• Assisted in organizing data and created data dictionaries from past MMM (regression models) analysis projects, leading to an updated and more efficient database• Built a Python data pipeline to extract data from multiple xlsx files, calculate key performance metrics, and transform dataset into long format, providing the foundation for a team-developed prediction tool• Created data visualization using ggplot2 for exploratory data analysis which allowed for quicker data quality assessment

• Assisted in developing a data pipeline using PowerQuery, enabling more flexible and dynamic reporting through pivot tables.• Prepared and consolidated data for financial reports to ensure accuracy and provide key insights for decision-making• Tested a comprehensive controlling model for a group of interconnected companies developed in Excel using VBA, which helped identify and correct errors, improving the model's performance

Co-author of "Rowerzyści w Polsce 2021" (Cyclists in Poland 2021) reportDescription and analysis of survey data