Asterisk Consultants & Developers

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Hire a skilled freelance Asterisk developer to build multi-protocol, real-time communications applications solutions for all your needs. Experienced Asterisk contractors can set up predictive dialers, call centers, VoIP gateways, conference servers, IP PBX systems and other applications.

Asterisk is a popular open source framework for building communications applications. The platform uses scripting languages to create business phone systems, conference bridges and other communications protocols and technologies. On Upwork, the world’s largest online workplace, companies hire Asterisk experts to handle all their communication needs.

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Asterisk Job Cost Overview

Typical total cost of Upwork Asterisk projects based on completed and fixed-price jobs.

Upwork Asterisk Jobs Completed Quarterly

On average, 52 Asterisk projects are completed every quarter on Upwork.

52

Time to Complete Upwork Asterisk Jobs

Time needed to complete a Asterisk project on Upwork.

Average Asterisk Freelancer Feedback Score

Asterisk Upwork freelancers typically receive a client rating of 4.59.

4.59
Last updated: May 1, 2015
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  1. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 23 hours ago - Tests: 2 - Portfolio: 6

    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 Full proficiency in free Billing/CDR 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) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. 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. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -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 es-crowed and both parties have agreed with working terms.

    $55.56 /hr
    126 hours
    5.00
  2. Stamatis Kekes

    Stamatis Kekes

    Senior system administrator and PHP - C - Perl developer

    Greece - Last active: 23 hours ago - Tests: 11 - Portfolio: 2

    Very skilled Unix system administrator, with lot of experience in Linux ( Centos, Redhat, Fedora, Ubuntu, Debian, Gentoo, Slackware ), Solaris, xBSD ( FreeBSD, OpenBSD), vpn ( openswan - ipsec, openvpn, l2tp, pptp ), clustering ( LInux Virtual Server, Linux HA, vrrp, Solaris Cluster ), cloud computing, load balancing ( f5, haproxy ), VoIP ( asterisk ), databases ( MySQL, PostgreSQL), LDAP, web services ( Apache, Nginx, varnish ), security ( penetration testing, firewall policy design ), control panels ( CPanel, Plesk, Virtualmin, Ensim ), Virtualization ( VMWare Virtual infrastructure - VSphere, amazon EC2 ). As for Developing I am very experienced in C, PHP, Perl, javascript, ajax and many more to list.

    $16.67 /hr
    1,643 hours
    4.79
  3. Abu Sufian

    Abu Sufian

    Linux,VoIP and Windows Server/Network Administrator

    Bangladesh - Last active: 24 days ago - Tests: 9 - Portfolio: 10

    I have over 6 years of hands on experiences in maintaining various servers mostly Microsoft & Linux based systems. Areas of my expertise are: 1. Asterisk, Elastix, Trixbox, FreePBX, Vicidial, A2Billing 2. Amazon EC2,S3,VPS,VMWare,ESXi,Xen,Open VZ 3. Mysql & MSSQL server 4. Windows based Servers, LAMP, Mail, DNS, Proxy Server 5. OpenVPN and L2TP/IPSec VPN 6. Webmin,Cpanel, WHM,Zpanel 7. Cisco,Mikrotik, DD-WRT,OpenWRT

    Groups: Microsoft Certified Professionals

    $8.00 /hr
    1,680 hours
    4.99
  4. Waqas A.

    Waqas A.

    Mr.

