Proceedings of the 3rd International Conference on Software Technology and Engineering (ICSTE 2011) held in Kuala Lumpur, Malaysia, August 12–13, 2011. Co-sponsored by University Putra, Malaysia, Polytechnic University, Puerto Rico, Chengdu Young Education & Consultancy, and IACSIT. The primary objective of ICSTE 2011 is to provide a platform for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Software Technology and Engineering. This conference provides opportunities for delegates to exchange new ideas and application experiences face to face, to establish business or research relationships and to find global partners for future collaboration.