I need a MSSQL database sync application which will run on central server IIS

I am looking for a programmer to create a MSSQL database sync application which will run on a central IIS server hosted on a Windows Server. This application will be set to automatically perform a real-time database sync so that the data is always up to date. The application should be reliable, efficient and secure. The programmer needs to be experienced in developing applications for Windows Servers with knowledge of MSSQL databases. Any other suggestions that could help improve the performance and security of the application are welcome.

Database structure for all sub centers are same.