Lazaros Perperidis

Business Intelligence (BI) Engineer at Front Row

Built and maintained 20+ Power BI dashboards for clients and internal stakeholders focused on marketing analytics. Automated data ingestion and transformation using scheduled SQL queries in GBQ, Power Query, and Funnel.io API integrations. Utilized advanced SQL (CTEs, Window Functions) for analytical modeling, data transformation, and building efficient reusable query logic. Improved Power BI report performance by up to 80% through optimized data models, query folding, incremental refresh and native SQL integration. Served as the main BI contact for stakeholder requests, translating business needs into actionable data solutions and ensuring ongoing support.