I build the systems that turn traffic into revenue.
Thirty minutes. I go through your tracking, your funnel, and your attribution, and show you exactly where revenue is leaking.
Case Studies
GTM engineering case studies: attribution pipelines, conversion-optimized growth sites, AI tooling, and acquisition systems built by Jovan Zatezalo.
Attribution & Analytics
2
Case studies
Growth Sites
2
Case studies
Booking Dentist
Connected Meta and Google spend to actual booked revenue for a dental booking platform.
- Problem
- Ad platforms were each claiming the same bookings, and nobody could say which channel produced real, paying patients. Spend decisions were being made on platform-reported conversions that didn't reconcile with the books.
- Build
- A full attribution pipeline: back-office sales exports feeding Google Sheets, loaded into BigQuery, modelled against GA4 and Meta Pixel events, and surfaced in Looker Studio. Then consulted on the SEO and funnel changes the data pointed to.
- Result
- Organic search now brings in 126K clicks a year from 14M impressions at an average position of 11.3, and every booking can be traced back to the channel that produced it.
Passionista.rs
3.9x return on tracked ad spend and 255% revenue growth for a multi-market Shopify brand.
- Problem
- A storefront selling across Serbia, Bosnia, and Croatia with no reliable link between ad clicks and orders, which made every scaling decision a guess.
- Build
- Customized the Shopify storefront and implemented end-to-end analytics: GA4 and Meta Pixel wired to the real order data, so campaign performance could be judged on revenue instead of platform estimates.
- Result
- €34,266 of Meta spend returned €134,707 in tracked purchase value, a 3.9x ROAS. Store revenue grew 255% to RSD 17.9M against the prior period, with conversion rate up 41% to 1.23%.
eskuter.rs
Lead-generation site and booking flow for a premium electric moped brand.
- Problem
- A premium product with no digital channel to capture demand, qualify it, or get it into a sales pipeline.
- Build
- A mobile-first, bilingual Next.js site with a test-ride booking flow, financing estimator, and spec showcase. Wired Resend for transactional email, a CRM pipeline for lead capture, and GTM so every step of the funnel is measurable.
- Result
- Launched with the funnel instrumented end to end: every test-ride booking, financing enquiry, and enquiry form is traceable from first touch through to the CRM.
ActionRPG.com
An SEO-driven content platform with a custom back-office for publishing at volume.
- Problem
- Organic content was the entire acquisition strategy, but publishing was a bottleneck and the platform had to scale to a global audience.
- Build
- Led full-stack development: a Next.js front-end on a MongoDB backend deployed to Vercel, plus a custom back-office dashboard so content creators could publish and manage guides without engineering involvement.
- Result
- Publishing moved out of engineering entirely. Content creators ship and manage guides through the back-office without a deploy.
Want to see what yours would look like?
Thirty minutes. I go through your tracking, your funnel, and your attribution, and show you exactly where revenue is leaking.