Case studies
Every engagement here started with broken or incomplete tracking. Here is what I found, what I built, and what changed.
The problem
Client was running Meta Ads essentially blind. Browser-only pixel was blocked by iOS tracking prevention and Dutch ad blockers. Roughly 35% of purchase events were never reaching Meta. ROAS calculations were built on fiction, and campaign optimization was targeting the wrong audience signals.
What I built
The problem
GA4 was installed client-side with no server container. Cookie lifetime was capped at 7 days by Safari ITP, making returning customer attribution difficult. The existing GTM container had 40+ orphaned tags from a previous agency, causing duplicate events and inflated session counts.
What I built
The problem
GA4 reports were showing roughly 60% fewer conversions than actual Shopify orders. A previous developer had set up duplicate purchase tags firing on different triggers, and the GA4 data stream had measurement ID mismatches across environments.
What I built
"We did not realize our analytics were that broken. Rehan found issues we did not know existed and documented everything clearly so we could understand exactly what had changed."
— Client, Packaging Discounter NL
The problem
Operating in a regulated industry means standard pixel implementations are frequently restricted by platforms. The client needed accurate conversion tracking despite policy constraints and separate reporting infrastructure requirements.
What I built
The problem
Meta Ads were running with no CAPI, so the pixel was the only conversion signal. iOS privacy changes reduced event visibility, and attribution did not match Shopify orders, making ROAS hard to trust.
What I built
Most setups I review have at least one critical issue. Send me a message and I will tell you exactly what yours is.
Start with a free audit