Perl: has in-depth knowledge and experience with Perl techniques like regular expressions, hash and arrays, general data processing, IPC, multi-threads, CGI web applications, automatic web-based scripts and back-ends, email and paging alarms, collecting information from websites (spiders), DBI interface for Oracle, Sybase and MySQL, data compression techniques.
VOIP: up-to-date experience with the open source PBX systems installation and maintenance: Asterisk 1.2, 1.4, 1.6, hands-on PRI/T1/E1, analog Zaptel cards and channel banks configuration, IAX2, SIP, STUN, hardware and software phones, Asterisk GUI, IVR menus, voicemail, custom AGI scripts, reviewing and provisioning connections with VOIP providers, resolving NAT and firewall issues, software phones installations. Fax-to-Email, Email-to-fax gateway configuration based on spandsp and Fax For Asterisk. Monitoring calls using web-based flash panel. Sound files preparation, format conversion.
MySQL: general database development experience and planning, optimized SQL queries, web front-ends with PHP, Perl, Java, utilizing solid ground-breaking approach for database development. Tuning performance issues, bulk data load implementations and automatic backup scripts, handled big tables with millions and billions of records sized in gigabytes and terabytes, under both MyISAM and InnoDb, troubleshooting, complicated cases of slowness and imperfections with database design.
Unix: worked with SunOS, Solaris, HP/UX, SCO, BSDi,...
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