    Pakistan - Last active: 11 days ago - Tests: 3 - Portfolio: 1

     Design and implementation of Vmware ESX and ESXi Server/ Vsphere and other virtual technologies (VMotion, SVMotion, VHA, SVHA, FT, DRS, Power Management etc.)  Performs the tasks of designing Advanced Security & Management Solutions.  Design and implementation of DNS Servers, Unbound DNS Server, Kerio Mail Servers, Send Mail Server, TACACS Server, CRM System, DOCSIS Cable Modem Termination System, Incognito DHCP Broadband Command Centre for CMTS.  Bandwidth management for Optical Fibre customers on Routers and Switches, Monitoring of links by using network performance monitoring tools such as Cacti, Manage Engine Netflow Analyzer, Solar Winds, Smonitor, Nagios etc  Implementation of routed & routing protocols, like OSPF, BGP, EIGRP in live environment  Worked on Cisco 2950, 2960, 3550, 3560, 3750, 6509 switches and 2500, 2600, 2800, 3600, 3700, 7200,  7600 series Routers in real environment approx. 500 Hours.  Implementation of (VLANs, VTP, RSTP, MSTP, ETHERCHANNEL, INTER VLAN ROUTING, HSRP, PRIVATE VLAN, SWITCH PORT SECURITY)  Design and implementation of VPNs ( Site-Site, Remote Access, DMVPN, IPSec over GRE, Get Vpn)  Design and implementation of MPLS VPNs  Management of CAR on routers and switches by rate limited feature  Design and implementation of (AAA with Local & Remote ACS Server, 802.1 x authentications, Proxy Authentication).  Design and Implementation of Microsoft Active Directory 2003 based on Microsoft best practices. Implementation of Anti virus Servers (Kaspersky, Sophos) in a medium sized company  Design and Implement SAMBA server using LDAP authentication for LAN users.  Design and Implementation of Send Mail Servers, MS Exchange e Server 2003/2007 based on Microsoft best practices.  Design and Implements SQUID 2.4, 3.1 Proxy Server based on Centos, Red Hat OS.  Implementation of different Network Performance monitoring tools such as (Cacti, Net Flow, Manage Engine OpUtils, SMonitor, Solar Winds, Nagios, JFF) to monitor WAN devices and different servers to optimize network resources and traffic.  Design and implementation of SIP on cisco voice gateways.  Design and implementation of MPLS VPNs  Support and Maintain Cisco Core Routers 7206VXR. 7600 Series, 2800 Series, small business series RV042, RV082 for vpn connectivity.  Supporting and Managing HEC Cisco Core and Edge Switching network.  Design and Implements SQUID 2.4, 3.1 Proxy Server based on Centos for differnet clients.  Deploy cacti, solar wind, cisco works Monitoring System to monitor Network and Bandwidth Usage.  Management of CAR on routers and switches by rate limited feature.  Design of Networking Infrastructure and resource sharing solution. The project covered the design of networking system, Servers, and applications in Windows 2003 environments. The project used TCP/IP as Network protocols and Star Topology.  Conduct Surveys on client sites and create project proposal and layouts for networks deployment and implementation.  Design and Implementation of BGP/MPLS, Traffic Engineering, Policy Based Routing PBR, Route Filtering, Redistribution, Route Summarization.  Catalyst IOS based Switches, VTP, STP, RSTP, Trunking, VLANs,  Layer 3 Switches, Logical Etherchannels, MLS.  IPSec, VPNs, AAA Model (RADIUS, TACACS+, Kerberos), Cisco PIX / ASA  Firewall, VPN Client, Juniper Firewall SSG5, SSG20  Design and Implementation of Incognito DHCP Server for assigning bandwidth to cable modem customers.  Media: Ethernet, FastEthernet, GigabitEthernet, FDDI, CDDI, Token Ring, ATM LAN Emulation.  Network Analyzers: Back Track 5 , Ethereal, Paketyzer, Radcom, Etherpeek.  Load Generator: Spirent Smart Bits, iperf, IPTraffic.  Leased lines 64k - 155Mb (PPP / HDLC), Channelized lines (E1 ), Fibre Optic Circuits, Frame Relay, xDSL, Load Balancing, Multi Homing, Satellite links. I also have extensive experience in following  Linux & Windows Integration in TCP environments  Expertise Linux Redhat, Ubuntu, SUSE, Centos, Debian, Slackware and Solaris Systems  Expertise in SQUID Proxy server. DNS Server, DHCP, Send Mail, Kerio Mail Server.  VMware ESX Server, Virtual Center, Distributed Resource Scheduling (DRS), VMware Data Backup , VMware Converter, VMotion, SVMotion, VHA, SVHA, FT, DRS, Power Management etc.

    $16.67 /hr
    154 hours
    4.71
  5. Hosam A.

    Hosam A.

