Worked on reliability hardening for the esrlabs/openbsw repository, focusing on interrupt handling in real-time embedded systems. Addressed a race condition in S32K1 interrupt management by introducing compiler barriers through volatile inline assembly, ensuring that interrupt mask and unmask operations are not reordered by the compiler. This technical approach improved determinism and stability in interrupt service routines, reducing the risk of faults in critical code paths. The work leveraged skills in C, assembly language, and embedded systems, resulting in safer and more maintainable low-level code. The contribution centered on bug fixing, with an emphasis on robust interrupt handling and system reliability.