Freelancer profile translated to English.
Back to original languageAbout Sébastien
Expert Tracking & Web analyst - GTM Server-Side · 8 years of experience
Specialist in **marketing tracking and analytics**, I support e-commerce and marketing teams in implementing reliable and RGPD-compliant tracking to improve the quality of data used to drive digital performance.
For 8 years, I have been working primarily on advanced tracking issues, Google Tag Manager (client & server-side), web analytics, and Consent Mode.
I have notably supported several major clients on these topics: Air Caraïbes, French Bee, SNCF (CRMS), Stych, Kinougarde, L’Entrepôt du Bricolage.
My main interventions:
🏷️ Tracking & Google Tag Manager
• Implementation GTM client and server-side
• Structuring dataLayer
• Debugging and tracking correction
📊 Web Analytics
• Implementation and migration GA4
• Advanced e-commerce tracking
• Audit and tracking reliability
📣 Advertising Tracking
• Meta / Facebook, Google Ads, LinkedIn, TikTok…
• Implementation Meta CAPI and server-side
🔒 RGPD & Consent Mode
• Implementation Consent Mode v2
• CMP integration (Didomi, Axeptio, OneTrust, Cookiebot)
(DPO CNIL certification in progress)
📌 Mission Formats
I can undertake various types of missions:
✔ Audit and tracking correction
✔ Complete GTM / GA4 implementation
✔ RGPD / Consent Mode compliance
✔ Regular support (1 to 5 days / month)
💶 Rate: €490 HT / day
Remote or on-site possible (Isère / Rhône-Alpes).
French
Native or bilingual
English
Fluent
Can work on-site
Grenoble (up to 50km)
Experience
- KPInsight AnalyticsTracking & Data Collection Expert / Technical Web AnalystCONSULTING AND AUDITSApril 2018 - January 2026 (7 years and 9 months)Grenoble, France-Management of tracking and data projects for major clients (Air Caraïbes, French Bee, SNCF, Edenred, System U, Stych, Entrepot du Bricolage, Flroajet, Vocable, Kinougarde…)-Implementation of tagging plans and implementation via GTM (client & server-side)-Development of custom trackers (dataLayer, JavaScript) to ensure data collection reliability-Implementation and management of analytics tools (GA4, Matomo, Piano)-Integration of marketing pixels (Google Ads, Meta, Bing…)-Improvement of data quality and reliability for marketing analysis-Technical DPO, Consultant and RGPD compliance (CMP: Didomi, OneTrust, consent mode)-Development of custom JavaScript tools (attribution, collection, reporting)-A/B testing and user journey optimization
- Auto-EntrepriseWeb DesignerJanuary 2011 - January 2016 (5 years)Grenoble, FranceSelf-employed - "HS Design". Creation of animated banner ads. Business card creation. Photo retouching and editing. Full newsletters. Web page mockups.
- BEE-BUZZINESSAnimatorJanuary 2010 - April 2010 (3 months)Grenoble, France• Animation of PDF sheets in Adobe Flash.• Use of ActionScript/JavaScript.Web Design
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Education
- Full Stack Developer, Back / FrontÉcoles Aries2019Developpeur Full stack, Back / Front
- Integrator, UX optimization | HTML5 CSS SassÉCOLE BRASSART2018integrateur, optimisation UX l HTML5 CSS Sass