Are there any good University to study Masters in Biotechnology?
As a clinical research biologist with a PhD and an MD myself, I highly recommend that you get a degree in biomedical ENGINEERING instead of biotechnology. I deeply regret that I didn't, and kick myself very single day. It is much more salable on the job market, and the wages are much higher, as is your lifetime savings potential.
Unfortunately, Poland is not the place to do this. Find a good engineering school in the US, the UK, Germany, Sweden or Denmark. UC San Diego has an excellent program (shameless plug by alumnus).
Until then, it might be worth your while to take a year off to beef up, 16 hours a day, every day, your math skills (Calc, trig, geometry, analytical geometry, linear algebra, differential equations, multivariable calc, basic probability and statistics for biologists, advanced probability and statistics for engineers, and formal logic. Also, take at least a basic course in programming and computer science, and review your physics (with calculus), cell bio, molecular bio, biochemistry and genetics. If you can fit in thermodynamics (with differential equations) and heat & mass transfer, so much the better.
Your first year of grad school is going to be brutal enough as it is without worrying about catching up on math. It will take all you have to keep up even if you are well prepared, and God forbid if you fall behind; you will never be able to catch up.
Why not Poland? There is precious little bioengineering R&D done in the country, so universities do not have abundant agreements with private companies like in the States. This greatly hampers your ability to network, to get good and interesting paid internships and fellowships. Also, the instruction is long on (outmoded) theory, and very short on practical courses, and what little there is is with equipment that belongs in a museum, and is jealously guarded by professors.
Actually, during your year off, you can come up with a research project that somehow involves fermentation (in the very broadest sense of the word, not necessarily beer), and apply for a fellowship from the Carlsberg foundation to study in Denmark. The fellowship is very generous, and laboratories are equipped with the best cutting edge instrumentation that no lab in Poland will see before you retire at a ripe old age. I also studied in Denmark with a Carlsberg fellowship, and have to say that I was given the royal treatment. The year I studied, I was the only person to apply for the grant.
Another reason is that even though tuition in Poland may seem low, it may turn out to be more expensive to study in Poland because there is little in the way of financial aid available in Poland, and it is exceedingly unlikely that you will be able to find any work as a foreign student.
Also, like monitor said, jobs in biotechnology in Poland are scarce as hens' teeth. It is exceedingly unlikely that you will be able to pursue a career in Poland in this field. Again, because of the lack of R&D dollars.