We pollute the man’s topic, but the subject is worth discussing.
You work 15 years in Romania, 5 in France, 5 in UK, 10 in Germany. At 25, the subject of retirement seems like crap, but at one point it becomes a priority. What are you doing? How are the years worked in the UK be taken into account in a no-deal Brexit?
I studied and worked a bit in Germany before entering the EU. I had no problems with the visa, but it was not very simple either. When you’ll get back to that situation, you’ll realize that “no problem” means “problems”.
When you have the same opportunities in so many European states, I say that it is foolish to go to work in a country where 1 out of 2 locals are staring at you. Or, at least, wait until November.