Jakub Kowalewski expanded hardware support for the Zephyr bootloader by adding ctcc/nrf52840 and ctcc/nrf9161 board targets to the zephyrproject-rtos/mcuboot repository. He developed per-board configuration files and enabled MCUboot serial configurations, improving boot diagnostics and reliability for these platforms. By disabling verbose logging, Jakub optimized boot times, addressing performance needs for embedded systems. His work leveraged C programming and deep knowledge of bootloaders, hardware configuration, and RTOS environments. The changes broadened MCUboot compatibility, supporting Zephyr’s goal of diverse hardware integration. Jakub’s focused engineering delivered a well-scoped feature, demonstrating technical depth in embedded system bootloader development.