Jaan Tallinn, Estonian computer programmer, co-developed Skype
Jaan Tallinn (born 14 February 1972) is an Estonian computer programmer and investor known for his participation in the development of Skype and file-sharing application FastTrack/Kazaa. Jaan Tallinn is a leading figure in the field of existential risk, having co-founded both the Centre for the Study of Existential Risk (CSER), and the Future of Life Institute.