Open Source enthusiast and developer. Works mostly in JVM related technologies and frameworks, such as: Liferay, Vaadin, Clojure, OSGi and BPMS.
Author of Ganelon - a micro-framework easing the pain of developing AJAX apps in Clojure/Ring available under Eclipse license (same as Clojure). Also, initial founder of Aperte Workflow (Liferay, Vaadin and OSGi based BPMS) and Aperte Reports (Jasper reporting for Liferay) Open Source frameworks.
GitHub profile: http://github.com/tlipski