Zeynep Su Selcuk focused on backend development for the NuRadioMC repository, addressing a critical bug related to timezone handling in the database reading component. She implemented timezone-aware time validation using Python, ensuring that time comparisons across different zones were accurate and that data reads respected the intended cutoff date. This fix prevented pre-cutoff data from being misclassified, thereby improving the reliability of time-series analytics and downstream reporting. Her work demonstrated a strong grasp of datetime comparisons and robust bug-fix workflows, contributing to greater data integrity within the system. The solution was delivered with clear traceability and technical precision.