Some development for our ZOHO CRM system

We are used to work with Zoho CRM for over 2 years. Now we want to implement a new Zoho CRM system (new blanco lincence) to get rit of our old bugs and the issuses that we learned over the last 2 years. The different modules are already set up, layouts are OK, but we have some issues with the connextions between custome modules and the standard modules. We are looking for a expirienced developer of Zoho, to help us with these issues.

kind regards, Arnaud de Clippele