I think I already found it, it's about 3.5mm long, bright green abdomen with green legs and a brown head, it looks like a Green Meshspider(Nigma Walckenaeri). I just wasn't sure because most descriptions of this have more yellow-ish legs, these are green all the way until the legs are too thin to really show visible color.
For the one I proposed, yellowish green is also possible. The one in your link seems to have a hairy abdomen, which I don't see in your picture. Also it seems to be much darker greenly coloured. (Just my two cents, but I'm no expert)