How to find grant opportunities for academic position?
Since you are in Europe, EURAXESS (which belongs to the European Commission) may be a suitable platform to you. National funders from the EU (and beyond) regularly list their calls there.
There may also be national databases of research grants (provided by official bodies). For instance, as regards Germany, the DAAD offers this Scholarship Database, while Austria offers a comprehensive and always up-to-date list at grants.at.
The analogy for the U.S. seems to be grants.gov.