Java, Express.Js, Oauth2, Npm, Devops, Fiori UI5, sap xsenv, CAP Node.js, SAP Build Apps, XSUAA, Calculation views, Git-based CI CD, Stored procedures, sap xssec, OData service design, SAP BTP Application Development, Role Collections, SAP Business Process Automation SBPA, JWT tokens, SAP HANA Cloud