Jeroen has been working on compilers and high level languages for most of his career. He started looking into LLVM in 2011 and has since then worked on extending LLVM and Clang. This includes adding support for embedded architectures with unusual properties, automatic backend generation, flexible runtime frontend and backend configurability, extending the support for c99 restrict, etc. He has been helping with the FOSDEM LLVM dev rooms and some of the Belgium socials. He can also be found in the 4-weekly LLVM Alias Analysis tech calls.