Developed an Airplane Data Management API for the informacioni-sistem-za-aviokompanije repository, focusing on establishing a scalable foundation for airplane fleet operations. The work centered on implementing CRUD operations for airplane records using Express.js and Node.js, with REST API principles guiding the design. New routes and a dedicated controller were introduced, then integrated into the main server index to streamline access and reduce integration friction for future features. The technical approach emphasized modularity and traceability, as evidenced by detailed commit documentation. This initial feature set enabled unified and maintainable data handling, setting the stage for expanded fleet management capabilities going forward.