Ivan St. Ivanov is development architect at SAP Labs Bulgaria. He is now working in the HANA Cloud Platform team, focusing on performance topics. In his free time he likes contributing to open source software, mostly to JBoss Forge. He is active JUG member, co-driving the adoption of OpenJDK in Bulgaria. 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, Java EE and SOA in three Universities in Sofia.