• Software Development: OO Design Patterns, UML, RUP, J2EE (EJBs, Web Services, JSP, Servlets, Swing, Struts/Tiles, Spring, Hibernate, Velocity), Python (Django, Gevent, Twisted), C++, Scala, CORBA, XML, C, Perl, JavaScript, .NET (ASP.NET, C#, Web Services), PHP, Ruby (Rails), Erlang, shellscript (Bash, AWK), PL/SQL, CAML, Prolog, Assembly (x86), Flex, Bison, Lisp, Pascal
• Systems/Networks Administration: UNIX (Linux, Solaris, OpenBSD), Windows (WinNT-2003), Traffic Shaping, High Availability
• Services Administration: WWW (Apache, Tomcat, uWSGI, Nginx, lighttpd), RDBMS (MySQL, Oracle), NoSQL(Cassandra), Zookeeper, Solr, Perlbal, Mail (Exim), DNS (BIND).
• Security: secure system