Generally speaking, it can be very difficult to find a job in a country where you don't speak the language. As a practical matter, it rules out any smaller company. Some large international companies use English as their "company language" and may not require the local language, though that applies mostly to the more mobile executive types.

Still, a year of conscientious work in your Spanish classes should give you some foundation and a shot at being conversational. When you start job hunting, look for companies that have some need for international skills - companies that import and export (or want to), or with headquarters in English-speaking (or Polish speaking) countries. Whatever gives you a foot in the door!