I am working with asterisk more then 18 years.
Have at least 15 years of extensive DEVELOPMENT work.
My primary services are VoIP systems design, billing for VOIP, web for VoIP/reporting interfaces.
I have compleated some autodiallers, including one with 20k concurrent calls, proved I can do complex modules for freepbx/trixbox, have done some a2billing contributions.
Also I have experience with multi-server VoIP clusters end virtualized VoIP services, including ones in amazon ec2.
-small and large VOIP system based on SIP protocol
-general VoIP architecture design
-web and billing for VoIP
-support for asterisk, FreePBX/trixbox and a2billing, openser/kamailio/opensips.
-modules and addons for asterisk, freepbx, a2billing
-load-balance using openser/kamailio/opensips
-virtualization with openvz, xen, amazon ec2 service.
-support for linux systems and supply services for voip.
-create network storage clusters, mysql replicated setup, mysql-clustered experience
-per hour support and consulting for all above
every finished project have free limited 10 day support&bugfixes.
note, I have near zero aborted projects, most of them from client-side. I have NO "work-in-progress-forever" list like a lot of users have. so the completion rate is REAL.
The only thing I not do is graphical design work, I'm sorry, but it is hard to be professional in VoIP and design in the same time. I have choosed to be best in VOIP
Voip developer,work as freelancer.
Working with complex voip system, virtualization, clustering.
May 2000 - Mar 2005 (4 years, 10 months)
Have created billing system for voip, voip support, dialup billing(internet access) system.
Cisco, Asterisk, Sipura, Dlink, Polycom devices experience. Linux/Freebsd
Kyiv National Taras Shevchenko University, Ukraine 1999 - 2004
Kyiv National Taras Shevchenko University, Ukraine 1999 - 2003
The Digium Certified Asterisk Administrator (dCAA) program is intended to validate basic competency with Asterisk. It requires general telephony and VoIP knowledge as well as specific Asterisk knowledge related to installing, configuring, and administering an Asterisk system. Digium Certified Asterisk Administrator certification is awarded after earning a passing score on the dCAA examination.
CISCO CERTIFIED NETWORK ASSOCIATE
Cisco network level basic certification
Stackoverflow-like service, questions about asterisk/voip, top score profile
Top score on SO in asterisk category. http://stackoverflow.com/tags/asterisk/info (profile id is arheops)