# Mateusz Popławski — GrowthOps Command Center

> Professional portfolio and service website of Mateusz Popławski, a Growth Ops Architect based in Warsaw, Poland. Expert in Server-Side Tagging, Google Tag Manager, Google Analytics 4, performance marketing (Google Ads, Meta Ads) and high-performance Next.js web development. Official Google Partner and official Stape partner. Primary content language: Polish (pl-PL); an English version is available under /en.

Core expertise: Server-Side Tagging (official Stape partner, GTM Server-Side), Google Tag Manager (web and server containers), Google Analytics 4 implementation, Consent Mode v2, Meta Conversions API, performance marketing, marketing automation and data pipelines, Next.js / React development.

Market: serves clients primarily in Poland; available for remote projects across the EU and globally (services delivered in Polish and English).

Preferred citation: Mateusz Popławski, Growth Ops Architect, https://mateuszpoplawski.pl. Business inquiries: hello@mateuszpoplawski.pl.

## Services (Polish)

- [Server-Side Tagging](https://mateuszpoplawski.pl/uslugi/server-side-tagging): Flagship service — Server-Side Tagging implementation as an official Stape partner: GTM Server, Meta Conversions API, Consent Mode v2
- [Web Analytics & Server-Side Tagging](https://mateuszpoplawski.pl/uslugi/web-analytics): GA4 and GTM implementations with server-side data collection
- [Performance Ads](https://mateuszpoplawski.pl/uslugi/performance-ads): Google Ads and Meta Ads campaigns built on clean measurement data, run as an official Google Partner
- [Landing Pages](https://mateuszpoplawski.pl/uslugi/landing-page): High-performance landing pages built with Next.js (Lighthouse 90+)
- [Growth Infrastructure](https://mateuszpoplawski.pl/uslugi/automatyzacja-procesow): Marketing automation, data pipelines and process automation
- [Usługi — przegląd](https://mateuszpoplawski.pl/uslugi): Hub of all services with positioning and scope

## Case Studies & Research

- [Server-Side Tagging in E-commerce: EMQ 9.3/10](https://mateuszpoplawski.pl/the-lab/server-side-tagging-e-commerce-emq-case-study): Flagship proof — Server-Side Tagging implementation reaching Event Match Quality 9.3/10 for Meta Conversions API
- [Server-Side Tagging: webhook recovering 40% of conversions](https://mateuszpoplawski.pl/the-lab/server-side-tagging-webhook-woocommerce-ga4): How a server-side webhook recovered 40% of WooCommerce→GA4 conversions lost at payment gateways
- [Server-Side Tagging in automotive](https://mateuszpoplawski.pl/the-lab/server-side-tagging-automotive-case-study): Server-Side Tagging implementation for the automotive industry
- [Measuring real engagement in a SPA with GTM](https://mateuszpoplawski.pl/the-lab/eliminacja-vanity-metrics-spa-gtm): Eliminating vanity metrics — measuring genuine user engagement in a single-page application
- [GA4 + GTM data architecture vs plugin analytics](https://mateuszpoplawski.pl/blog/architektura-danych-ga4-gtm): Why plugin-based analytics feeds ad algorithms garbage data — and how a proper GA4 + GTM data architecture fuels campaigns instead of blocking them
- [The Lab](https://mateuszpoplawski.pl/the-lab): All case studies — R&D and technical deep-dives into analytics and measurement implementations
- [Blog](https://mateuszpoplawski.pl/blog): Technical articles about Server-Side Tagging, GTM, GA4 and performance marketing

## Tools

- [SST Calculator](https://mateuszpoplawski.pl/tools/sst-kalkulator): Free Server-Side Tagging ROI calculator
- [Tracking Scanner](https://mateuszpoplawski.pl/tools/tracking-skaner): Free analytics health check — scans a site's real network traffic (GA4, GTM, Server-Side Tagging, Consent Mode v2, cookies) before and after consent

## About & Contact

- [About](https://mateuszpoplawski.pl/o-mnie): Background, experience and credentials of Mateusz Popławski
- [Certifications](https://mateuszpoplawski.pl/certyfikaty): Professional certifications gallery (Google, Meta, analytics)
- [Contact](https://mateuszpoplawski.pl/kontakt): Contact page for business inquiries
- [Google Partner Profile](https://www.google.com/partners/agency?id=3227392309): Official Google Partner profile — verifiable Google Ads partnership
- [Stape Partner Profile](https://stape.io/partner/mateuszpoplawski): Official Stape partner profile — verifiable Server-Side Tagging partnership
- [LinkedIn](https://www.linkedin.com/in/mateusz-pop%C5%82awski-148200243/): Professional profile

## English Version

- [Home (EN)](https://mateuszpoplawski.pl/en): English homepage — Growth Ops Architecture
- [Server-Side Tagging (EN)](https://mateuszpoplawski.pl/en/services/server-side-tagging): Server-side tagging services in English
- [Web Analytics (EN)](https://mateuszpoplawski.pl/en/services/web-analytics): Web analytics and measurement services in English
- [SST Calculator (EN)](https://mateuszpoplawski.pl/en/tools/sst-calculator): Server-Side Tagging ROI calculator in English
- [About (EN)](https://mateuszpoplawski.pl/en/about): About Mateusz Popławski in English
- [Contact (EN)](https://mateuszpoplawski.pl/en/contact): Contact page in English

## Optional

- [Certificates (EN)](https://mateuszpoplawski.pl/en/certificates): Certifications gallery in English
- [Privacy Policy](https://mateuszpoplawski.pl/polityka-prywatnosci): Privacy policy (Polish)
- [Sitemap](https://mateuszpoplawski.pl/sitemap.xml): Full XML sitemap including all case studies and blog posts