Portrait of Ryan Castellucci in 16 bit era ‘pixel art’ style. Long brown hair, light skin, androgynous features, smiling slightly.


I’m a professional computer security researcher with an extensive background in Linux systems administration, computer networking, applied cryptography, and programming. Since childhood, I’ve enjoyed taking things apart and learning how they really work. Deep understanding allows me to push the boundaries of what is possible. Originally from California, I now live in London.

I’m non-binary, so please use gender-neutral language when writing about me. My pronouns are they/them, and I have a page with further details for reference.

My family name is pronounced “kas-teh-LOO-chee”.


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