My specialization is Java coding. Java Web applications based on JPA, JSF. Most of my projects were built on Hibernate JPA + PrimeFaces. Favorite application server is JBoss. Have experience with building WebSpiders, based on Swing Browser component. Experience with Bitcoin applications using BitcoinJ framework. System administration: VPN servers, MySql, Postgresql, JBoss, Glassfish, Nginx, Debian, Ubuntu.