Jules Balouin

One and a half years of support for the UX & Data department on all their analytics and engineering challenges, successfully navigating a complex GA3 to GA4 migration:

Tracking (Tag Commander, GTM, SGTM, Firebase, Javascript)

• Complete migration of GA3 tracking to GA4 on web (server-side) and app, ensuring more efficient data collection

• Advanced integration of ContentSquare with TagCommander to enrich behavioral analysis

• Server-side implementation of chatbot tracking via GA4's measurement protocol

• Management of tracking integration and evolution requests for web and app journeys, in close collaboration with product teams

Data Analysis and Dashboarding (Google Analytics, GA4, ContentSquare, Looker Studio, BigQuery, SQL)

• Migration of 10+ dashboards to Looker Studio, connected to GA4 and consolidated tables in BigQuery

• Reconstruction and consolidation of key business indicators (selfcare rate, "Ma Conso" usage rate, customer area usage frequency, etc.) for managers and executives

• Customer segmentation for analysis and activation via marketing tools

• Presentation and analysis of monthly performance to two strategic committees

Engineering (GitHub, Jenkins, DBT)

• Migration of data pipelines for daily and monthly automation of SQL queries with Jenkins and collaboration on GitHub

Team Support and Training

• Led 3 GA4 training sessions for 20 people (PO, PM, Media, UX, UI)

• Supported teams and provided personalized follow-up to strengthen their autonomy on GA4 and understanding of key indicators

• Mentored two consultants on web & app tracking and BigQuery analysis (SQL)

One year of support for Carrefour Management (group level), coordinating with teams from 10 countries. Creation, maintenance, and evolution of two centralized dashboards for global e-commerce performance monitoring. Led the GA3 to GA4 migration, ensuring country alignment with group recommendations. Trained and upskilled local teams on analytics topics to enhance their autonomy and expertise.

Dashboarding (BigQuery, SQL, Google Analytics)

• Supervised two data engineers in extracting data from GetFeedback and App Annie APIs, with precise requirement definition

• Managed projects in sprint mode (bi-weekly) for dashboard creation and optimization

• Consolidated all country GA data within the group onto BigQuery, aligned with expectations for unified insights

• Created and structured tables from GetFeedback and App Annie APIs to enrich dashboards

• Automated queries using BigQuery scheduled queries

• Maintained dashboards and pipelines, including query updates and DML

Tracking (GTM, Firebase)

• Rigorous monitoring of recommendation implementation, ensuring compliance with the global tagging plan

• Supervised integration projects carried out by local country agencies

• Proactively identified roadblocks and supported country teams to ensure priority integrations were completed on time

Team Support and Training

• Monthly led the analytics community to share feedback and key information with country teams

• Created documentation, best practice guides, and led training sessions on ContentSquare, Firebase, deep links and dynamic links, GA4, and analysis

• Provided technical assistance on GTM

Supported Carrefour France in transitioning their applications to GA4, migrating from TagCommander to Firebase, and implementing dual GA3 & GA4 tracking.

This mission optimized application data quality through comprehensive testing and agile project management, collaborating with product teams to fix anomalies on iOS and Android. Close cooperation with product and development teams enabled the structuring of new tracking integration processes, ensuring rigorous monitoring of features and reliable performance measurement.

Tracking (TagCommander, GTM, Firebase, GA4, ContentSquare)

• Wrote a GA3 / GA4 tagging plan for the migration from TagCommander to Firebase.

• Created and managed all necessary tickets for the progressive integration of the new tagging plan.

• Rigorous monitoring to ensure integration within deadlines.

• Wrote documentation and configured ContentSquare on the application, thereby enriching user analysis.

• Created tickets for the integration of dynamic links and deep links to measure the impact of media levers on the application.

• Led workshops with POs, PMs, and Lead Developers to optimize tracking integration processes and improve data quality.

• Performed comprehensive testing to identify and resolve tracking anomalies on both OS.

• Configured GTM and GA4 to quickly start data collection and establish a history.

Team Support and Training

• Provided technical assistance to development teams to ensure tracking integration quality.

• Led workshops to understand deep link and dynamic link needs.

• Provided personalized support to facilitate understanding of the GA4 data model and strengthen analysts' autonomy in KPI interpretation.