Freelancer profile translated to English.
Back to original languageAbout Oussama
Certified Microsoft Power BI expert with 8 years of experience, I transform complex sources (SQL Server, BigQuery, Talend, etc.) into interactive reports and high-value business dashboards. As a technical referent and trainer, I support my clients from data collection to visual presentation, building and optimizing high-performance semantic models (DAX / Power Query).
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Secteur du luxePower BI Tech LeadDecember 2025 - Today (6 months)• Member of the COE (Center of Excellence), responsible for defining and applying Power BI best practices across the group.• Technical support and mentoring of developers on complex DAX, modeling, and performance optimization issues.• Audit and validation of Power BI reports before production release to ensure the consistency, reliability, and scalability of deliverables.• Design and implementation of Datamarts on Snowflake, with advanced SQL development for analytical models and semantic consistency.• Use of dbt for creating transformation pipelines and delivering KPI indicators in the Gold layer of the Medallion architecture.• Collaboration with data engineers and business teams to align BI models with data strategy and governance rules.• Driving continuous improvement in dataset certification, workspace management, and report lifecycle automation.
- EDFData Analyst / Engineer - Power BI ExpertSeptember 2024 - December 2025 (1 year and 3 months)• Design and implementation of end-to-end BI architectures (Data Warehouse, ETL, Cubes, Reporting).• Use of the SQL Server suite (SSIS, SSAS, SSRS), Power BI, and Power Query to develop scalable BI solutions.• Creation of predictive and financial dashboards ensuring data historization, traceability, and security.• Management of the migration from Power BI Report Server to Power BI Service (workspaces, roles, gateways, pipelines).• Building data ingestion and transformation pipelines with PySpark and orchestrating the medallion architecture via Airflow.• Development of tabular models and automation of Power BI packaging to improve performance and scalability.• Application of Agile/SCRUM methodologies and contribution to the improvement of BI governance and delivery practices.
- SIG FRANCEPower BI ExpertSeptember 2022 - September 2024 (2 years)• Administration of a Premium P3 tenant and management of Power BI governance.• End-to-end design: Data collection, modeling (DAX / Power Query), and presentation.• Industrialization: SQL Server views & stored procedures; Talend job orchestration with Data Engineering.• Gathering business requirements and explaining data/BI concepts to teams.• Conducting Power BI training sessions and deploying a Self-BI offering.• Power BI technical referent: best practices, complex incident resolution, and technology watch.• Governance and security: Workspace, role management, RLS, applications, and datasets.
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Education
- Master 2 Consultants & Socio-Economic ResearchersParis Diderot University2018Master 2 Consultants & Chargés d'Études Socio‑Économiques
Certifications
- Microsoft Certified: Data Analyst Associate - Power BIMicrosoft2022
- Data Analyst Competency CertificateConservatoire national des arts et métiers2021