    Telecom & IT Administrator

    Palestinian Territories - Last active: 1 day ago - Tests: 3 - Portfolio: 5

    From August 2006 - Present (Fusion Ltd. For Internet Services & Telecommunication Systems )  Voice: (2008 – present) ----------- Design, monitor, report, Configure, Implement, and support VOIP solutions as the following: o VOIP soft switch such like Genband SBC o Follow voice traffic with wholesale customers and suppliers with following their NOC tickets o VOIP SIP-Based application servers o Build calling card, voice over broadband services and offers using strong platform with combined services, including prepaid and postpaid o Related with Cisco voice products and use it in joining Toll free access numbers or in termination process o Related with Quintum Tenor AX, DX series o SIP / H.323 devices o IP-PBXs Switchvox Digium SMB and integrate it with customized customer support ticketing system o IVR service using Digium Appliance o Any VoIP media gateway (cisco, Quintum, grandstream, Linksys , ...)  Voice Carrier Relations: (2009 – Present) o Contact telecom and VoIP providers and make interconnection with them o Follow accounts , billing , statements and apply route testing o Use 3rd party solution for billing integrated to Genband SBC for some months  Networking: (2006 – Present) ---------------------------- o Deploy wired / wireless networks and support virtual private networks applied by fusion to (electricity company, Islamic university of Gaza , college university ) o Deploy WiMax wireless networks (a project built to UNRWA school , support 240 school ) and also have B.S inside company o Work with cisco routers o Install virtual machine data center using VMware vSphere 5.x and making clustering using vCenter and monitor VMs o Install Microsoft & Linux servers o Build DNS , Video Streaming ,Web , Mail server , … o Deploy cache server using WCCP and apply basic filtering with GRE and L2 via Cisco router. o Install Veeam backup system for virtual machines and vSphere  IT Automation Managed Services------------------------------------ o Kaseya IT Automation Solution for managing end user and corporate machines with automated schedule procedures like automatic windows installing, Kaspersky and AVG antivirus installing and scanning with automatic detecting and deleting of viruses.  Business Process Management:------------------------------------------ o ARIS Business Processes Management: which help companies and institutions to minimize the gap between AS-IS processes and business plan process, the software is auto-documented and help institutions to get the right position tasks with ability to change process and improve it  Power Networking Fields:-------------------------------------- o Configuring & installing BPL system ( Broadband power line communication ) o Configure and install AMR (Automatic Meter Reading) system for GDECo. – Project applied in 2007 o Also working to integrate passive fiber with BPL for new project (GPON/BPL)  Video:----------------------------------- o Related with video conferencing solution which focus on bandwidth consuming and provide SD/HD features with (whiteboard , file transfer, record video , document sharing ) o Use Microsoft expression encoder to build live stream solution o Working with E-learning and video conferencing solution integrated with moodle , an open source of course  Sales Engineer o Work with market team for promoting , advertising fusion campaigns , exhibition , web designs , companies relations o Work as sales engineer to sell fusion integrated services such like voice + internet, hosted solution, etc. .. Projects:  WiMax School Net –UNRWA 2007 - Work as Technical and System Engineer for deploy and install mini-towers in UNRWA schools - installing WiMax CPEs and configure it to the uB.S and align it - continue support UNRWA Engineer for WiMax Maintenance  AMR (Automatic Meter Reading ) – GEDCo 2007 - Install main controller unit in low voltage feeds - Connect 1 phase and 3 phase digital meters to it - Signing meters to the controller - Install AMR system to HQ office server - Connect AMR system with controller unit using WiMax as private network with Eth. To Serial converter - Learn GEDCo Engineer to how work with AMR solution from end-to-end  VoIP Project – Fusion 2008 - Its internal work which need to deploy and configure the following : a. Cisco VoIP gateway for connecting PRI as Access Toll Free numbers and for Termination b. Genband SBC for switching between calling card platform and suppliers c. SipHive Verscom Broadband and calling card platform d. GSM gateways like HyperMedia for customers e. Quintum Tenor for termination and origination  IP-PBX – Fusion 2010 - Deploy and configure Digium Switchvox AA305 - Installing PRI card and configure it - Installing FXO card - Configure extensions , groups , templates , access control , IVR , music on hold , recording , time framing ,

    $15.00 /hr
    131 hours
    5.00
  6. Luis Manuel Morales Colmenares

    Luis Manuel Morales Colmenares

    PENTAHO ETL & DATA Masking Specialist / IT Consulting

    Uruguay - Last active: 16 days ago - Tests: 2 - Portfolio: 2

    My name is Luis Manuel Morales. I’m Bachelor´s Degree in Computer Science from the Central University on Venezuela. At work I have more than twenty ( 20) years of experience in the IT world diversified into several areas: - Software Development, play the roles: Project Manager, Solution Architect , Senior Developer , DBA, Specialist Testing and Documentation Specialist. -Platform IT, play the roles: I have served as IT Manager , IT Coordinator and IT specialist ( specifically level platforms : Unix , Linux and Amazon AWS). -Quality assurance, ETL & Data Masking: play the roles : Coordinator and Project Leader for Data Masking , Designing ETL and Data Quality . My skills are aligned with developments as Leader WEB development using the various steps and concepts for software factories and level of management and project coordination . However i haver established experience as Senior Developer and IT Specialist , specializing in the following technologies: ETL, DATA MASKING, AMAZON (AWS, S3, EC2), LINUX, ASTERISK, HTML5, PHP, PERL, JSON ,RESTFUL, JAVA SCRIPT FRAMEWORKS (SENCHA EXTJS, JQUERY , EASYUI, DHTMLX), VOIP, SMS, Responsive Design (TWITTER BOOTSTRAP). DBA functions and support for databases: ORACLE, POSTGRES, MYSQL and MsSql. MVC (SMARTY TEMPLATES) and medium skills CMS (JOOMLA, WORPRESS). Control Version System (SUBVERSION, GIT, CSV). Project management tools (REDMINE, GANTTER, MSPROJECT, WBS-CHARTPRO, ENDEAVOUR). GENEXUS Developer (.net, java and smartdevices), System and developer for MOODLE Elearning platforms. My English level is good to write and average for conversation. My default language is Spanish and beginner level read/write of French. Objetive: - Data Security: ETL and Data Masking - CMS (Joomla or php based) - TV & Sports Media Software Integrator (Lyric Pro - Chyron & Deko) - Management Information Technology and Telecommunications. - Safety management logic (Systems and Telecommunications). - Management and Solutions Architecture Information Technology. - Planning, Development and Project Management. - Basesball and Sports Stats technologies Skills: - PHP. Level: Advanced, Years: 13+ - PERL. Level: Advanced, Years: 10+ - SQL. Level: Advanced, Years: 15+ - Linux. Level: Advanced, Years: 18+ - Postgres. Level: Advanced Admin and SQL, Years: 8+ - MySql. Level: Advanced Admin and SQL, Years: 12+ - Oracle. Level: Basic and SQL Advan, Years: 8+ - MSSQL. Level: Basic and SQL Advan, Years: 8+ - Asterisk. Level: Advanced, Years: 6+ - Pentaho. Level: Advanced, Years: 6+ - Data Masking. Level: Advanced, Years: 6+ - ETL. Level: Advanced, Years: 6+ - Unix Shell Scripting. Level: Medium, Years: 6 + - Subversion. Level: Basic, Years: 9+ - Java. Level: Basic, Years: 6+ My LinkedIn profile: http://ve.linkedin.com/in/lmmoralesc

