- Java 1.0.2 - 1.6, J2EE, JNI, RMI, Swing, EJB, JDBC, JAXP, JDOM, Servlet API, JSP, Struts, Tiles, AXIS (Soap), Tomcat 4/5/6, JBoss 3/4/5, BEA WebLogic 8.1 (experience in projects und certificates Sun Certified Programmer for the Java Platform 6, 2008, Sun Certified Web Component Developer, 2004, Sun Certified Programmer for the Java 2 Platform 1.4, 2003)
- Microsoft Visual C++ 1.5 - 6.0, Microsoft Foundation Classes (MFC), Win32 API, Win 3.x API, ODBC API, WinSock API (experience in projects and certificate Microsoft Solution Developer, 1997)
- Microsoft Visual Basic 2.0 - 5.0, JetEngine with Microsoft Access DB, DAO, ADO, various VBX/OCX Controls (experience in projects and certificate Microsoft Solution Developer, 1997)
- C following ANSI and K&R for UNIX and MS-DOS, curses windowing library, Codebase B-tree library, KOMBIS EM9750 API (experience in projects)
- Multimedia Toolbook 3.0, TBDC (experience in projects)
- PROGRESS 4GL & RDBMS V6.2 (experience in projects)
- Clipper versions A85 - 5.2, various additional Clipper libraries from KRS, CA, Huggle & Partner (experience in projects)
- UNIX shell (bash, ksh, sh) and other development tools (experience in projects)
- Pascal, Modula, various BASIC interpreters
Development Tools:
- Eclipse 2 - 3.4, ANT, Maven, JBuilder, Visual Age for Java 2 - 3
- Rational Rose
- SVN, CVS, Perforce, MKS Source Integrity (MKSSI), UNIX SCCS
- Bugzilla, GNATS
Modeling:
- OOA / OOD, UML OMG certified UML Professional (OCUP) Fundamental, 2008
- ER - Entity Relationship
Networking:
- TCP/IP, NFS and Samba for UNIX/Linux
- DSL/ISDN router and firewallsoftware for Linux
- Apache httpd and CGI for UNIX
- uucp and UseNet for UNIX
Operating Systems:
- Apple Mac OS X since Tiger
- Microsoft Windows XP/NT4/NT3/98/95/3.1 (certificates Microsoft Product Specialist for Windows XP Professional, 2004, and Microsoft Product Specialist for Windows 95, 1997)
- Linux since version 1.2.13
- Sun Solaris / SunOS
- Interactive UNIX SysV 3.2, Versionen 1.0.6 - 3.0
- SCO-Xenix
- HP/DEC OpenVMS 7.2
- MS-DOS since Version 2.11