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Hi there, I'm Koen! 👋🏼

I'm a passionate & entrepreneurial JavaScript developer from the Netherlands who likes to push the web beyond it's limits. I specialize in modern frontend using React & Svelte and I also feel at home on the backend using Node/TypeScript. I'm interested in helping inspiring companies create innovative web apps that users love.

You can also find me on LinkedIn Twitter and on Mastodon


  1. pong-wars pong-wars Public

    HTML 1.1k 134

  2. Public

    Math for kids using Svelte & Sapper

    Svelte 70 10

  3. svelte-gundb-chat svelte-gundb-chat Public

    Realtime decentralized chat - demo app for gundb

    Svelte 69 15

  4. finding-nora finding-nora Public

    Find your name in a field of letters (kids game)

    TypeScript 42 4

  5. lumber-jack lumber-jack Public

    Jack the Lumberjack using Mobx

    TypeScript 5

  6. size-of-npm size-of-npm Public

    Size of NPM

    JavaScript 26