VOIP, Call centers, Vicidial, A2Billing, AGI, module development • 7+ years application development, with 5 years in web applications.• Strong experience in VoIP technologies (Call center solutions, scripting, IVR, etc)• Hands on experience in Linux Operation System, installation, administrating, development, configuring for projects, installing project environment.• Experience in Server monitoring tool development, based on SNMP, NetFlow and other different system sensors, using Perl, Bash scripting for collect data.• Network performance testing on Linux based systems, using Perl and transfer data to special data storage server using Sockets.• Good experience in Perl scripting on Linux using a lot of Perl CPAN and own written modules.• Hands on experience in Perl WEB development, mod_perl using for creating GUI.• Hands on experience in Perl and Database communication and optimization of data processing.• Strong working experi