Viliam Ďurina

Leading the team developing the SQL query engine for Hazelcast. Earlier developer on the Hazelcast Jet product, an In-Memory Streaming and Fast Batch Processing engine, now integrated into the main Hazelcast product.

Responsibilities: – Set the design and architecture for company projects – Analysis of technical aspects of projects – Support for other colleagues at toughest technical challenges: performance issues, threading issues, memory leaks, memory overuse, SQL performance, Hibernate issues etc. – Regular programming work (as an Android and Java developer)

Participated in the analysis, implementation and support of customer applications. Main Projects: – Back-office application for Slovak Post – Designed the architecture for other company projects – Danube River Information Services and others Major technologies: Java, J2EE, Vaadin, Hibernate, Web applications, API design, relational databases (Oracle, PostgreSQL), WebServices, XML and lot others…

- created web applications (JSP, JSF, Oracle ADF, Servlets) - back-office processing: PL/SQL, Unix scripts, processing/generating tens of file formats (xml, xls...) - DB Oracle SQL optimization - requirements analysis, design at all tiers, technical design, implementation