Bilsen - Bilkent Software Engineering - is the software engineering group at the Bilkent University in Ankara, Turkey. The group is founded in October 2008 and is located in the faculty of engineering, department of computer engineering. 

The main goal of the group is to foster research and education on software engineering and support ongoing activities in these directions.

The research activities of the group are in different domains of software engineering including separation of concerns, software architecture design, object-oriented software development, model-driven software development and software product line engineering.