Romain O.

MarTech & Tracking Specialist | GA4, GTM, Meta CAPI, Zapier, Hubspot

🏆 Upwork Expert-Vetted Talent ( Top 1% Data, Tracking and Analytics) 🏆 100% Job Success I design and build the data infrastructure behind marketing decisions: from server-side tracking to BigQuery pipelines to AI-powered reporting, using Python to automate and connect it all. With 10+ years in analytics and martech, I help businesses move past basic tag implementation toward reliable, scalable data architecture that survives cookie deprecation, privacy regulation, and platform changes. 🌟 Data Pipeline & Architecture - Server-side GTM (Stape, GCP Cloud Run) for durable, privacy-compliant tracking - BigQuery pipelines: incremental syncs, backfills, multi-source data warehousing - Python scripts for data normalization, backfills, and pipeline orchestration - Cloud Functions / Cloud Scheduler orchestration for automated data flows - CRM-to-warehouse integrations (HubSpot, Salesforce) for unified reporting 🌟 Conversion Tracking & CAPI - Meta, TikTok, and Google Ads Conversion API implementation - Offline conversion pipelines (Google Ads Data Manager API), built with Python for hashing, deduplication, and batch processing - Cross-platform deduplication and event match quality optimization - GDPR-compliant PII hashing and consent-aware tracking 🌟 AI-Powered MarTech - Python-based automation connecting marketing data to AI APIs (Claude, OpenAI) - Automated anomaly detection on tracking pipelines and conversion data - AI-generated reporting summaries from Looker Studio / BigQuery data - Natural-language querying layers for non-technical stakeholders 🌟 Why work with me - Upwork Expert-Vetted Talent, 100% Job Success, $500K+ earned - 10+ years across e-commerce, SaaS, and multi-market clients (EU, US, France) - I don't just implement tracking, I build the architecture and automation that keeps your data trustworthy as platforms and regulations shift