We need a developer or a team of developers for creating a BizTalk application and extend Joomla with an API.
The three involved systems are:
1. Website with joomla and virtuemart --> users are registering themselves on the joomla website.
2. CRM System (easysy/bexio) --> has a fully documented REST API for external access to all CRM data
3. The BizTalk Server for orchestring, manage and auditing the process.
If a user registers himself on the web, the Biz Talk server should search this user in the CRM and compares the data entered. Depending on the compare result, some fields in the CRM needs to be updated and the user has to be activated in joomla.