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Malt Strategy
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Malt Tech Trends 2026
Guillaume R.GR

Guillaume R.

🎯 Expert GTM · CAPI · Google Ads & Meta Ads

€420/day
1 project
Lille, FR
8-15 years
Google Tag Manager
Facebook CAPI
Server-side tracking
E-commerce tracking
Google Ads Tracking

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

📡 Your tracking is losing data. Your campaigns are paying the price.

Ad blockers, Safari ITP, consent refusals: on average, 30 to 40% of conversion events never make it back to Meta or Google Ads. Your algorithms are optimizing on incomplete data — and your ROAS is suffering.
I'll get your data back on track.

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🔧 WHAT I IMPLEMENT

Tracking Audit— Complete diagnosis of your GTM, GA4, pixels, and dataLayer setup. Identification of losses, duplicates, and missing events. Structured deliverable with clear priorities.

GTM Server-Side (sGTM)— Deployment via Stape or Addingwell, migration of tags to the server-side, average recovery of +37% of events on my client implementations.

Meta Conversions API (CAPI)— Pixel + CAPI in parallel, event deduplication, optimized quality score. Compatible with Shopify, WooCommerce, PrestaShop, YouCan.

Google Ads Conversion Tracking— Enhanced Conversions, GA4 imports, Consent Mode v2. Your Smart Bidding and tROAS powered by reliable data.

Consent Mode v2 & GDPR— CMP integration (Cookiebot, Axeptio) with GTM, behavioral modeling enabled, ePrivacy compliance.

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😎 WHY WORK WITH ME

✔ 20+ clients supported on Shopify, WooCommerce, PrestaShop, and YouCan
✔ Dual expertise: tracking + Google Ads — I configure what improves your downstream performance
✔ No unnecessary jargon: clear diagnosis, actionable priorities, measurable results

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🚀 WHAT'S NEXT

Once your tracking is reliable, I'll work on your Google Ads campaigns (Search, Shopping, Performance Max) to fully leverage the quality of the data put back in place.

👉 Click on “Propose a mission” to discuss your project.
E-commerce
Press and Media
Education Companies

  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Lille (up to 50km), Lyon (up to 50km), Toulouse (up to 50km), Marseille (up to 50km), Paris (up to 50km)

Experience

  • FASTLANE
    Growth Partner - Automation
    EDUCATION AND E-LEARNING
    April 2026 - April 2026
    Paris, France
    ✅ Complete overhaul of Google Ads conversion tracking for webinar registrations (Google Tag Manager, custom events)
    ✅ Implementation of an automated workflow via Make: webhook trigger → Notion CRM population → automatic WhatsApp message via SendPulse API → prospect follow-up email
    ✅ Parallel architecture: CRM and WhatsApp notifications triggered simultaneously for each new registration
    ✅ Stack: Framer · Google Tag Manager · Make · Notion · SendPulse (WhatsApp Business API)
    Make Automation WhatsApp Automation Customer Relationship Management (CRM) Notion Google Tag Manager
  • Boxing Bull
    E-commerce and Google Ads Tracking Consultant
    E-COMMERCE
    February 2026 - Today (4 months)
    Paris, France

    E-commerce Tracking & Server-Side Redesign

    ✅ Audit of existing tagging: identification of event losses, duplicates, and misconfigured conversions
    ✅ Complete redesign of the e-commerce dataLayer (impressions, add-to-cart, purchase, refunds)
    ✅ GTM Server-Side deployment via Stape: migration of GA4, Google Ads, and Meta tags to the server-side
    ✅ Meta Conversions API (CAPI) implementation in parallel with the client-side pixel with deduplication
    ✅ Result: +37% of actionable conversions recovered after switching to server-side
    ✅ Google Ads campaigns (Search, Performance Max) under optimization — attribution data consolidating
    ✅ Make.com workflow - Notion CRM and follow-up email
    E-commerce tracking Google Ads Tracking Google Tag Manager Server-side tracking Make Automation
  • Confort Vision
    Growth Partner
    HEALTH AND WELLNESS
    January 2026 - Today (5 months)
    Lille, France

    Meta Tracking Reliability on a YouCan Store with Multiple Campaigns


    ✅ Audit of the existing Meta setup: identification of pixel conflicts and misattributed events
    ✅ Multi-pixel architecture (5 pixels) with complete event splitting per pixel and per campaign objective
    ✅ Advanced configuration via Google Tag Manager and Meta Business Suite
    ✅ Event deduplication and validation via Meta Events Manager
    ✅ Result: -23% on the average cost per purchase after improving attribution reliability
    Google Tag Manager Facebook CAPI E-commerce tracking Meta Ads
Check out Guillaume's experience

Reviews

5.0

Out of 1 rating

PabloP

Pablo

Indigo Ads

Reviewed on 5/28/2025

Guillaume's work is exceptional. I hired him to update the conversion tracking on an e-commerce store, and he identified and resolved the issues efficiently and quickly. I highly recommend him!

Recommendations

Pablo LabignePL
LD
Pablo Labigne and 1 other person have recommended Guillaume

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Education

  • Bachelor's Degree in Computer Science
    The Open University
    2020

Certifications

Skill set

Conversion Tracking
Facebook Pixel
E-commerce
Google Merchant Center
Shopify
Prestashop
WooCommerce
Google Tag Manager
Conversion Optimization
Server-side tracking
Facebook CAPI
Google Ads
Google Analytics 4
Google Shopping
Google Ads Campaign

Categories