Use FreeBSD since version 4.2 and linux since kernel 2.0 to deploy web applications and others services.
Use virtualization technology like VMware ESX, VirtualBox, Amazon EC2
Interested in DevOps, Puppet, OpenStack, vagrant etc.
I have written applications with diferent technologies like:
C/C++, PHP and python backends and in web tier use:
Java EE, with Netbeans IDE, over Struts MVC framewrok
PHP 5 with CodeIgniter MVC framework
.NET C# with WebServices (only the finish career project)
Python scripts, backends and REST API with django full OOP (all def belongs a one class in my code)
for persistence use MQ message brokers, ORM's and raw methods against PostgreSQL, mySQL, SQLServer, Oracle, sqlite.
NoSQL and MapReduce.
