VOIP Software Freelancers

Browse VOIP Software job posts for project examples or post your job on Upwork for free!

VOIP Software Job Cost Overview

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

Upwork VOIP Software Jobs Completed Quarterly

On average, 44 VOIP Software projects are completed every quarter on Upwork.

44

Time to Complete Upwork VOIP Software Jobs

Time needed to complete a VOIP Software project on Upwork.

Average VOIP Software Freelancer Feedback Score

VOIP Software Upwork freelancers typically receive a client rating of 4.51.

4.51
Last updated: June 1, 2015

Popular VOIP Software Searches

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  1. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 1 day 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
    132 hours
    5.00
  2. Cuong Thai Huy

    Cuong Thai Huy

    XMPP/VoIP developer

    Vietnam - Last active: 1 day ago - Tests: 9 - Portfolio: 1

    Excellent understanding of XMPP from client to server. I have implemented XMPP client for web app (using Strophe), android app (using Smack), desktop app (using libjingle). On ejabberd, I have implemented many modules that defines own presence, iq, message, even I can define own stanza. Execellent understanding WebRTC. I have implemented Linux application that uses XMPP or Websocket for signaling and WebRTC for media transport to establish p2p audio&video call. Source code of Android WebRTC application are public on github (https://github.com/cuongth/AppRTCDemo). In these days, I spend free time on Cowboy server.

    $22.00 /hr
    429 hours
    5.00
  3. Irfan Ahmad

    Irfan Ahmad

    Expert of Web Design & Development

    Pakistan - Last active: 5 days ago - Tests: 2 - Portfolio: 44

    Over the last 7 years, I am in VoIP applications development & administration as well as developed wide range of web based application and websites using Groovy n Grails, Wordpress, Yii-Framework, PHP, HTML, CSS3, Ajax, jQuery, Javascript, SQL, MS Access, MySQL, Adobe Photoshop and integration of payment gateways. My core competency lies in VoIP applications including development, configuration and administration and worked for 5 international VoIP businesses. I also achieved more than 80 international startup and small businesses for websites design and development. I have strong hold in designing graphics including business cards, letterheads, flyers, newsletter and other graphic work. I am seeking opportunities to build websites from the ground up for you or your business. I also have experience in the following areas: Integration of payment gateways, Integration of custom APIs, SVN, Tomcat, Intellij, Netbeans, Dreamweaver and Adobe Photoshop. My professionalism, skills and knowledge make me an exceptional choice for your projects.

    $14.44 /hr
    903 hours
    4.62
  4. Dmitry Sytchev

    Dmitry Sytchev

    Asterisk/Freeswitch/Kamalio expert, VoIP engineer, Linux administrator

    Russia - Last active: 21 days ago - Tests: 7 - Portfolio: 1

    I have more than 10 years of experience in installation and support of carrier-grade VoIP services based on Asterisk, OpenSIPS, Kamailio, Freeswitch and proprietary SIP/VoIP software. My professional interests are Callcenters, automated dialer systems and integration of VoIP software with company information flows. You can rely on my strong engineering and programming skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analysis, security and fraud prevention. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco AS5300/5500, Audiocodes Mediant 2000, Quintum Tenor). I have experience in setup, administration and security of Asterisk, FreePBX, Elastix and FreeSWITCH PBX installations. As a programmer I use PHP, Javascript (both client-side using jQuery and Angular.js and server-side with node.js), Perl (system scripts/applications, Mojolicious webapps). I also have experience in development and administration of MySQL and Microsoft SQL Server databases. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security, including HA solutions (heartbeat/pacemaker). I use Zabbix and have some experience with Nagios and other monitoring software. I can also offer you consulting support in VoIP and network technologies.

