Jobroller - Careerjet integration for all countries and job types?


I would like to set up a new website, using Jobroller/Careerjet add-on. (Because my present site does not count the commission for some reason, despite there is a Careerjet API integrated in)

How to configure the integration, if I want to have a worldwide jobsite? (Results from all countries, and for all job types) Regarding to the following settings especially (the path)

Country (how to show from all?)
Job Listings Queries (what to type here?)
Job Types Mapping (and here?)

An extra headache: it always shows the default country (one must to choose from the drop down menu) even for a city in a different country...

Is there anyone around who is an expert in jobsites and API integrations? Thanks