Born in Girona. He studied Biology at the University of Barcelona, and Biochemistry at Edinburgh University, where he obtained a PhD in 1992 with the help of a fellowship from La Caixa/British Council. He then joined the Biology department of the Massachusetts Institute of Technology as a postdoc. In 1997 he moved to The Scripps Research Institute where he became assistant professor of Molecular Biology in 2001. In 2003 he joined ICREA, and became Principal Investigator at the Institute for Research in Biomedicine, where he heads the Laboratory of Gene Translation. He is the founder of two biotechnology companies and currently serves as Chief Scientific Officer of Omnia Molecular SL. Omnia Molecular is an antiinfectives discovery company located at the Barcelona Science Park. In addition, Dr. Ribas serves as a scientific advisor to aTyr Ltd.