    $16.67 /hr
    294 hours
    4.76
  7. Ambika P.

    Ambika P.

    VoIP,SIP,Asterisk,FreeSwitch,Opensips,Kamailio, Linux,MySQL,PHP,Apache

    India - Last active: 2 days ago - Tests: 6 - Portfolio: 5

    Over the last 4.5 years, I have developed a wide range of IT solutions including VoIP, Web and Mobile development for small businesses and startup companies as well as for large companies. I have experience in VoIP, FreeSwitch, Opensips, Kamailio, Asterisk, FreePBX, A2billing, Linux, Opensource Consulting, MySQL, PHP, Joomla, Android, asp.net-mvc, c#, .net-framwork etc. I have developed class4-class5 Soft Switches, SIP Proxy, FAX Servers, Fax2mail, Fax over IP, Messaging Servers, Session Border Controllers, IVR application, Web Applications and many others. My core competency lies in complete end to end IT solutions for VoIP, Web and Mobile technologies.

    $25.00 /hr
    1,502 hours
    4.58
  8. Max Ivanov

    Max Ivanov

    Russia - Last active: 23 hours ago - Tests: 3

    My main principles are: result-oriented way of thinking, excellent technical base to solve any case, to talk human language with non-IT people, make software for people with neat look and clear UI. I am web developer with 15 years of experience programming PHP, different SQL flavors, Javascript, HTML, using related tools as PHP frameworks, jQuery, Prototypejs, content management systems, version control systems, graphic tools and Unix systems. I have proven experience in development for financial/insurance market. Also I am systems administrator with 15 years of experience managing networks, server infrastructures and data-center operations across multiple platforms (Unix, Linux, Windows) and vendors (Cisco, IBM, HP, 3Com, Avaya). Effectively plan, install, configure and optimize the IT infrastructure to consistently achieve high availability and performance.

    $30.00 /hr
    41 hours
    4.97
  9. Mohamed Zain

    Mohamed Zain

    Sr Linux Systems Engineer | Dev/Ops | Open source integration Engineer

    Egypt - Last active: 1 day ago - Tests: 10

    +7 years experience install / manage and operate linux servers on a high scale machines infrastructure , open source solution consultancy using Nginx / PHP-fpm,MySQL,Kannel SMS Gateway,Memcache/Redis, Couchbase ,ElasticSearch / Solr Nagios/lcinga/munin, Puppet, Chef, Bash Scripting, PHP, Ruby, Vagrant, Docker , Git, AWS , VOIP, Asterisk also i have experience in load&stress testing and security vulnerability assessment

    $25.00 /hr
    71 hours
    5.00
  10. Md. Riadul Islam

    Md. Riadul Islam

    Linux,Asterisk,DBA,Android,PHP,HTML5,MVC,C#.NET,PhoneGap 5+Years

    Bangladesh - Last active: 19 days ago - Tests: 16 - Portfolio: 5

    Working for last 5 years on Linux Server Management, DBA, C#,SQL,.NET , ASP , PHP, VOIP Soft switch and numerous criteria of computer science. Also build Mobile Apps for android, cross-platform apps. Strong working background on Database, Relational Algebra, Algorithms and Network Topology. Continuously looking for new technology and updates.

    Groups: Application Developers Alliance, AspDotNetStorefront

    $16.67 /hr
    2,639 hours
    5.00