He is a freelancing software engineer working in Alan Kay's group since 2006. His work ranges from virtual machine technology to end-user authoring systems. Being a long-time Smalltalk developer he dig dynamic languages and live programming environments. Previously he worked at impara, building a 3D authoring system for children in Squeak. In his PhD research before that he created a real-time non-photorealistic 3D renderer (featured in the OpenGL Shading Language book)."