Worked on enhancing the certification workflow in the Evolveum/midpoint repository by implementing deadline enforcement for certification decisions, ensuring that submissions after stage deadlines are systematically prevented. This feature was developed using Java and backend development skills, focusing on process integrity and compliance. Additionally, contributed to the Evolveum/midpoint-localization repository by introducing user-friendly error messaging when deadlines are exceeded, improving clarity and user experience during error handling. The work involved cross-repository collaboration to align workflow and localization modules, reducing compliance risk and providing clearer guidance to users. Demonstrated a methodical approach to backend software engineering and error management within a regulated process.