front End Software Development - **Published:** September 17, 2026 - **Apply:** https://www.adzuna.be/details/5886259519 ## About the Role Senior experience (5+ years) in a role where you made UI/UX decisions yourself, not just executed designs handed to you., * Strong design instinct: you can independently conceive a good, user-friendly interface from a brand style, with no existing pattern library. * Strong, semantic HTML5 skills - you build pixel-accurate work that a colleague doesn't need to redo. * Strong SCSS skills (variables, mixins, nesting) and experience with Bootstrap as a CSS framework. * Strong TypeScript skills, including working with a build/compile step. * Strong Vue.js skills (component architecture, state management, routing) for the DunningOnline SPA. * Basic working knowledge of Twig, PHP, Symfony and Linux for the RecoverOnline side - you won't write backend code, but you can move comfortably in that environment. * Knowledge of performance optimization (Core Web Vitals) and cross-browser/cross-device testing. * Knowledge of accessibility standards (WCAG 2.2 AA). * Comfortable working with Figma (or similar) to prototype your own designs, not just to read designs handed to you. * Experience with Git workflows (branching, pull requests, code review). * A portfolio showing that you've conceived and built UI/UX yourself - not just executed other people's designs. * Comfortable presenting and aligning design proposals with the CTO and CEO. * Fluent in Dutch and English. Preferred Skills * Experience with Nuxt.js or similar Vue tooling. * Experience with PHP, Symfony or Twig beyond a basic working knowledge. * Interest in or experience with SaaS products in a B2B context. ## Description To keep building out our platform, we're looking for a senior front-end developer who is as much a designer as a builder. You won't be handed ready-made mockups: you'll come up with new screens and interactions yourself - with our brand style (colors, typography) as the only fixed framework - and then translate that into solid, working front-end code within our product. You'll work with our CTO on a day-to-day basis, and align new screens and interactions with the CTO and CEO for final sign-off. This isn't a role for a purely graphic designer who never touches code, nor for a developer who only builds logic without an eye for what ends up on screen. We're looking for someone who can conceive a good interface from a blank canvas and build it themselves. Responsibilities * Conceive screens and interactions yourself for DunningOnline and RecoverOnline, with our brand style (colors, typography) as the only fixed framework. * Translate those designs yourself into performant, responsive HTML, SCSS and TypeScript, built on Bootstrap. * Help build and maintain the DunningOnline SPA in Vue.js and TypeScript. * Integrate front-end code for RecoverOnline into our Symfony/Twig environment, in consultation with the CTO. * Monitor and optimize the performance of screens (load time, Core Web Vitals, asset optimization). * Ensure semantic, accessible HTML throughout the platform, in line with WCAG 2.2 AA. * Align new screens and interactions with the CTO and the CEO for final sign-off. * Work closely with the CTO on architecture, planning and the quality of the front-end. ## Related Videos - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [Bridging the Gap](https://www.wearedevelopers.com/videos/794-bridging-the-gap) - [Boost Productivity with AI: Figma & Playwright MCP Workflows - Aris Markogiannakis](https://www.wearedevelopers.com/videos/1768-boost-productivity-with-ai-figma-playwright-mcp-workflows-aris-markogiannakis) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Can SVG be fast? 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