Denys L.

Data Analyst | SQL, Python & Data Visualization

I help businesses turn messy data into clear, actionable insights using Python, SQL, and Excel/Tableau. What I can do for you: - Clean, transform, and structure raw datasets (SQL, Pandas) - Build dashboards and reports (Excel, Tableau, Power BI) - Write Python scripts to automate repetitive data tasks - Perform exploratory data analysis to surface trends and patterns Recent work includes a COVID-19 data analysis project (SQL: CTEs, window functions, temp tables) with an accompanying Tableau dashboard, a data cleaning pipeline for a real estate dataset, and a dynamic Excel sales performance dashboard built with pivot tables and interactive charts. I'm also expanding into ETL workflows and foundational AI/ML concepts as I continue to grow my analytical toolkit. I have hands-on experience with SQL and Python from a support engineering role, and previously worked as a QA Engineer — so I bring strong attention to detail and a habit of double-checking results, not just producing them. Regular communication is important to me, so I'll keep you updated throughout the project and flag anything unclear early rather than guessing. Let's talk about your data — I respond quickly and deliver clean, well-documented results.