Frontend Developer - UI

CollectOnline; Oost-Vlaanderen; Hybride; EUR 60 000 - 90 000; Plein temps

Résumé du poste

CollectOnline is seeking a senior front-end developer who can design and build new screens, translating brand guidelines into solid front-end code. You will work with the CTO and CEO for final sign-off, contributing to DunningOnline and RecoverOnline.

The role combines design and implementation with an emphasis on accessibility, responsive HTML/CSS, Bootstrap, TypeScript and Vue.js, while collaborating with the Symfony/Twig backend team. Hybrid working is available from Ghent.

Qualifications

• Senior experience (5+ years) making UI/UX decisions.
• Able to conceive interfaces from a blank canvas.
• Strong HTML5, SCSS and Bootstrap skills.
• Proficient in TypeScript and Vue.js.
• Familiar with Twig, PHP, Symfony and Linux.
• WCAG 2.2 AA accessibility knowledge.
• Fluent in Dutch and English.

Responsabilités

• Conceive screens and interactions yourself for DunningOnline and RecoverOnline, with our brand style (colors, typography) as the fixed framework.
• Translate those designs 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.

Connaissances

UI/UX decision making

Prototyping

Communication with leadership

Fluent Dutch & English

Outils

Bootstrap

Vue.js

TypeScript

SCSS

Twig

Symfony

Figma

Git workflows

Description du poste

CollectOnline builds intelligent order-to-cash and debt management software — with DunningOnline and RecoverOnline, we help businesses in more than 14 European countries get paid faster and more efficiently. We're a Belgian SaaS scale-up with a newly opened office in Ghent, growing fast across product, sales and team.

About the Role

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.

Qualifications

Senior experience (5+ years) in a role where you made UI/UX decisions yourself, not just executed designs handed to you.

Required Skills

• 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 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.

Pay range and compensation package

• Permanent contract with CollectOnline NV.
• Based at our office in Ghent (3Square, Zwijnaarde), with the option of hybrid working under our company policy.
• Real design and build autonomy over the look and feel of our product, with direct access to the CTO and CEO.
• A growing, ambitious team within a Belgian SaaS scale-up expanding internationally.