Wanna talk?

You can contact me on Facebook Messenger. Whether it's for support for one of my side projects, you have another question or you just want to talk, please try to not send an email but go through Facebook Messenger. It will increase your odds of getting an answer to about 100%! 😊

Want to know more about me?

Jelle is a technical marketer, with a passion for the internet, new technologies and side projects. He's Head of Side Projects at The Growth Revolution, where he makes very cool side projects for awesome companies.

He started making websites from a young age. First in Dreamweaver, later in Flash (😱). The more websites he made, the more he started programming; first in PHP, now mainly in Python and Javascript/node.

He has created tons of side projects. Some of them got in the news in Belgium and the Netherlands. Others went viral on reddit and quite a few have proven to be quite lucrative side gigs.

In his spare time he likes to create more side projects, watch Flemish TV shows (pre-2005) and drink delicious Belgian beers.

Side projects he has made

Bol.com Rekeningopvuller - 2015

Originally this was an interactive tool (made with React.JS) where you enter the amount you're short. A-B testing showed that people preferred just an overview of all the products.

More info.

Prijzenvolger (discontinued) - 2015

A price tracker I made that tracked the prices of over 15 million products in 50 Belgian and Dutch online shops. It was written completely in PHP (using the Laravel framework). It was hosted on AWS and Digitalocean. First it used MySQL to store all the data, but later I used Elasticsearch to save all the product data.

Marketingwise I learned a whole lot about GTM here. I even managed to install Enhanced E-commerce on it (although it was not a webshop).

At the time I launched it, I was still a student with a lot of free time to work on it. Maintaining it while working a full-time job was too hard, and the AWS charges kept creeping up. So I discontinued it.


A Chrome extension to help people scrape certain things, like Facebook groups or Producthunt upvoters. Made with the Vue.JS framework, which I absolutely love now!

More info.


A Chrome Extension to help marketing people create triggers/tags/variables straight from a website. It uses the GTM API to push those triggers, etc straight to GTM.

Also made with VueJS.


  • Introduction to Computer Science CS50 – HarvardX (edX)

  • Becoming an Entrepreneur – MIT.x Launch.x (edX)

  • Machine Learning – Stanford Univeristy (Coursera)


  • Go-to stack and other tech: VueJS, Django, AnimeJS, Bulma.

  • 🐶 ❤️

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