Programming languages
- PHP (+10 years)
- Python (+4 years)
- HTML5/CSS3/JavaScript/AJAX (+4 years)
- C (+7 years)
- C++ ( +3 years)
- Visual C++ (+3 years)
- Assembler (+3 years)
- Visual Basic (+3 years)
- Java (+2 years)
- ASP (+2 years)
- WML
- XML
Programming
- TCP/IP (Client/Server applications)
- Internet (Protocols)
- MySQL databases
- PostgreSQL databases
- Cryptography
General
- Hardware
- Windows and Linux networks. (Administration and configuration)
Frameworks
- Drupal - drupal.org - PHP/mySQL Web framework (+8 years)
- Wordpress - wordpress.org - PHP/mySQL Web framework (+1 years)
- PEAR - pear.php.net - PHP framework (+3 years)
- wxWidgets/wxPython - wxpython.org (+2 years)
Platforms
- Windows
- Linux/Unix
- PalmOS, Windows CE and Pocket PC
- Java/J2ME
Development tools
- Eclipse and Netbeans
- CVS, SVN and Git among others.
- Zend Development Environment (ZDE) – PHP IDE
- Microsoft Visual Studio
- gcc/gdb on Linux