Worked on the powsybl-open-loadflow repository to address a targeted bug affecting AC-DC generator target power updates, focusing on improving the accuracy and reliability of load-flow simulations in hybrid AC-DC networks. Applied Java and backend development skills to implement robust listener management, ensuring proper lifecycle handling and preventing stale events during network model updates. Emphasized unit testing to maintain code quality and reduce regression risk. The solution enhanced the precision of network modeling used in planning and operations, supporting more dependable simulations and decision-making. Maintained clear commit messaging and traceability to facilitate downstream review and ongoing project maintainability.