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Mattias S.MS

Mattias S.

Senior Front-end Developer

€600/day
Brussel, BE
15+ years

Average response time: 1 hour

About Mattias

I'm a Senior Front-End Developer with a strong focus on user experience and UI development. I have solid experience working on e-commerce platforms and large-scale digital transformation projects building intuitive user interfaces and front-end design systems.


My strength lies at the intersection of design and development, where my eye for detail challenges design decisions while ensuring technical feasibility and clean, maintainable code.
  • Dutch

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Hellogoodbye
    Freelance Frontend Developer
    July 2010 - Today (15 years and 11 months)
    Brugge, Belgium
    Web development studio with more than 100 custom build WordPress sites, web applications and e-commerce projects completed. Known for building pixel-perfect, user-centered interfaces that require strong technical expertise and a sharp eye for detail. Trusted by digital agencies like D'Artagnan, Newdays, Uruku, Mediafin & Proud Mary for delivering high-quality work and maintaining long-term partnerships.
    Wordpress User Interface Design PHP CSS
  • Craftzing
    Partner & Front-end Developer at Craftzing Studio
    November 2020 - August 2023 (2 years and 9 months)
    Antwerp, Belgium
    Joined as partner at The Entourage, later transitioned to Head of Front-End at Craftzing following the merger in 2020. Led front-end strategy across clients, established scalable component systems, and defined development standards. Focused on knowledge sharing, technical mentorship, cross-team consistency and front-end quality control.
    Front-End development Vue Typescript Design System
  • Vlaamse Overheid
    Frontend Developer
    June 2017 - Today (9 years)
    Brussels, Belgium
    Lead front-end developer across multiple agile teams in large-scale digital transformation projects like the award-winning Mijn Burgerprofiel, Digital Real Estate Platform, Task Force COVID-19, KLIP / GIPOD – serving over 3 million users monthly. Key contributor to the shared design system and Vue component library, serving as go-to central source of expertise on front-end best practices, UI development, and accessibility. Developed interactive, map-driven Vue components deeply integrated with the OpenLayers API — pushing browser limitations to enable advanced geospatial interaction. Known for challenging design decisions, preserving design subtleties during development cycles and advocating for reusable front-end architecture across teams.
    Vue.js Typescript Front-End development User Interface Design

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Skill set

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