I don't know about those places in particular, but it's quite common (especially in Europe) to see people described as "postdoctoral researcher" or "postdoc res

I don't know about those places in particular, but it's quite common (especially in Europe) to see people described as "postdoctoral researcher" or "postdoc research associate" on their staff pages, website, email sig etc, while in the official HR scheme and on payroll those titles only exist without the word "postdoctoral".