What is the salary and cost of living for a frontend/java programmer in Poland?

Question

Career in IT

Greetings.
I plan to move to Poland next year. I want to combine my studies with work.
The purpose of moving is only one, to gain experience.
I’m wondering if I can pay for my studies and life on my salary?
And is it really possible to get a job while studying at the university?
By experience, in my city I worked as a frontend developer.
I know a lot of modern technologies. I know that there is a "trend" today, relevant and in demand.
I also know PHP, MySql, Python, a little Java.
Is it possible to find a job with this knowledge?
As a frontend developer, I mean knowledge of HTML/CSS, JS, various libraries, jQuery example, and various frameworks, Angular 2 example.