Worked on enhancing the stability and real-time performance of the RP2040-based Zephyr Hardware Abstraction Layer, specifically within the zephyrproject-rtos/hal_rpi_pico repository. Focused on embedded systems and RTOS development using C, the work addressed a critical section handling issue by ensuring that entry and exit functions are always inlined and executed from RAM. This technical approach prevented unintended placement in flash memory, which could compromise deterministic behavior under real-time workloads. By targeting this low-level bug, the developer improved both performance and predictability for time-sensitive operations, demonstrating a deep understanding of hardware constraints and real-time software requirements.