Professional background
            Over the last 28 years I’ve worked as a grey, red and white-hat
            hacker.
            Between 1999 and 2007, as a grey-hat hacker, I performed some
            work in the areas of social engineering (for password cracking),
            backdoor design, logic bombs and SQL injection.
            From 2013 to 2017, as a red-hat hacker, I worked as a reverse
            code engineering specialist and developed JackTheStripper (JTS)—a
            software to deploy a secure web server and hardening a Debian
            GNU/Linux system.
            In 2016, I earned a certificate in Criminal Profiling,
            and in 2017 two certificates in Ethical Hacking and
            Social Psychology.
            After that, I worked as an ethical hacker, performing data
            analysis to support people tracking and profiling across social
            media and public data sources.
            At the end of 2018, I was invited by the United Nations
            to participate as a keynote speaker—alongside members of the OAS
            (Organization of American States) and international
            cybersecurity specialists—at the first Latin American
            Cybersecurity Conference, held at the UNASUR parliament.
            Proposed by Inspector
            Silvia Barrera—Head of Technological Crimes
            at the Judicial Police of La Rioja, Spain—I also had a special role
            as a Cyberwall Academy lecturer—the training programme of the
            Spanish National Police, in collaboration with the University of
            Salamanca—delivering keynote seminars on cryptology and
            cryptography.
            Between 2011 and 2023, I wrote for several prestigious software
            security magazines, including Hackers & Developers
            Magazine, The Original Hacker (an independent
            publication), Debian Hackers, and ADMIN Network &
            Security. As an OWASP member, I also contributed
            to the security standards document concerning the design and
            development of user sessions.
            From 2020 to 2025, I focused on designing a security protocol to
            isolate database servers (MySQL/MariaDB) in distributed systems,
            developing a mathematical model to validate software components, and
            creating a strong cryptographic credential system for web platforms.