I have been working with Asterisk for more than 18 years. I have at least 15 years of extensive development experience. My primary services include VoIP system design, VoIP billing, and web interfaces for VoIP and reporting. I have completed several autodialers, including one handling 20,000 concurrent calls. I have proven experience building complex modules for FreePBX and Trixbox and have contributed to A2Billing. I also have experience with multi-server VoIP clusters and virtualized VoIP services, including deployments on Amazon EC2. Small and large VoIP systems based on the SIP protocol General VoIP architecture design Web interfaces and billing systems for VoIP Support for Asterisk, FreePBX/Trixbox, A2Billing, OpenSER, Kamailio, and OpenSIPS Modules and add-ons for Asterisk, FreePBX, and A2Billing Load balancing using OpenSER, Kamailio, and OpenSIPS Virtualization using OpenVZ, Xen, and Amazon EC2 Linux system support and VoIP-related services Network storage clusters, MySQL replication, and MySQL cluster experience Hourly support and consulting for all of the above Every completed project includes free, limited 10-day support and bug fixes. Note: I have nearly zero aborted projects, and most cancellations were client-side. I do not have a “work-in-progress forever” list like many providers. My completion rate is real. The only area I do not cover is graphical design. It is not realistic to be professional in both VoIP engineering and design at the same time. I have chosen to specialize and excel in VoIP.