I am a data analyst with a passion for uncovering hidden patterns and turning data into valuable insights. In my portfolio, you will find projects where I use analytical tools and visualizations to support business decisions.

Marta KowalczykMarta KowalczykData Analyst
AlzheimerSALARY ANALYSISCOFFEE SHOPPolice ShootingsrEAL STATE LISTINGSAlzheimer disease analysisHR Salary Analysis in a CompanySALES ANALYSISPolice Shootings USA 2015-2021Madrid Apartment Pricesbike storeSales ANALYSISPOWERBISQLPOWERBIPOWERBIPOWERBIPOWERBIPOWERBIPYTHONPYTHONPYTHONSQLSQL

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ProjectsAP PROJECTS
Check of wrongly used whtCHECK OF DUPLICATED BOOKINGSAP ACCOUNTINGAP ACCOUNTINGPYTHONProjectsAP PROJECTSEXCELEXCEL

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PythonStatisticsData VisualizationLanguagesSQLAutomationEDA with Pandas, Numpy, Matplotlib, Seaborn.Strong understanding of descriptive and inferential statistics.Visualization in Power BI, Python and Excel.Advanced Spanish & English, Native PolishProficiency in writing SQL queries for data
manipulation and extraction.

I’m a data enthusiast with a passion for uncovering insights that can help improve decision-making and processes. With experience in SQL, Excel, Power BI, and Python, I enjoy analyzing data and turning it into clear, actionable information. My goal is to use my skills to support businesses in making more informed choices.

Throughout my projects, I’ve worked on a variety of analyses, including sales trends, real estate pricing, and operational optimizations. I’m always eager to learn new techniques and tools to enhance my skills and expand my knowledge, especially in areas like data science and machine learning.

I look forward to continuing to grow as a data analyst and contributing to projects that help organizations make data-driven decisions.

Hands-on experience automating accounts payable processes.Marta Kowalczyk