Andrei L.

I fix broken conversion tracking and attribution across GA4, Google Ads and Meta — including server-side GTM, Stape, Meta CAPI, Shopify/Magento, cross-domain tracking and event deduplication. With 10+ years of experience in web analytics and conversion tracking, I help e-commerce, SaaS and lead-generation businesses build reliable measurement systems and troubleshoot setups where the numbers simply don't match. My focus is not just installing tags. I specialize in complex tracking environments where multiple platforms, domains, browsers, consent systems and server-side integrations need to work together correctly. WHAT I CAN HELP WITH GA4 & GOOGLE TAG MANAGER • GA4 implementation and advanced event tracking • GTM Web and Server-Side GTM • Enhanced Ecommerce • Custom JavaScript and dataLayer implementations • Cross-domain and iframe tracking • Debugging missing, duplicate or incorrectly configured events SERVER-SIDE TRACKING • Server-side GTM implementation • Stape setup and configuration • First-party tracking architecture • Browser/server event deduplication • Cookie and identifier handling • Tracking reliability under browser and privacy restrictions META CAPI & ADVERTISING TRACKING • Meta Pixel + Conversions API • Browser/server event deduplication • Google Ads conversion tracking • Enhanced Conversions • TikTok and LinkedIn tracking • Troubleshooting discrepancies between ad platforms and analytics E-COMMERCE TRACKING • Shopify • Magento • WooCommerce • Purchase and checkout tracking • Backend/server-side purchase events • Attribution preservation between websites, checkouts and payment systems TRACKING AUDITS & TROUBLESHOOTING A large part of my work involves investigating existing tracking setups where something has already been implemented but the data is incomplete, duplicated or incorrectly attributed. Typical problems I solve: • GA4 revenue does not match the backend • Meta reports duplicate or missing purchases • Google Ads conversions are underreported • Source/medium is lost during checkout • Cross-domain tracking breaks attribution • Browser and server events do not deduplicate correctly • Consent or browser restrictions cause events to disappear • Backend purchases cannot be connected to the original user/session • Different platforms report significantly different conversion numbers TYPICAL PROJECTS E-commerce measurement GA4 + Google Ads + Meta tracking for Shopify, Magento or WooCommerce, including server-side tracking and purchase attribution. Server-side tracking GTM Server + Stape architecture with GA4, Google Ads and Meta CAPI. Tracking rescue / audit Investigation and repair of existing implementations where conversions are missing, duplicated or attributed incorrectly. Cross-domain & external checkout tracking Preserving sessions and attribution when users move between a marketing website, booking system, payment platform or external checkout. TOOLS & TECHNOLOGIES GA4 • Google Tag Manager • Server-Side GTM • Stape • Meta CAPI • Google Ads • Enhanced Conversions • Shopify • Magento • WooCommerce • JavaScript • dataLayer • Consent Mode • Cookiebot • OneTrust • Looker Studio If your tracking is unreliable, platforms disagree about conversions, or you need a robust server-side measurement setup, send me a message and describe the problem. I can help identify where the data is breaking and build a reliable solution.