Hi Bharat,
Please be sure to correctly distinguish which HANA product you are referring to. I assume it is the SAP HANA Cloud Platform, a development platform on which custom applications can be written. Custom applications can be written on the SAP HANA Cloud Platform for SuccessFactors Employee Central. Over time this will open up to other SuccessFactors applications.
Other related applications include SAP HANA Cloud Integration and the SAP HANA database. The former can be used to integrate SuccessFactors.
Best regards,
Luke