posted about 1 week ago
I had a postdoc in Belgium. You will find pay/conditions a bad shock after Switzerland. the system is very much about personal contacts so suggest networking via seminar series etc asap. There is one major funding scheme through which you apply for individual fellowships to be held at a host uni - the FNRS
https://www.frs-fnrs.be/fr/ - some info is in English. Most others work a stream of very p/t teaching jobs at different universities even 0.1 FT ones - if you don't speak French/flemish you are limited there but check Vesalius College in Brussels also College of Europe and united Nations university where things are done more in English. It will though be quite hard to break into the Belgian university system.
The good news though is if you are open to non university jobs there are many think tanks and organisations in Brussels to work for.