voip Asterisk OpenSIPS developer

Budget $15 - $25 USD / hour
Bids 11
Average Bid $26
Status Closed

We are builiding voip platform for enterprise users, we need voip developer:

- OpenSIPS / Kamailio + loadbalancing,failover ( realtime prepaid billing)

- Asterisk (multi-teenant)

- prepaid,postpaid billing

Developer should have especially skills in OpenSIPS / Kamailio .

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Bids on this Project

  • Yunas Profile Picture


    Birmingham,  United Kingdom

    Skills: - AGI, AMI , CTI, PHP/MYSQL , CakePHP, CodeIgnitor, WordPress, Joomla, Open Cart. PBX:- Asterisk , FreePBX, OpenSips, Kamalio, FreeSwitch, VoIPSwitch. Billing:- A2Billing, A2Billing Customization, A2Billing Integration, A2Billing Redesigning ,Custom Billing Solutions. IVR :- DTMF IVR, Voice Recognition IVR, Payment Gateway Integration with IVR, IVR Survey, IVR booking system and at any level of IVR development. SMS:- SMS Web Integration, 2way SMS. SMS integration with A2Billing, SMS integration with IVR. Web Development:- CodeIgnitor , CakePHP, PHP - MySQL, Wordpress, Joomla. Termination: SMS Termination , Call Termination using hypermedia Gateway, Eurotech Gateway ,etc. and Custom Built Gateway's. Contact me and stop regretting decisions. Love and peace for all. Thanks for looking at this profile.

  • smnaushad Profile Picture


    Bangalore,  India

    mobile experts

  • danipopa Profile Picture


    Bucharest,  Romania

    I'm working with voip since 2003, i worked for AG Projects - opensips Consultans, as engineer. http://www.ag-projects.com/component/content/article/51-organization/483-credits

  • monkeysign Profile Picture


    Stara Pazova,  Serbia

    Linux pro for over 10 years. My specialty is troubleshooting and fixing server problems when everyone else fails to do it. Can diagnose and fix almost anything, except in case of hardware failures.

  • attocom Profile Picture


    Bangalore,  India

    Atto Communications is founded by experienced Telecom, Networking & Embedded professionals coming from companies like Cisco, Juniper, Inter Digital, Agilent & Huawei  Atto has strong partner network in Hardware & Staffing services  Atto has a team of associates and employees who are some of the best in the industry.  Focused on delivering solutions to Telecom, Networking & Embedded Industry  Experts in the area of System Architecture, Design, Development, System Testing and Test Automation.  Domain expertise in Wireless (UMTS/LTE/EVDO), Networking (MEF, Ethernet, IP, TCP, Switching, Routing , MPLS), Optical (SONET, SDH, GMPLS, GPON) and Embedded (Kernel programming, Device Drivers, BSPs)

  • captek Profile Picture


    chandigarh,  India

    Over 7+ Years experience in the area of VoIP Softwares & Applications Development, Web & Smartphones Applications, WebRTC, Website Design/Development, IVR. VoIP Service: - Asterisk/Freeswitch/A2billing Installation, Configuration & Customization - IPPBX Setup & Configuration - CallCenter Software - DID Management - Voice/SMS Broadcasting software - Auto/Predictive Dialer - Calling Card Business Setup - Real Time billing software - Distributed Server Architecture with Load Balancing and Failover setup - Server Maintenance & 24*7 Support Smartphone Application Development: Platforms : IOS, Android, and Windows Mobile. - GPS Based Application Development - Social Networking - SMS, IM Chat Implementation - Location Based Applications - VoIP/SIP Mobile Dialer - Restaurant Application - ecommerce Application Web Design & Development - Static/dynamic Site design - Joomla, Wordpress, Bigcommerce, Magento, Drupal, YII Framework - Ecommerce Sites - Content Management System

  • altronvoip Profile Picture


    Kharkov,  Ukraine

    JSC "Altron" have more than 10 years of experience in development and production of solutions in communications and security systems areas. The company is one of the oldest and largest Ukrainian suppliers of integrated solutions and equipment for communications segment, government departments, ministries and security services, emergency and dispatch services, aviation, Ministry of Emergency Situations, medical facilities, different Call-centers.

  • eurolan Profile Picture


    Sofia,  Bulgaria

    Hi, my name is Arsen I am a team leader of Eurolan. We are small and well-established international team of developers and linux/bsd administrators. We are only focused in VoIP field and we are working here more than 7 years. Our area of experiences includes: VoIP -Asterisk PBX: Full proficiency -Freeswitch: 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. -IVRs/Auto Attendant Development. SQL -MySQL/PostgreSQL - design, maintenance and optimization of databases -NoSQL - MongoDB Various Billing solutions: -A2Billing: Full proficiency (configuration from scratch, customisation) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime stat for asterisk and freeswitch) - vBilling (billing for Freeswitch) We successfully completed a large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integrating of various VoIP solutions into existing network environment. We also have experience in building of secure "bastion" VoIP/Linux servers. Current hourly rate is $40. Fixed price projects are calculated based on the hourly rate and expected task complexity. If you choose our service we will start work on your project immediately, and we will provide you with all updates as soon as it possible. Thank you.

  • hfvoip2012 Profile Picture


    Shanghai,  China

    web programmer,linux,system administrator,php,asterisk,opensips,kamailio,etc Feb 2014, I help to implement 1800avas call center, it has 4 asterisk servers for now provding hosted voip platform at benzvoip.com benzvoip August 2011 – Present (8 months) shanghai on demand voice broadcast service check www.benzvoip.com programmer and system administrator http://www.zenofon.com and http://wwww.zenoradio.com a small opensips job for conference solution of www.parlor.fm September 2010 – Present (1 year 7 months) brooklyn,ny web programmer http://www.laws.com March 2010 – August 2010 (6 months) NYC web programmer ,also for hospital.com,etc web programmer Zyacom USA, LLC 2009 – 2009 (less than a year) voip programmer talkbus 2006 – 2008 (2 years) voip engineer martin's voip project

  • abusayed2004 Profile Picture


    Dhaka,  Bangladesh

    Work 7 years on VoIP, Asterisk, A2billing, Vicidial, And any Asterisk based distro. Vtiger CRM, Open VPN, Cent OS, VoIPSwitch, VOS3000, MVTS with oracle DB, or Mysql Red hat, PHP script writer for IVR and AGI implementation on asterisk , have a good team for support and further development.