Doug Sirkoch
Growth
About
I'm Jesper Sterling, a digital product designer from Amsterdam. Specialized in user-centered web and mobile app interfaces, I blend minimalism with functionality.
With a master's in Interaction Design from Delft University, I started in a small studio and grew into senior roles at tech companies. I also run a nocode store and engage in the local design community and curate dark websites in my free time.
Writing
Tutorial
How to Capture UTM Parameters in GoHighLevel Forms
A simple walkthrough for syncing UTM data with your GoHighLevel contact records so you can stop guessing and start tracking.
Tutorial
Persistent UTMs: How to Keep UTMs Across Your Entire Website
A quick guide to keeping your UTM parameters alive across every page. No cookies, no guesswork, just better tracking.
Tutorial
Webflow Tutorial: Append UTM Parameters to Outbound Links Automatically
Auto-append UTM parameters from Webflow to any external links - clean, simple tracking.
Tutorial
How to Build Social Proof on Your Ads
One thing can make the difference between a successful ad campaign and one that falls flat – social proof
Tutorial
How to Track Acuity Scheduling Conversions Easily With Google Tag Manager
Start tracking Acuity conversions with Google Tag Manager and bypass the 3rd party integrations
Tutorial
How to Set Up a High Performing Retargeting Campaign
Create a high performing retargeting campaign on Facebook & Instagram with this walkthrough.
Awards
Contact
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