John B.

"Solved a problem we've tried to fix for months... in an hour." — That's what a client said when tracking finally worked. Every day you run ads without proper tracking, you're making decisions on broken data. Wrong attribution. Missing conversions. Wasted budget on audiences that never convert. I fix that. In the last 8 years, I've helped 400+ businesses stop guessing and start scaling—with tracking systems that actually capture what matters. Sound familiar? + Your Meta ROAS looks great in-platform but revenue doesn't match + Google Ads shows conversions that never happened (or misses ones that did) + You've tried 3 freelancers and tracking is still broken + iOS 14+ wrecked your data and you're still patching holes I specialize in making these problems disappear. "John is the most knowledgeable freelancer I could find on Upwork about GTM... I interviewed 4 freelancers and he was the only one who understood my problem." What I Build: 🔥 Server-Side GTM setups that survive ad blockers and iOS restrictions 🔥 GA4 Best practices infrastructure 🔥 Meta CAPI + Advanced Matching that recovers 20-40% of "lost" conversions 🔥 Google Ads Enhanced Conversions that feed the algorithm real purchase data 🔥BigQuery data infrastructure 🔥Segment tracking architecture 🔥 Offline conversion pipelines (Google, Meta, LinkedIn CAPI) 🔥 CRM integrations (HubSpot, Salesforce, Klaviyo, GoHighLevel, Zenoti) 🔥 Unified dashboards so you see truth, not platform vanity metrics "John went over and above to fulfil his contract. Cannot rate his professionalism and knowledge highly enough." Full Tech Stack: Tracking: Google Tag Manager (client + server), Tealium, Meta Pixel & CAPI, Google Ads, Microsoft Ads, TikTok Ads, Pinterest Ads, Snapchat Ads, Cross-domain tracking, Iframe tracking, CDP strategy, Segment, Tealium, Klaviyo, Platforms: Shopify, WooCommerce, Magento, WordPress, ClickFunnels, Bubble Analytics: GA4, BigQuery, SQL, A/B testing, experiment design, Hubspot, Salesforce, Go High Level Consent Management Platforms: OneTrust, CookieBot, TrueVault Visualization: BigQuery, Dataform, Looker Studio, Tableau, Power BI, Supermetrics Why Me: ✅ Top-Rated Plus on Upwork ✅ $300K+ earned across 128+ successful projects ✅ 7 years deep in analytics and tracking ✅ Run the largest Spanish-speaking analytics community ✅ Background in Applied Psychology — I understand user behavior, not just tags "John is amazing! Professional, punctual, dedicated, talented, fast, extremely knowledgeable. I could go on and on..." Here's what happens next: Message me with what's broken. I'll tell you if I can fix it—and how fast. Most tracking issues? Solved in days, not weeks. "Fantastic to work with, very professional. Will hire again in a heartbeat."