Software Engineering (RAD, RUP, V-Model):

- Software Requirements Specification (SRS IEEE Std. 830)
- Software Architecture, Design, Implementation ( Model Driven Architecture / Software Developement, CASE, UML 2 )

Programming:

- Java EE / web developement ( JEE5, JSP, JSF, EJB3, JPA, Hibernate, JBoss Seam, GWT, SAX )
- Java network programming (RMI, Jini, Hessian, Sockets)
- Java SE GUI developement (SWT, Swing, ImageIO)
- Java ME mobile devices developement (MIDP / CLDC, High Level )
- PHP 5 web developement (Symfony, Propel, PEAR)
- Groovy web developement (Grails), shell scripting
- (X)HTML, CSS, JavaScript (DOM, AJAX )
- MySQL
- XML
- Python, Perl
- Unix shell scripting ( sh / bash )
- C/C++ (STL, Visual C++ Win32 & MFC, OpenGL, Pattern Recognition + Image Manipulation on Unix)

Linux/Unix system administration: Arch Linux, FreeBSD, Ubuntu, Debian