Jeff Garzik is the co-founder of Hemi, a next-generation layer-2 network powered by Bitcoin and Ethereum. He has long been at the center of developing and commercializing open source software related to Bitcoin and blockchain technology. Previously, he spent five years as an early Bitcoin core developer and ten years at Red Hat. Jeff's work with the Linux kernel is now found in every Android phone and data center running Linux today. He also served as a board member of The Linux Foundation.