Usama Dar has over 13 years' experience working with software systems. During this period, he has not only worked with large companies such as Nortel Networks, Ericsson, and Huawei, but has also been involved with successful startups such as EnterpriseDB. He has worked with systems with mission-critical requirements of scalability and high availability. He writes actively on this website: www.usamadar.com. These days, Usama works at the Huawei Research Centre in Munich, where he spends most of his time researching highly scalable, high-performing infrastructure software (such as operating systems), databases, and web and application servers.