Khaled Belhaj

Khaled Belhaj

Senior Power BI Developer
Tunisia
English, Arabic, French
Freelance Hybrid

نبذة عني

Senior Power BI developer with 7+ years specializing in Power BI and 20+ years in IT and databases. Strong in DAX, Power Query, SSAS tabular and dimensional modeling (star schema), row-level security and performance opti…

الخبرة

Power BI Consultant & Trainer (Contract)

World Bank Group · Ariana , Ariana , Tunisia
Dec 2025 - حتى الآن · 11 أشهر

<p>Trained 120 civil servants in Power BI across 6 groups of 20 participants.</p><p> L4R program: 4 groups from 7 Tunisian ministries, starting with a pilot ministry and including a mixed group of senior officials.</p><p> Public procurement control body (CGDP): 2 groups trained on dashboard management and data workflows.</p><p> Enabled participants to independently maintain and update their dashboards after the sessions.</p>

Independent Power BI Consultant & Trainer

Gold Report · Tunis, Tunisia
Aug 2025 - حتى الآن · 1 سنة 3 أشهر

<p>UTIC Group: developing and industrializing the group's annual Power BI report, unifying financial and operational data from the subsidiaries.</p><p> MEGA (medical products): designing decision dashboards to track sales, supply chain and commercial performance indicators.</p><p> Used generative AI to accelerate the development of the UTIC and MEGA projects.</p><p> Delivering Power BI and AI training (AI for data analysis and decision-making), advanced Excel and Microsoft certification preparation (PL-300, DP-600).</p>

Power BI Consultant – Migration and Data Governance (Mission)

Numeryx Tunisia · Tunis
Sep 2025 - Dec 2025 · 2 أشهر

<p>Migrated 12 enterprise reports from Tableau to Power BI Service in 4 months for 20 business users, reducing response time by 40%.</p><p> Built a new business semantic model and industrialized the reporting pipeline with CI/CD.</p><p> Designed operational and strategic dashboards and scorecards for the Network, Commercial and Finance departments.</p><p> Implemented data governance, data quality controls and Row-Level Security (RLS) best practices.</p>

BI Project Manager

VEO Worldwide Services · Tunis, Tunisia
Sep 2024 - Sep 2025 · 1 سنة

<p>Led a team of 6 across 3 strategic projects in 3 countries (France, Romania, Tunisia): a BI project for management control, SAP, and IT infrastructure / gateway security.</p><p> Led the design of the strategic data warehouse using Talend and PostgreSQL.</p><p> Planned, prioritized and allocated resources using Agile and Waterfall methods, tracking milestones and KPIs.</p><p> Aligned business units and technical teams through stakeholder and change management.</p>

Senior Business Intelligence Consultant

Amaris Consulting · Tunis, Tunisia
Jun 2023 - Sep 2024 · 1 سنة 3 أشهر

<p>Designed 30+ optimized Power BI reports and executive dashboards, reducing latency by 25%.</p><p> Delivered the strategic Power BI report for Bouygues Telecom executive management covering Finance, Stock and Supply Chain (France).</p><p> Automated ETL pipelines with SSIS and SQL, reducing manual errors by 75%.</p><p> Led a Microsoft Fabric proof of concept based on Lakehouse and medallion architecture.</p><p> Managed projects end to end, coordinating international teams and training client staff.</p>

Power BI Data Analyst

ADP · Tunis, Tunisia
May 2022 - Feb 2023 · 9 أشهر

<p>Automated 15+ Finance and HR Power BI dashboards, reducing manual effort by 40%.</p><p> Built a unified Power BI report consolidating payroll data for 50+ ADP clients.</p><p> Improved data accuracy by 30% and cut reporting time by 50% through VBA automation.</p><p> Trained functional and junior analysts in Power BI to make them autonomous in reporting.</p>

Power BI Developer (Contract)

Sentinel Data · Ariana, Tunisia
Sep 2021 - Jan 2022 · 4 أشهر

<p>Built a dynamic national and regional sales report in Power BI, covering source integration, ETL modeling and KPI calculation.</p>

Data Reporting Analyst

Ferro Import Export · West Africa
Feb 2019 - Aug 2021 · 2 سنوات 6 أشهر

<p>Developed Power BI dashboards tracking key commercial and financial KPIs for real-time performance monitoring.</p><p> Produced monthly and annual reports on the company's commercial and financial position in Africa.</p><p> Analyzed US and Canadian market data to support strategic decisions.</p>

Founder and Manager

INFOTECH · Tunis
Dec 2005 - Jan 2019 · 13 سنوات 1 شهر

<p>Ran the company.</p><p> Designed SQL Server databases and reporting solutions for corporate clients.</p><p> Led software deployment projects.</p><p> Delivered Excel, VBA, CRM and ERP training.</p>

المشاريع

Tableau to Power BI Migration - Ooredoo Tunisia

Ooredoo
المدة : 01-Sep-2025 - 31-Dec-2025

<p>Mission via Numeryx Tunisia at Ooredoo Tunisia. Migrated 12 enterprise reports from Tableau to Power BI Service in 4 months for 20 business users, reducing response time by 40%. Designed a new business semantic model and industrialized the reporting chain with CI/CD. Built operational and strategic dashboards and scorecards for Network, Sales and Finance departments. Implemented data governance, quality controls and Row-Level Security (RLS) best practices.</p>

المهارات

Power BI Desktop Power BI Service DAX Power Query (M) semantic models dimensional modeling Row-Level Security (RLS) Tabular Editor DAX Studio performance optimization data modeling star schema ETL/ELT SQL SSIS SSAS Talend Power Automate Python PowerShell VBA CI/CD for BI SQL Server Oracle PostgreSQL data warehousing Tableau advanced Excel Power BI Embedded Paginated Reports Master Data Management data governance data quality KPI frameworks scorecards data storytelling Agile Waterfall JIRA Confluence SharePoint stakeholder management change management Microsoft Fabric Lakehouse medallion architecture Azure Data Factory Azure SQL Database Azure administration instructional design
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