Maintenance and further development of a running application (Host-Legacy, PL/1, C)

In this mainframe application, business processes related to construction financing, real estate mortgage administration and amortization management are mapped. Such processes can be business transactions, general-purpose modules or batch programs, whereby the latter usually represent regularly running processing that must be monitored and corrected in the event of errors. The application itself consists of a large number of programs or modules in PL/1, C and JCL, a hierarchical and a relational database for data management as well as various additional components for the control and use of the application by the department or by the employees.