Can we get highly paid jobs there?
Basically, no. If it's money you are after, then Poland just isn't the right place for you.
Earnings and savings potential are much, much lower than in the richer countries of western Europe like Germany, Switzerland and Norway, in the English-speaking countries (US, Canada, UK, Ireland, Australia and New Zealand), and jobs for civil engineers are hard to find. Also, the high cost of living relative to wages makes saving up a significant amount of money much more difficult that in richer countries, and the quality of life is considerably lower. Concentrate on finding a job in those countries.
What ever you do, do not come to Poland unless you BOTH already have found high-paying jobs BEFORE you come. It would be foolish to do otherwise. In fact, there is little, if any, point wasting your time even thinking about Poland at all.
For both of you, I would recommend going either where R&D dollars are concentrated (for you), or where there are extremely advanced construction megaprojects with mega budgets (for him). Follow the money. That's where the interesting, rewarding and high-paying jobs are.