Stijn W.

Tracking is the foundation of profitable marketing. If your data is inaccurate, your ad platforms optimize on bad signals, your attribution is unreliable, and decisions become guesswork. I help businesses build tracking systems they can trust. I'm a Top 1% Upwork expert with 10+ years of experience and 320+ successful projects, specializing in Google Tag Manager, Google Analytics 4 (GA4), Server-Side Tracking, Meta Conversions API, Google Ads Enhanced Conversions, and BigQuery. I've worked with startups, 8-figure ecommerce brands, and enterprise companies, including Neil Patel, Argenx, and SEB Bank. I can help with: * Google Tag Manager (Web & Server-Side) * GA4 implementation, migration, audits & debugging * Server-Side GTM (Stape) * Meta Pixel & Conversions API (CAPI) * Google Ads Enhanced Conversions * Consent Mode v2 & CMP integrations * Shopify tracking * WooCommerce tracking * Data Layer implementation * Cross-domain & cross-platform tracking * BigQuery integration & reporting * Looker Studio dashboards * Offline conversion tracking * Attribution & data quality audits Common problems I solve: * GA4 doesn't match Google Ads or Meta * Missing or duplicate conversions * Poor Event Match Quality * Consent Mode v2 reducing attribution * Broken ecommerce tracking * Server-side tracking that's incorrectly configured * Inaccurate ROAS and attribution reporting * Tracking issues after a website migration or redesign My approach goes beyond installing tags. I build measurement systems that connect your website, advertising platforms, CRM, and backend so your marketing platforms receive complete, high-quality conversion signals. Every implementation is thoroughly tested using browser debugging, network requests, Tag Assistant, GA4 DebugView, and platform diagnostics to ensure your tracking is accurate before handover. What you can expect: * Clean, scalable implementations * Clear communication * Fast turnaround * Well-documented setups * Long-term reliability * Ongoing support when needed If you're looking for a tracking specialist who focuses on accuracy, data quality, and long-term reliability, I'd be happy to discuss your project.