Nicolás González-Deleito joined the Software Engineering Group of Sirris in September 2007. He is mainly working on the VariBru project. This project researches the topic of product variability in software product development, and aims to help software intensive product builders in selecting and executing an appropriate variability approach. Before joining Sirris, he was a post-doctoral teaching assistant at the Université Libre de Bruxelles, where his research focused in cryptography and computer security, particularly in fair exchange protocols.