He is currently CEO of Codenotary Inc., a provider of solutions to record business data immutably, using and initiator of the open source project immudb.io. He was previously a general partner of Texas Atlantic Capital LP, a venture capital company. Prior to that, he was a co-founder of
Qumranet. Qumranet was sold to
Red Hat in 2008 for US$107 million. He previously co-founded the company behind the
Xen software,
XenSource, which was sold to Citrix for US$500 million in 2007. Before that he founded Qlusters Inc, and was the founder, main developer and project manager of
openMosix. Furthermore, he frequently acts as an
angel investor in high-tech
start-up companies such as Hyper9, Neebula, Delivery Hero SE, and Qlayer, which was sold to Sun Microsystems in January 2009. The author of several books on
Linux,
file systems and
open source development, he was also a senior editor at
Byte Magazine for over eight years. He also taught at
Tel Aviv University. == References ==