Natalia Kowalewska
Business data analyst
Warsaw, hybrid work · +48 123 456 789 · natalia.kowalewska@example.com · linkedin.com/in/nataliakowalewska
Professional profile
Data analyst with 4 years of experience at a retail chain. I build data models and dashboards in Power BI, write SQL queries and automate reports. My pricing and range analyses helped raise the margin in selected categories by 2 percentage points.
Work experience
Data analyst
01.2022 - presentRetail chain, 300 shops, Warsaw
- Sales and margin dashboards in Power BI for 40 category and regional managers.
- SQL queries on data warehouse data, over 200 million transaction rows.
- Pricing and range analysis; margin in 5 categories up 2 percentage points.
- Automating weekly reports, saving about 10 hours of work a week.
- Presenting findings to the board and category managers.
Junior sales analyst
06.2020 - 12.2021Cosmetics distributor, Warsaw
- Sales reports in Excel for the sales department.
- Checking data quality and cleaning up the customer database.
- Analysing promotion effectiveness.
Education
Quantitative methods in economics, master's degree
2015 - 2020SGH Warsaw School of Economics
Skills
- SQL
- Power BI and DAX
- Advanced Excel, Power Query
- Python: pandas
- Data modelling
- Presenting findings
Certificates
- Microsoft Certified: Power BI Data Analyst Associate, 2023
- Python for data analysis course, 2022
Languages
- English: C1
Additional information
- Portfolio of dashboards on public data, link in my profile
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