NIIAS is leading strategic industry development activities in intelligent trafficoperations control in Eastern Europe.-Developed a data handling module for a route calculation application servicing 20,000 trains across 120,000 km from the ground up, which allowed for a 97% accuracy (utilizing Ruby and SQL, later rewritten in Java)-Developed a user-friendly Excel-based pseudo-language and parsing service tailored for analytics professionals unfamiliar with SQL. It enabled them to perform semi-weekly data uploads and tests with a 3x increase in speed (utilizing Java, SQL and Ruby)-Created a REST API for integration with an interactive map of the whole railway system by providing accurate data for all available routes and trains at each station. The map allowed for a 2x cut down in route planning time-Improved application scalability, speed, and efficiency by modernizing a significant portion of legacy Ruby code to Java with Spring framework, resulting in a 35% reduction in RAM usage through the implementation of appropriate design patterns-Drastically improved application uptime from 75% to 99.99% through code optimization and the implementation of self-healing and self-resurrecting functionalities (Ruby)-Was responsible for onboarding of several junior developers-Worked daily with other developers, analysts, project managers. Participated in weekly meetings with upper management (department head)