During January 2025, this developer modularized the build system for the containers/qm repository by extracting KVM-specific build logic from the main Makefile into a dedicated Makefile under subsystems/kvm. Using Makefile and build systems expertise, they decoupled KVM’s build process, enabling isolated subsystem builds and simplifying ongoing maintenance. This refactor reduced cross-subsystem dependencies and established a foundation for consistent build practices across future subsystems. Although no bugs were fixed during this period, the work improved maintainability and positioned the project for faster iteration and automation. The technical depth demonstrated a strong understanding of scalable build system architecture and modular design.