During February 2025, J focused on backend reliability by addressing a core hashing issue in the ThioJoe/_TempFork_PowerShell repository. He refactored the GetHashCode method for PSMethodInvocationConstraints, ensuring correct hash code generation for array members and improving the stability of hash-based collections such as dictionaries and HashSet. Working primarily in C#, J applied strong debugging and code quality practices to resolve a bug that previously risked runtime errors in PowerShell code. This targeted fix enhanced maintainability and traceability, demonstrating depth in backend development and a disciplined approach to issue tracking, even within a short engagement period and a focused technical scope.