Istvan Rozsa
a data enthusiast based in Prague, Czech Republic. I help businesses of all sizes turn their data into powerful insights by designing and building data warehouses.
Got a project in mind or just want to geek out about data? Let's have a virtual coffee and chat. ☕
My focus
ETL Pipelines
Design and development of robust, automated data pipelines that clean, transform, and move your data where it needs to go.
Data Warehousing
Scalable, secure, and well-structured data warehouses — built to grow with your business and support real-time insights.
BI Solutions
From dashboards to deep-dive reports, I help teams visualize and understand their data to make smarter, faster decisions.
Experiences
✅ Designed and deployed scalable ETL pipelines
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🏗️ Built and maintained modern data warehouses
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📊 Developed end-to-end BI solutions
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🔍 Collaborated with cross-functional teams
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🌍 Worked with companies across multiple industries and sizes
✅ Designed and deployed scalable ETL pipelines • 🏗️ Built and maintained modern data warehouses • 📊 Developed end-to-end BI solutions • 🔍 Collaborated with cross-functional teams • 🌍 Worked with companies across multiple industries and sizes
Fine Words from Great People
Sometimes, their words introduce me better than I ever could.
“Istvan took our messy data and turned it into a powerful BI system we rely on daily. He’s not just technically sharp — he also really gets what business users need.”
“Professional, proactive, and always ready with a better solution. Our data infrastructure is on a completely different level now thanks to Istvan’s work.”
“Working with Istvan was a game changer. He built a clean, efficient data pipeline that saved our team hours every week — and made our dashboards finally make sense!”