About Stef

Stef Joosten, architect of register systems for government and co-designer of the Ampersand language.

I am Stef Joosten. I work as an architect on register systems for government and co-design Ampersand, a language in which rules about data are laid down with mathematical precision.

This page will get a photo, a short overview of my work, and the systems I may name with the consent of their owners.