Having studied in the Netherlands it was somewhat difficult finding a job (10 years ago), and my first job was in Poland at a large Pharma company. I started working there for a wage lower than Dutch minimum wage when I started, just to get an in into the industry.
There is a while set of jobs in Pharma that got moved to Warsaw and no longer available in NL/DE.
There's a large set of jobs in everything that expanded operations in Poland, for salary reasons, e.g. automotive (Stellantis, Volkswagen, MAN) electronics (Electrolux, Whirlpool), food (Ferrero)...
But Poland did well capturing them and then growing new businesses locally, so now there's local brands and such that are expanding abroad on their own.