Mykola Rad built and enhanced backend utilities for the iNeutronn/Railways repository, focusing on robust configuration management and movement calculation features. He developed an Entrance Location Generator in Java and Spring, enabling validated generation and retrieval of map entrance locations with flexible dimension handling. Mykola also introduced a Client Movement Calculation Helper, which computes movement time and distance based on configurable client speed and coordinates, improving reliability for client interactions. To further strengthen the codebase, he refactored configuration model setters to defensively handle null or invalid inputs, reducing runtime errors and ensuring safer configuration loading throughout the application’s backend systems.