Marcin Filipiak developed two user-facing features for the marcin-filipiak/test_wspolpracy repository, focusing on enhancing data reliability and user interaction. He implemented a push confirmation feature, integrating new UI assets to streamline user actions and ensure confirmation flows are clear and robust. Additionally, he expanded the zbiorczy.md dataset by adding a new data entry row, improving the scope and accuracy of reporting and analytics. His work demonstrated disciplined version control, clean commit practices, and effective cross-functional collaboration. Utilizing Markdown for documentation and UI/UX asset management, Marcin delivered targeted improvements that aligned closely with evolving product and data requirements.