how to link 2 different categories together

hello .. my 1st post
straight to the point

is there any way to link 2 "sub categories" e.g. (my case)
Countries with sub cat.(uk, usa, canada, +20 other)
and
Jobs with sub cat. (developer, coder, designer, +20)
so when you are inside uk you could reach one or two job cats. located in uk only (coder and designer jobs in uk)

and on the other hand if you looking for coder jobs regardless the location (selecting all countries with coder job)

or (coder and designer in usa and canada)

the only solution i could think of is to root both categories
countries and jobs will be a nice big unorganized list on root

also i activated categories field in search (with tag-like selector "multi") but it only points to the subcategories inside my current location (countries: viewing only 20+ countries)
* if i could select 1 or 2 country and also 3 or 4 jobs type from inside (countries and jobs categories) and get those linked data displayed as a result, that's would be great

the other solution is to create repeatedly the 20+ jobs type inside 20+ countries !!! 400 categories instead of 40

or maybe i miss something there

i didn't think use 2 category is a good idea ...
1 type is content and country is field, job is field etc
avantage 1 category, all field are fieltered no need to create category and sub too much just add value in field ...

Hello

you can create a menu item that lists items from these 2 categories