Programming languages: Java1.5 & 6, JavaScript.
Application Servers: JBoss, WebLogic, GlassFish, Resin, Tomcat, Jetty.
Frameworks: Spring3.2 (Core, MVC including AJAX with JSON/XML, WebFlow, Portlet MVC, ORM/DAO, JMS, WebServises (SOAP/Rest), Security, Social, Memcached, Test, etc modules), Hibernate.
Databases: Oracle, PostgreSQL, MySQL, MariaDB, H2, MS SQL, etc
Technologies, APIs, skills: Lucene Solr, SOAP, RESTlets, RESTful web services, JBoss Drools, DWR, AWS (S3, SQS, MapReduce), PayPal Payflow API (incl. recurring), XML(JAXB, XPath, DOM, SAX, StAX), various connection API (SerialPort, FTP, Telnet, SSH), Java multi-threading & concurrence, GeoIP API, JFreeChart, JDBC, Junit, Liquibase, Logback, Quartz, Problem & bottleneck solving skills, Troubleshooting, Optimization (memory, speed, SQL).
UI: Thymeleaf, JSP, JSTL,JavaScript, JQuery, Prototype, CSS, Html.
Portals: Liferay, JSR-168 & JSR-256, Spring Portlet MVC.
Software methodologies: MVC, Code refactoring, Design patterns, TDD, Agile, Scrum.
Tools: Eclipse, Maven2/3, Gradle, Ant, Svn, Git, JProfiler, Jira ( incl. Crucible for code review), JMeter, ClearCase, CruiseControl, Jenkins , MS Project.
Operating systems: Linux (Debian/Ubuntu, FC, etc), FreeBSD, Windows
Previous dev. skills: C++, C, Perl, PHP, Pascal, VBasic