Experienced network and system engineer with over 16 years professional experience, contracting for Google, T-Mobile, AT&T, Orange, Verizon. Areas of expertise: Linux, Solaris, Cisco, Juniper (routing, switching, security, MPLS).
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I am focused in VoIP field only and I have been working here for more than 8 years. My Area of experiences: VoIP -Asterisk PBX: Full proficiency -FreeSWITCH: Full proficiency -Yate: Full proficiency -Strong knowlege of SIP protocol and SIP routers/proxy servers -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVR and Auto Attendant Development -Secure VoIP: TLS, SRTP, ZRTP SQL -MySQL/PostgreSQL - design, maintenance and optimization of databases -NoSQL: MongoDB Various Billing solutions and GUI: -A2Billing: Full proficiency (configuration from scratch, customization) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime for Asterisk and FreeSWITCH) -vBilling (billing for FreeSWITCH) -FreePBX: GUI for Asterisk -Fusionpbx: GUI for FreeSWITCH I have successfully completed large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integration of various VoIP solutions into existing network environment. I also have experience in building of secure "bastion" VoIP/Linux servers. Terms: Hourly based projects: -Current hourly rate is $40. Fix price projects: -Fixed price projects are calculated based on the hourly rate and expected task complexity. -For all fixed price projects complete project specification with clear tasks description is required -For all fix price projects work will be started only after payment has been escrowed and both parties have agreed with working terms.
My main skills are in systems administration (Linux/Unix and Windows) and large scale networking (Cisco/Juniper and Vyatta). I have over 10 years full time experience work with some of New Zealand's busiest networks. If it beeps I can work with it! I have been involved with many complex projects mixing many technologies, I am extremely technically competent but at the same time fully capable of presenting my ideas to non-technical people in an easy to understand manner. I am able to think outside the box to deliver solutions that fit my customers needs rather than having to be spoon-fed ideas. Interview me today - you will not be disappointed. I specialise in : - Infrastructure Design - Security Design and Testing - Large Scale Networking - Large Web Deployments - Large Database Deployments - Large VoIP Deployments - Enterprise Grade VPN Solutions - All aspects of Linux/Unix/Windows design and deployment (from single server to 100 node web farms)
Over the past 6 years, I have installed and configured a total of around 1,000 seats call center system with a maximum of 14 servers on one site using Vicidial on both standalone and multi-server setup. I have also installed and configured IPPBX systems, VOIP systems, GSM gateway systems and asterisk-based systems using FreePBX and Elastix ranging from small to medium business enterprises including integration of IPPBX to a legacy PBX(PABX) and to CUCM. My core competencies lies in Asterisk, Vicidial, GoAutodial, Vicibox, FreePBX, Elastix, Linux, SIP, IPPBX and PABX/CUCM integration, VOIP systems and GSM gateway systems. Installing and maintaining VOIP and call center systems remotely to my clients in the US, Singapore, Philippines, China, UK and Middle East has also helped me improved my skills and the way I deal with people especially in interacting and communicating with top management or owners of the business. With this, I'm seeking opportunities to install, develop, configure and support call center systems, VOIP systems and IPPBX systems from the ground up for you or your business. I have also experience in the following areas: - MySQL and Apache - Linux(CentOS, Redhat, Ubuntu, Opensuse, Fedora) and Windows Operating Systems - Microsoft Office applications - Basic to advance TCP/IP networking configuration - Basic to advance troubleshooting(system, software, hardware and networking) - SDLC, UML Diagrams and OOP diagrams - FTP - Remote desktop support - Firewall and linux/shell scripting - Softphones(Eyebeam, Bria Xlite Zoiper and Ekiga) configuration - IP Phones(Mitel, Polycom, Escene, Grandstream, Yealink, etc) configuration - Video Phones(Grandstream, Yealink, etc) configuration - Operator phone configuration - FXO/FXS gateway configuration - VOIP gateways(Dinstar, Grandstream, Audiocodes, Quintum Tenor, Digium) configuration - Sangoma/Digium/Atcom/Openvox card configuration(TDM/Analog, E1, E1R2, PRI/BRI, ISDN) - Multi-tenant IPPBX
I work on IT more than 12 years. VOIP/Asterisk Developer, Expert System Administrator and Network Administrator, Perl Programmer. Generally, I develop solutions based on Asterisk and speech technologies (speech synthesis and speech recognition systems), complex IVRs, integration with external sources and databases, custom click-to-call and callback systems, etc. I prefer custom development for Asterisk and FreeSWITCH. Usually, I use Perl for development. I have huge experience in solutions based on Asterisk such as FreePBX, Elastix, Trixbox, vicidial, etc. Also I support critical 24x7 systems, administration networks and servers, perform IT consulting, etc.
I am an innovative, extremely detail oriented and perfectionist Software Development Architect, with expert knowledge in VoIP, audio/video streaming and processing, messaging and social media. My a little over 8 years of experience in VoIP industry gave me a strong knowledge of the protocols, technologies and available solutions. 3 years of successful mobile applications development, architect and project management gave me confidence in creating robust and technologically challenging applications. I am passionate about developing robust, innovative and leading edge applications, getting increasingly challenging assignments and applying disruptive technologies. Looking for a work on technologically challenging projects (in an agile environment preferably), while offering my expert knowledge base, ability to learn quickly and apply new techniques. I usually bid slower than others, because of reading the full job description, trying to estimate all requirements, needed technologies and solutions.