Ivan St. Ivanov is development architect at SAP Labs Bulgaria, working in the HANA Cloud Platform performance team. He is a leader in the Bulgarian JUG, driving the adoption of OpenJDK in Bulgaria. In his free time he likes contributing to open source software, mostly to JBoss Forge. Ivan is doing his PhD in the area of cloud multi-tenancy in the University of National and World Economy in Sofia. He is teaching Java and Java EE in the Sofia University.