Freelancer profile translated to English.
Back to original languageAbout Guillaume
Expert Tracking & Analytics GDPR for e-commerce and growing SMEs
Need reliable, server-side, and compliant GA4/GTM tracking? I structure your tracking infrastructure for actionable insights without legal risks. With over 5 years of consulting experience for large groups (Edenred, L'Oréal, Club Med,..) and growing SMEs, I make your data accessible and usable.
đŻYour challenges, my tracking solutions
Is your GTM poorly configured for cross-domain? Are your Ads / Facebook CAPI conversions not tracking correctly? Do you need dashboards that truly guide your daily decisions?
I diagnose and implement:
Technical tracking configuration:
Client-side & server-side GTM, Data Layer, native GA4 implementation, comprehensive e-commerce tagging plan.
GDPR Compliance:
Consent Mode v2, CMP (Didomi, Cookiebot,...), privacy and compliance tracking audit.
Tracking performance optimization:
Multi-environment tracking, bug fixing, Facebook/Meta CAPI integration.
Dashboarding and visualization:
Identifying your data needs and creating Looker Studio, Power BI, etc. dashboards tailored for your teams.
đĄMy approach: Technical + Education
No black boxes here: I train your employees, document every step, and ensure post-implementation follow-up. You gain autonomy while precisely measuring the impact on your sales and leads.
Pragmatic, reactive, and results-oriented approach, adapted to SME constraints.
đ My background in brief
Double degree EMLyon & NEOMA (MSc Marketing & Data Analytics) | Field experience with e-commerce and major accounts | GA4, Server-Side, Power BI, Didomi GDPR certifications...
â Ready to audit your current tracking setup?
Contact me for a quick chat anda free 30-minute diagnosis.
French
Native or bilingual
English
Native or bilingual
Spanish
Conversational
Can work on-site
Nantes (up to 50km)
Experience
- ConverteoWeb Analytics ConsultantCONSULTING AND AUDITSSeptember 2022 - February 2025 (2 years and 5 months)Paris, FranceAnalytics consultant within the Converteo firm, working on complex analytics infrastructure projects for major accounts and scale-ups.Complete management of GA3âGA4 migrations with advanced e-commerce Data Layer configuration, implementation of structured tagging plans.Deployment of Tag Management Systems (client & server-side GTM).Management of analytics engineering projects on BigQuery, creation of Power BI dashboards for business KPI monitoring.GDPR support (Didomi, Consent Mode v2).Training marketing teams on Google Analytics 4, CRO, and measurement strategies.Client Accounts Supported: Edenred, TotalEnergies, BUT.fr, ClubMed, L'OrĂ©al
- EdenredWeb Analytics ConsultantCONSULTING AND AUDITSNovember 2022 - November 2023 (1 year)Malakoff, FranceConverteo mission for scoping and analytics support in the development of a new customer application (web + mobile app).Creation of an exhaustive tagging plan.Management of the Jira backlog for prioritizing tracking implementations with development teams.Google Tag Manager configuration for custom event tracking.Product analytics support, identification of tracking needs (KPIs) for business and development teams.Creation of Mixpanel, Amplitude Analytics, and Power BI dashboards.Training business and development teams on the use of analytics tools and data exploitation.GDPR implementation with Didomi (CMP).
- TotalEnergiesAnalytics Engineering ConsultantENERGY AND UTILITIESMarch 2024 - September 2024 (6 months)Paris, FranceConverteo mission focused on optimizing the Google Cloud Platform analytics infrastructure.Development and automation of SQL data pipelines on BigQuery to centralize GA3/GA4 data.GA3/GA4 data gap analysis.Complete migration to GA4 with restructuring of the tagging plan.Updates to GTM containers for tracking portability.Creation of Looker Studio dashboards for real-time strategic KPI monitoring.Management of versioning on GitHub, complete technical documentation, automated reporting of web performance.Close collaboration with data and marketing teams to ensure data quality and reliability.
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Education
- MSc Marketing & Data Analytics Neoma BSNEOMA Business School2024Spécialisation Data Analytics et Marketing Digital
- Global BBA EmLyonemlyon business school2023
Certifications
- Tag Commander Server SideCommanders Act2024
- Power BI Data Analyst Associate (PL-300)Microsoft2024