Work and Study at The Same Time 

Working part-time while studying can help you pay for your education.
As long as they are enrolled in an institution, international students have the right to work while studying in Poland. Students who are not citizens of EU member countries must have a valid residency permit as well. All students, including those who are visiting Poland for the first time, those who are in their first year of university, and those who are enrolled full-time in a language school, have the right to work.

During the school year, 20 hours of employment are allowed, as well as three months of full-time work during the vacations.
Residents with a Residence Card are allowed to work full-time.

Stay back and Work Permit after Study in Poland

After graduation, students from member nations of the European Union are free to work in Poland. It may be difficult to leave such a wonderful country once your studies are through. If you prefer to stay and work in Poland, don't worry. You do not require a work permit if you have completed a full-time program at a Polish higher education institution. Just make sure you have a valid stay permission. You can stay for another 2-3 years if you can show that you can sustain yourself financially without relying on government assistance. A Work Permit can be obtained by students who find work or accept work.

 Blue Card 

Once they've found a job, any professional can apply for a Blue card. This is valid for two years and then extended for another three years, and the person can work anywhere in the European Union in nations that participate in the Blue Card Scheme. You can apply for Permanent Residence after 5 years.