The 12th International Joint Conference on Computer Science and Software Engineering (JCSSE 2015) is organized by Faculty of Engineering and Faculty of Science at Prince of Songkla University, HatYai Campus, Thailand. The conference presents every possibility on new research based on computer science and software engineering. Prospective authors are invited to submit papers reflecting original, unpublished work in these fields. Papers should not exceed 6 pages including results, figures and references. Manuscript templates will be made available on the website. All submissions will be subjected to a double-blind review procedure. The proceedings of accepted papers will be made available at the conference. Best paper awards will be given to outstanding contributions and recognized as such at the conference. Only electronic submissions with PDF/MS Word files will be accepted via the conference website. At least ONE author of an accepted paper needs to register for the conference.