I think I've got it.

I just create a table on each server containing login information. With this table I will dynamically create my connection string for my packages that are all uploaded to one "master" server.

When creating a job on a server I will have to refer to the packages stored on the master server. Right?

But ...

I still have got some dataflow tasks. How does that behave? Is dataflow task data first transferred to the master server because the package is stored there? Or does my server just fetch the package from there?