Frontend Developer (Freelance)

Smile Open Source Solutions; Sint-Pieters-Woluwe; Hybride; EUR 73 800 - 110 700; Plein temps

Résumé du poste

Smile Open Source Solutions in Brussels is seeking a talented Frontend Developer (Junior, Medior, or Senior) to join our team as a freelancer. You will craft high-performance, accessible user interfaces and translate design concepts into interactive web experiences.

The role offers a hybrid setup with 2-3 days remote per week. You will collaborate across Agile/Scrum ceremonies, mentor teammates as you grow, and work with Vue.js or React, HTML5, CSS3, and modern tooling to deliver polished

Qualifications

• 1+ years of professional frontend development for Junior, 3+ years for Medior, or 5+ years for Senior.
• Strong command of HTML5, CSS3, and JavaScript.
• Experience with Vue.js or React and modular component design.
• Solid understanding of WCAG accessibility standards.
• Experience configuring Webpack or Vite build tools.
• Familiarity with CI/CD workflows and Agile/Scrum practices.
• Experience integrating AI features or LLM components is a plus.

Responsabilités

• Develop responsive, high-fidelity frontends for complex web apps.
• Implement modular components using Vue.js or React.
• Ensure accessibility and WCAG compliance across interfaces.
• Optimize build performance with Webpack or Vite.
• Collaborate with backend, design, and data teams; contribute to CI/CD.
• Participate in Agile/Scrum ceremonies and sprints.

Connaissances

Frontend development

Vue.js

React

HTML5

CSS3

JavaScript

WCAG

Build tools

CI/CD

Agile/Scrum

AI/LLM integration

Outils

Webpack

Vite

CI/CD pipelines

Description du poste

Location: Brussels, Belgium (Hybrid: 2-3 days remote per week)

Type: Freelance

Role Overview

We are seeking talented Frontend Developers (at Junior, Medior, or Senior levels) to join our team on behalf of one of our major strategic clients based in Brussels. In this role, you will be responsible for crafting high-performance, visually stunning, and highly accessible user interfaces.

You will translate design concepts into seamless interactive web experiences while integrating modern web standards and AI features. Depending on your seniority, you will either focus on delivering high-quality modular code or take the lead in choosing architectural patterns, optimizing frontend workflows, and mentoring your team members.

Key Responsibilities

• UI/UX Development: Build responsive, high-fidelity web applications using HTML5, CSS3, and advanced JavaScript.

• Framework Implementation: Develop modular and reusable components utilizing modern frontend ecosystems, specifically Vue.js or React.

• Web Accessibility & Standards: Ensure all interfaces are fully responsive and strictly compliant with accessibility guidelines (WCAG).

• Build & Performance Optimization: Configure and optimize modern frontend build tools and bundlers like Webpack or Vite to ensure fast loading times.

• AI & LLM Integration: Collaborate with backend and data teams to seamlessly integrate AI capabilities and Large Language Model (LLM) components into the user interface.

• DevOps & CI/CD Collaboration: Work alongside the DevOps team to integrate frontend testing and deployment steps into automated CI/CD pipelines.

• Agile Teamwork: Actively participate in all Agile/Scrum ceremonies, contributing to sprint planning, daily stand-ups, and retrospectives.

Your Profile

• Experience: 1+ years (Junior), 3+ years (Medior), or 5+ years (Senior) of professional frontend development experience.

• Tech Stack: Strong command of core web technologies and proven experience with Vue.js or React.

• Accessibility Champion: Solid understanding of WCAG standards and design systems.

• Tooling Mastery: Hands-on experience with modern bundlers (Vite, Webpack) and package managers.

• Agile Mindset: Comfortable working in iterative development cycles under the Scrum framework.

• Languages (Mandatory):

  • Professional proficiency (minimum 3/4) in Dutch (NL) or French (FR).

  • Professional proficiency (minimum 3/4) in English (EN).