Nikolaos Gallis

I help companies turn complex data into clear, decision-ready insights through scalable Power BI and Microsoft Fabric solutions. Whether you need executive dashboards, robust semantic models, or automated data pipelines, I deliver end-to-end BI solutions that are reliable, performant, and built for real business use.

With 5+ years of experience across pharmaceutical, consulting, and IT environments, I specialize in designing enterprise-grade data models, optimizing reporting performance, and standardizing analytics across organizations. I’ve led Power BI initiatives, built unified reporting frameworks, and automated ETL pipelines using tools like Fabric, PySpark, SQL, and Dataiku.

What sets me apart is my ability to bridge the gap between business and technology—I don’t just build dashboards, I ensure they answer the right questions and drive action. My background in Economics and teaching also helps me communicate complex concepts clearly to both technical and non-technical stakeholders.

Typical projects I handle:

End-to-end Power BI dashboard development (from raw data to insights)

Microsoft Fabric implementations (Lakehouse, pipelines, semantic models)

Data modeling & DAX optimization for performance and scalability

ETL/ELT pipeline automation (PySpark, Dataiku, SQL)

Reporting standardization & governance frameworks

If you’re looking for a BI partner who combines technical depth with business understanding, I can help you build data solutions that actually get used.