Käyttäjän ivan381eu profiilikuva
Maan Serbia lippu Belgrade, Serbia
Jäsen alkaen 20. tammikuuta 2011
2 Suositukset


Online-tilassa Offline-tilassa
Basic services: custom VoIP system design, VoIP billing, custom Web GUI for Asterisk appliances. I can handle any request related to VoIP servers, Asterisk PBX as well as specific Asterisk appliances (FreePBX, ViciDial, GoAutoDial, TrixBox). For more then 600 simultaneous calls I recommend SIP server Kamailio with many Asterisk nodes behind. - small and large VoIP system based on SIP, IAX, H.323 - VoIP architecture design - Web GUI and billing for VoIP - support for Asterisk, FreePBX, Trixbox, A2Billing, OpenSER (Kamailio or Opensips). - custom add ons for Asterisk, FreePBX, A2Billing - VoIP load balancing using OpenSER (Kamailio or Opensips) - support for Linux systems and suplimentary services for VoIP - "on call" support and consulting for all above
$40 USD/hr
48 arvostelua
  • 85%Suoritetut työtehtävät
  • 100%Budjetin mukaisesti
  • 100%Ajallaan
  • 36%Uudelleenpalkkaamisaste


Viimeaikaiset arvostelut

  • käyttäjän itmigfin kuva FreePBX Random Call Module €450.00 EUR

    “Professional , Helpful even in problem that wasnt his part of the job”

  • käyttäjän chadclund kuva Ubuntu/Kurento Installation on AWS EC2 $292.50 USD

    “Ivan completed the required work and went above and beyond our expectations. He was a pleasure to work with, professional, and has a vast knowledge of his skillset. I will definately use again!”

  • käyttäjän DavidLifson kuva Application Development Programming €4797.00 EUR

    “Ivan is a pleasure to work with. Communication is very important and Ivan understands that this essential to the success of a project. He ask questions when appropriate and communicates his progress.”

  • käyttäjän Martin E. kuva REST server & Asterisk SIP-URI call €355.00 EUR


  • käyttäjän mattl kuva ViciDial campaign import customizing $350.00 USD

    “since completing this project I have done 2 others with him. I really enjoy working with a developer who does not stop at any obstacle. Thanks Ivan!”

  • käyttäjän DavidLifson kuva Application Development [Sealed]

    “This guy is great. He has excellent knowledge and does not bullshit. I would highly recommend him for your project unless he is doing another one for me!”


VoIP Consultant

Oct 2010 - Apr 2012 (1 year)

- VoIP cluster monitoring, traffic over 10k+ minutes monthly, - Project Management (VoIP Call back solution, DID traffic failover improvement), - Consulting (Advice on new and existing, voice and video services)

Project Manager

Sep 2007 - Jul 2010 (2 years)

- SIP server monitoring system, - SIP server adaption for communication via H.323 protocol - Ministry of Foreign Affairs of the Republic of Serbia - autonomous telecommunication system (numeration indepedent from local Telco, interoperability with Siemens, Avaya, Panasonic PBXs via ISDN PRI), - VoIP call back solution (PSTN & GSM to VoIP) - Centralized monitoring system for 50+ Asterisk IP PBX installations, - Asterisk based Call center solution design, - Asterisk IP PBX customized solutions, - Mass


University of Belgrade - Faculty of Mathematics

1987 - 1991 (4 years)


Red Hat Certified Security Specialist (RHCSS) (2010)

Red Hat

An RHCSS certification may be earned by a Red Hat Certified Engineer (RHCE) who has demonstrated deeper capabilities in networking services security, directory services, authentication, and SELinux policy management. An IT professional who earns an RHCSS certification has met the security requirements for today's enterprise environment.


IT weekly "COM"

During the 5 years period I published number of articles about Linux, Web services, VoIP security, Asterisk appliances, Kamailio SIP proxy, MySQL clustering etc.


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