sap pa , Interfaces, Sap Webdynpro Abap, Sap Fiori, Sap Abap, Reports, Forms, Reports, SAP ESS MSS Portal screens, SAP webIDE Gateway integration, development of custom apps using UI5, NWDI, Eclipse Web IDE, SAPUI5 development, customizing ESS MSS business packages, Fiori apps customization, Compensation modules, NWDS, launchpad configuration, OM