psy, epsylon


He was born in Bilbao (Basque Country) on 1982. His main interests are web programming, networking and setting up servers. He owns He is the founder of a computer security company called BlindSec in Spain. He is currently working as a security pentesting consultant ("black box") on a security company of Madrid (Spain), and is teaching web programming.


Works and lives in Amsterdam (Netherlands) since 2010.

The developer of XSSer a.k.a Cross Site Scripter which is an automatic framework for pentesting XSS attacks against different applications.