Building Systems Software Engineering competency is accessible because you already have C++ (> 50% both roles), C (> 35% Systems Software, > 50% Embedded prevalence), low-level programming expertise, memory management, performance optimization, and systems thinking. Your understanding of computer architecture, hardware constraints, and real-time concerns transfers directly. Python appears in > 25% both roles for tooling, and Git is essential to both. The main new skills are operating systems, kernel development, virtualization (KVM), and networking protocols (TLS, HTTP), but your experience with hardware interfaces and real-time operating systems makes learning OS-level development more intuitive—you're shifting between hardware-level and OS-level development while maintaining low-level programming mastery.