"..there are almost no genuine software development companies in Europe. Software jobs there are mostly internal (enterprise) software development or customization, and not software product or service development."
So my career for the past 14 years has been a dream? Of course there are software product companies in Europe.
I can name any number of them for example in the really small (population wise) Helsinki area. Just to name a small subset: Supercell, Rovio, Remedy Games, Napa (ship design), Rightware (automotive UI:s), Basemark (AI and mobile graphics), F-Secure, Aiven...
Then there are hardware businesses that are deeply linked with software. Nokia (Networks, not phones...) being the most prominent of them, but new comers as well - IQM (Quantum computers), Varjo (VR headsets), Iceye (satellites)...
Then there are the subsidiaries of global companies developing software - NVidia, Trimble, Huawei (handsets), Amazon (robotics), QT, Electronic Arts, Unity...
This is not an exhaustive list but just a small subset out of the cuff. If I can name this bunch just from my local capital area in Finland I can only extrapolate that the Zoo of software companies in Europe is, in fact, quite large.
There are just not any Google of Facebook scale unicorns (except local subsidiaries of them course).