For example here [1] you can see some reliable statistics for France, see page 2 (it's in French but the plots are easy to understand). The median salary (annual before taxes) when starting is 35k€, and roughly increases by 1800€/year. So it only reaches 40k€ after 3 years. It reaches 50k€ after 8 years only.
Also all engineers have Masters in continental Europe. You can't be an engineer without one. It's nothing special.
[1] https://www.iesf.fr/offres/doc_inline_src/752/IESF_Synthese_...