Worked on the nrfconnect/sdk-nrf repository to improve build reliability for NFC sample applications in embedded systems. Addressed a recurring issue where build outcomes varied across different board security states by disabling the partition manager within Kconfig.sysbuild. This change eliminated intermittent build failures and reduced CI flakiness, resulting in more predictable and stable integration cycles. Demonstrated proficiency in build configuration and Kconfig, applying standard code-sign-off practices to ensure maintainability and traceability. The work focused on hardening the build system rather than adding new features, directly supporting developer confidence and accelerating the integration of NFC samples across diverse hardware environments.