    $33.33 /hr
    88 hours
    4.96
  5. Oleg Russkin

    Oleg Russkin

    Software Technical Support with Junior Python Java skills

    Ukraine - Last active: 16 days ago - Tests: 2

    Experienced Technical Support guy, problem resolver. QA skills: QA core courses. Selenium IDE, basic web driver. Bug trackers - Jira, Mantis, Redmine, Bugzilla - bug reporting, installation on aws ec2, running through their web interface. SQL basics. Java skills: Pre-core (basics cycles, threads, io) JavaRush, level 20 (online courses with practical approach, like codecademy). Fast learner. Fast searcher. Basic knowledge of HTML, PHP. Advanced pc user (using windows, linux. macos, aws ec2 - ssh,ftp, console). Main education and work experience: Pharmaceutical technology engineer - execution of high responsibility tasks, drawing up specifications, plans, protocols, organization of facility manufacturing process. Master of quality assurance - drawing up validation and qualification documentation, holding qualification and validation events, choosing appropriate equipment and finding/contacting dealers/manufactures. (On plants, producing medical products for human and veterinary use) English-to-russian translations, commonly technical.

    $20.00 /hr
    298 hours
    5.00
  6. Alexandro Conde

    Alexandro Conde

    Linux/Unix Server and VOIP/Network Administrator, PHP/Perl Developer

    Mexico - Last active: 2 months ago - Tests: 6

    I have been Linux/Unix Server Administrator (RHE, Centos, Debian, Solaris) for several companies since 1998, for 10 years I Install, Setup and Manage all the servers and Networking Equipment for all the services (Email, Databases, WebApplications, VoipApplications, CPE-provisioning, Monitoring, Security and VPNs) in a VOIP Company always having the security and availability in mind. I'm organized and can work well with people in other countries talking and writing in English or Spanish. I also develop projects in LAMP, Shell scripts and Backup process. My skills are always growing as every project have new challenges and I like to keep my own records of how I did the work.

    $27.78 /hr
    0 hours
    5.00
  7. Kirill K.

    Kirill K.

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

    Thank you for viewing my profile! I am a software developer with 4 years of experience in C and C++ development for Windows and Linux platforms. Here are language, systems etc. I have an extensive knowledge of: C\C++, Python, MySQL, Voip (configurating and developing modules for kamailio, yate), development linux kernel modules.

    $20.00 /hr
    6 hours
    5.00
  8. Oleg K.

    Oleg K. Agency Contractor

    Senior VoIP/Linux/Network Engineer (dCAP, CCNA, ITIL certified)

    Russia - Last active: 17 days ago - Tests: 6

    I am a Senior VoIP/Linux/Network Engineer (dCAP, CCNA, ITIL certified). I do have experience and offer my services in these areas: VoIP: Asterisk, FreePBX, Elastix, A2billing VoIP Security & Tuning VoIP Integration Network Administration: Cisco, HP System Administration: Linux (expert), BSD*(proficient) Network Monitoring & Management: Zabbix, Cacti, NOC Mail services: Postfix, Exim, Dovecot, Cyrus, Spamassassin Virtualization: Qemu/KVM, OpenVZ, Proxmox High availability: VRRP, CARP, DRBD, GFS2, GlusterFS, cman, Pacemaker Common services: DNS, DHCP, File Sharing, NAT, iptables, ipfw Scripting: Bash, Python Web servers: Apache Database servers: MySQL, PostgreSQL Etc…

    Associated with: NemBit

    $36.00 /hr
    282 hours
    4.98
  9. Eugene Z.

    Eugene Z. Agency Contractor

    C#, VB.NET, ASP.NET MVC, Web/Win Forms, WPF, MVVM, WCF, WebServices

    Ukraine - Last active: 1 day ago - Tests: 5 - Portfolio: 13

    Over 8 years of experience as a software developer. Participated and developed wide range of projects using .NET, C#, VB.NET, Windows/Web Services, ASP.NET /MVC. I'm rather communicative, active and reliable person. Have active life position and always tries to keep myself updated in new technologies. I'm very interested in development of different kind applications on .NET platform. Also I always ready to study something new. The level of my English is good. I have used to take part in verbal conversations with the customers and their remote teams. Have an experience working in team of developers with the ability to work as a team member, to lead and to follow, depending on the situation and responsibilities assigned to.

    Groups: Application Developers Alliance

    Associated with: EaZySoft

    $33.33 /hr
    2,617 hours
    4.97