Application Programming Interface (API), Artificial Intelligence (AI), Bash Scripting, Billing, Call Routing, CentOS, Customer Relationship Management (CRM) Systems, DNS (Domain Name System), English as a Second Language (ESL/TESL), Firewall Administration, High Availability, Identify Issues, JavaScript, Linux Administration, Load Balancing, Lua, NAT (Network Address Translation), Open Source, Problem Solving Skills, Production Systems, Python Programming/Scripting Language, REST (Representational State Transfer), Realtime Transport Protocol, SIP (Session Initiation Protocol), Scripting (Scripting Languages), Sockets, Streaming Technology, Systems Administration/Management, TCP/IP (Transmission Control Protocol/Internet Protocol), Ubuntu, Unix System Administration, VoIP (Voice over IP), Voice Applications, Voice Response Systems, Wireshark (Ethereal), tcpdump