Worked on the apache/nuttx repository to deliver a key feature enabling 64-bit simulation builds, focusing on improving cross-architecture reliability and build stability. Addressed 64-bit pointer handling by casting return values to uintptr_t before converting to void pointers, ensuring correct memory management in C. Updated simulation configurations by removing 32-bit build flags from defconfig files, facilitating a smooth transition to 64-bit compilation. Demonstrated expertise in build systems, embedded systems, and C programming while maintaining disciplined version control practices. The work reduced potential runtime issues on 64-bit targets and contributed to more maintainable, robust simulation environments for embedded development workflows.