Hello! I’m Pascal, a creative, resourceful and innovative Front End Developer / UX Optimizer from Enschede. I’m the guy you need to make your website interact, perform and convert better—through precise experimentation and performance engineering that actually moves the needle.
It’s my pride and passion.
What I do
I specialize in high-velocity experimentation platforms: GrowthBook, Optimizely, Convert, and Cloudflare. Building testing architectures that scale isn’t just about handling traffic—it’s about creating frameworks where behavioral insights and technical performance work together to drive genuine conversion improvements.
Latest post
How To Detect User-Defined Window Globals with JavaScript (Enhanced)
During A/B testing and conversion optimization work, third-party scripts often pollute the global window scope. This can cause conflicts, memory leaks, or unexpected behavior in … read more.. about How To Detect User-Defined Window Globals with JavaScript (Enhanced)
More posts
Building the Ultimate A/B Testing Developer Experience
How I transformed experimentation development from tedious manual processes into a seamless, production-integrated workflow As developers, we've all been there: copying code between environments, manually refreshing browsers, juggling multiple build processes, and wrestling with deployment pipelines just to test a simple button color change. After years of building A/B tests and personalization campaigns across multiple clients, I decided enough was enough. Here's how I … read more about Building the Ultimate A/B Testing Developer Experience
Building a Developer-Friendly Chrome Extension: Script Redirector with Live Reload
As a developer working on conversion rate optimization (CRO) projects, I often found myself needing to test locally built JavaScript against live production websites. The traditional approach of constantly uploading files or modifying production code was both slow and risky. That's when I decided to build MintMinds RequestLite — a Chrome extension that solves this problem elegantly. The Problem When developing JavaScript for live websites, you typically face these … read more about Building a Developer-Friendly Chrome Extension: Script Redirector with Live Reload
How To List User Defined Window Globals with Javascript
There might be occasions where you want to inspect what is defined on the Window object, for instance is jQuery or Google Analytics loaded, or are there third party scripts that pollute your global Window scope? In that case this script might come in handy. If you run it in your browsers console, it will create an object containing all user defined globals, nicely subdivided by type. It works as follows: first, we declare 2 arrays, one empty called 'filteredPropKeys' … read more about How To List User Defined Window Globals with Javascript
How to simulate clicks on non-supported HTML elements
Working on an AB test, I had to write some code that involved using a clone for a clickable element. The original HTML element, an <svg> element, had to be hidden and replaced by a button. What this button should do is simple: hide a pop up on click. My first thought was, I add a click event listener to that button and just pass that click to the original element like so: Simple! Thank you all those years of experience, this should do the trick, right? What I … read more about How to simulate clicks on non-supported HTML elements