Brussels / 4 & 5 February 2023


Waldemar Kozaczuk

Waldek Kozaczuk is a software developer and architect. During the day he is busy designing and building components of the video supply chain for CNN at WarnerBros Discovery. During the night he is busy improving OSv, an open-source versatile modular unikernel designed to run a single unmodified Linux application securely on top of a hypervisor. He has been contributing to the project since 2016, when he first got exposed to and fascinated by OSv. Four years ago he was nominated as one of its committers. In that time, he has contributed over 500 patches, which most notably involved enhancing OSv to run on AWS firecracker ( and improving ARM port. Finally, he gave a presentation about OSv at the P99 conference in 2021 (


Title Day Room Track Start End
Evolution of OSv: Towards Greater Modularity and Composability Sunday H.1308 (Rolin) Microkernel and Component-based OS 12:00 13:00