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Quentin GarnierQG

Quentin Garnier

Expert Server-Side Tracking | GTM, GA4, GDPR

€460/day
1 project
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Quentin

🎯 Server-Side Tracking Specialist | GTM, GA4, Meta CAPI, Consent Mode v2

🔹 4+ years of experience | +40 companies supported in optimizing their data & attribution strategy

I support e-commerce businesses and companies in implementing advanced, reliable, and GDPR-compliant tracking.
My goal: recover lost data, bypass ad blockers, extend cookie lifespan, and ensure reliable conversion attribution on Meta, Google Ads, and GA4 through server-side tracking.

🚀 My expertise:
  • Google Tag Manager (Web & Server-Side) – Advanced configuration & event management
  • GA4 – Conversion implementation and tracking customization
  • Meta Conversion API & other platforms (Google Ads, TikTok, Pinterest, LinkedIn, etc.)
  • GDPR Compliance – Consent Mode v2 & CMP integration (Didomi, OneTrust, CookieBot…)
  • Event Proxying – Bypassing blockers for more reliable collection
  • Structured DataLayer Implementation for precise and scalable tracking

📈 Why work with me?

🔍 Increased Accuracy: Reliable tracking to improve your marketing performance
📊 Conversion Maximization: Complete data to optimize your ROAS
Regulatory Compliance: Tracking compliant with market requirements

Trusted by:
I have supported over **40 companies**, including So'Cup, Flytex, Cherico (featured on M6 - "Qui veut être mon associé"), as well as players in e-commerce, tech, and B2B.

Need an audit or a complete setup?
Let's discuss your needs to implement robust and high-performing tracking. 🚀
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • SO'CUP by L'EMANCIPATRICE LLP
    Server-Side Tracking Setup via GTM
    February 2025 - February 2025
    Paris, France
    I assisted So'Cup in implementing comprehensive server-side tracking to improve conversion tracking accuracy and optimize data collection.

    🔹 Audit & Scoping
    • Analysis and cleanup of existing tracking (tags, triggers, dataLayer)
    • Definition of a suitable tagging plan
    🔹 Server-Side Tracking Implementation
    • Configuration of GTM server-side & hosting on Addingwell
    • Event proxying to bypass ad blockers
    • Implementation of anti-ITP measures to extend cookie lifespan
    🔹 Migration & Compliance
    • Integration of GA4 & Meta Conversion API conversions
    • Configuration of Consent Mode v2 & CMP compatibility
    • Monitoring and tracking optimization
    Google Tag Manager Server-Side Shopify Tracking
  • Cherico
    Server-Side Tracking Setup for Cherico
    January 2025 - January 2025
    Paris, France
    I assisted Cherico, an innovative brand featured on M6's "Qui veut être mon associé", in implementing server-side tracking to optimize their conversion tracking and improve data reliability.

    🔹 Audit & Scoping
    • Analysis and cleanup of existing tracking (tags, triggers, dataLayer)
    • Definition of a tagging plan adapted to the brand's objectives
    🔹 Server-Side Tracking Implementation
    • Configuration of GTM server-side & hosting on Addingwell
    • Event proxying to bypass ad blockers
    • Implementation of anti-ITP measures to extend cookie lifespan
    🔹 Migration & Compliance
    • Integration of GA4 & Meta Conversion API conversions
    • Configuration of Consent Mode v2 & CMP compatibility
    • Testing, monitoring, and adjustments to ensure reliable collection

Reviews

5.0

Out of 1 rating

P

Pierre

Première Peau

Reviewed on 9/23/2025

Quentin is very rigorous and pleasant to work with. He quickly understands strategic issues and knows how to propose suitable solutions. Communication is fluid, deadlines are met, and his approach is always professional. A reliable, involved, and particularly smart professional, with whom collaboration is simple and effective.

Recommendations

Maxime DuchampMD
Sandro Da SilvaSD
Maxime Duchamp and 1 other person have recommended Quentin

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Education

  • Master's Degree
    ESCEN
    2021

Skill set

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