In order to be able to cover your financial costs for your studies its always good to find some extra job while you study.
Here I would like to recommend to you a recruiting agency that works especially with recruiting students for part time or full time jobs.
Most probably if you live in Sweden you have heard about it, its called Akademic Work and this is their web page: http://www.academicwork.se/
Firstly I would recommend that you create a CV profile on their web page to be able to mach jobs with your profile, once you do this you will start getting job offers via email and then with your already created profile its very easy to apply for them.
If you study at the IT faculty you can catch them on Monday the 28th in the campus Lindholmen, Patricia building around 10h where they will have an info table and tell you more about how they work and how you can look for jobs trough them.