Freelancer profile translated to English.
Back to original languageAbout Jean-Daniel
🚀 Senior Data Analyst | Power BI • SQL • BigQuery | SAP Business Objects Migration | Modern Data Stack
Many companies have large amounts of data but struggle to transform it into reliable and actionable insights for decision-making.
I support data and business teams in structuring, analyzing, and leveraging their data to build high-performing decision-making tools.
🎯 Expertise
- Data Analysis & Data Storytelling
- Creation of Power BI / Looker-LookML / MyReport / SAP Business Objects dashboards
- Power BI Dashboarding for Retail
- BI Migration: SAP Business Objects → Power BI & Looker-LookML
- Data modeling and SQL optimization
- Modern Data Stack (BigQuery, dbt, modern BI tools)
đź“Š Achievements
- 500+ interactive dashboards developed
- 5+ companies supported
- SQL query optimization reducing analysis time
- 70% reduction in analysis time on certain projects
Interventions notably at ADEO / Leroy Merlin, Orange France, Cofidis, and Supplay.
đź› Stack
Power BI (DAX, Power Query) • Looker-LookML • SAP Business Objects • BigQuery • SQL • Python • MyReport • Advanced Excel • SAS...
đź“Ť Paris / Lille / Full Remote
€ Daily Rate: €500 Paris – €430 Lille & Remote
Available for freelance missions.
French
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- LEROY MERLINData analystRETAIL (LARGE RETAILERS)October 2024 - December 2025 (1 year and 2 months)Lille, France📅 BI Modernization Program – Migration of SAP Business Objects to Power BI & Looker📍 Data SUPPLY Squad – BOARDNEXT TeamAs part of the group's Business Intelligence modernization program, I contributed to thedecommissioning of SAP Business Objects and the migration of dashboards to a Modern Data Stack based on Power BI, Looker, and BigQuery.🎯 Project ObjectiveReplace thelegacy SAP Business Objects BI environmentwith modern tools to improve:
- analysis performance
- indicator reliability
- business team autonomy
🚀 Interventions.- Migration ofSAP Business Objects reports to Power BI and Looker
- Validation and reliability ofautomatically generated Looker dashboards
*Analysis of discrepancies between the legacy environment and new dashboards- Performance optimization (**BigQuery, SQL, DAX**)
- Improvement of theBI migration engineused internationally
- Implementation ofdata quality and consistency controls
- Training and support forbusiness teams on the new BI tools
🛠Data StackPower BI (DAX, Power Query) • Looker • BigQuery • SQL • Connected Google Sheets • SAP Business Objects • Jira • Confluence. - SupplayData AnalystHUMAN RESOURCESSeptember 2022 - September 2024 (2 years)Lille, France📅 Creation of the Business Intelligence Department & Implementation of a Group BI PlatformAs part of structuring data within the group, I participated in thecreation of the Business Intelligence departmentand the implementation of thecomplete decision-making chain (data pipeline → analysis → dashboards)to centralize and leverage data from **190 agencies**, CRM, and websites.🎯 ObjectiveImplement a high-performingBusiness Intelligence platformto improve the management of the group's commercial, financial, and HR activities.🚀 Interventions
- Implementation of the **complete decision-making chain**: data collection, modeling, and reporting
- Centralization and analysis of data from **190 agencies**, CRM, and web platforms
- Definition and construction ofstrategic KPIs(agency revenue, commercial performance, HR management)
- Creation of150+ BI reports and dashboards**, enabling a **70% reduction in analysis time
- Design ofmonthly and annual management reports(finance, sales, management, and HR)
- Migration and creation ofPower BI dashboards from MyReport reports
- Development and automation ofETLs and daily data flows
- Industrialization and automated distribution ofBI reports
- Training and support forbusiness teams on dashboard usage
🛠Data & BI StackPower BI (DAX, Power Query) • SQL • PostgreSQL • MyReport (Data, Builder, Page, Administrator) - ORANGEDATA ANALYST - BUSINESS OBJECT DEVELOPMENTTELECOMMUNICATIONSFebruary 2020 - August 2022 (2 years and 6 months)Villeneuve-d'Ascq, France📅 Management and evolution of the BI chain – Migration from COGNOS → Business Objects & Teradata → BigQuery📍 Team of 4 people – Orange ProjectAs part of the BI environments modernization, I participated in thecomplete management of the BI chainandcritical migrationsfor the legal and commercial scope.🎯 Project Objectives
- Modernize the existing BI platform
- Ensure reliability and centralization of data for strategic reporting
- Migrate legacy environments to high-performance BI tools
🚀 Interventions*Business Objects (BO) developmentfor theKENOBI / DTO / VOLTAGEscopes- Management and evolution of theBI chainfor traffic and commercial monitoring
*Teradata → GCP / BigQuerymigration to centralize data- Construction ofstrategic KPIsfor management
- Creation and maintenance ofBO universes
- Training and support for employees on the BI platform
- Production deployment and writing oftechnical documentation
🛠Data & BI StackBusiness Objects (BO) • COGNOS • Teradata SQL • BigQuery • GCP • HTML
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Education
- Master Information Systems for Decision Support (SIAD)Université de Lille2019L’objectif du Master SIAD (Systèmes d’information et aide à la décision) est de répondre à la demande croissante de spécialistes maîtrisant les aspects techniques de la chaîne informationnelle (informatique décisionnelle), capables d’apporter un diagnostic quantitatif des situations et une approche prévisionnelle de la décision, en s’appuyant sur une connaissance profonde des problématiques métiers.