Pawel Pelikan focused on kernel timing reliability in the zephyrproject-rtos/zephyr-testing repository, addressing a critical bug affecting sleep duration accuracy on the NRF54H20 PPR core. He improved deterministic sleep behavior by adjusting the maximum shortest ticks calculation in usleep.c, specifically for configurations where CONFIG_SOC_NRF54H20_CPUPPR is defined and the system clock tick rate is high. Using C and leveraging his expertise in embedded systems and RTOS, Pawel updated test coverage to validate these changes under hardware-specific scenarios. His work enhanced power budgeting and performance for timing-critical applications, demonstrating depth in low-level kernel development and hardware-aware problem solving.