Stefania Siorek

Stefania Siorek is a skilled database engineer currently employed at Visa since April 2025. Prior experience includes a role as a data engineer at Palturai from July 2022 to March 2025, where responsibilities involved data quality monitoring, multidimensional data analysis, time series evaluation, and the implementation of data processing algorithms. Stefania also served as a junior data engineer, focusing on creating scoring models and improving data analysis methodologies. Prior to Palturai, Stefania worked as a data publishing specialist at Franklin Templeton and completed an internship in the Client Data Exchange Team. Earlier roles include teaching Japanese at Leader School Mosina and an internship at Sapporo Park Hotel. Academic qualifications include a Master’s Degree in Data Science and two Master’s Degrees in Japanese Studies from Uniwersytet im. Adama Mickiewicza w Poznaniu.