VOIP Software Freelancers

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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: 3 days 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
    164 hours
    5.00
  2. Dmitry Sytchev

    Dmitry Sytchev

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

    Russia - Last active: 7 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
    93 hours
    4.96
  3. Cuong Thai Huy

    Cuong Thai Huy

    XMPP/VoIP developer

    Vietnam - Last active: 18 hours 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
    559 hours
    5.00
  4. Mladen Stefanov

    Mladen Stefanov

    Systems Architect/Administrator

    Bulgaria - Last active: 18 hours ago - Tests: 9

    For 14 years dealing with IT technologies, I have gained wide range of experience and skills. Over the last 5 years I have specialized on providing following solutions for startup companies, small and enterprise businesses: • Responsible for high availability, continuity and transactional of the Production, Development, QA and Staging environments • Translating high-level requirements into low level system architecture • Understand and maintain at low level clients service propositions and requirements • Develop and implement DR, backup mechanisms and relevant procedures. • Develop and implement Clustered and fail-over infrastructures • Support of world-wide offices infrastructure and co-located infrastructure • Write and maintain procedures and policies. • Handle all issues reported by the clients I have worked with the following applications, operating systems and technologies: > Active Directory Domain, Certificate and Federation services > DB - MySQL/Oracle/MSSQL > OSes - SuSe/RHEL/Debian/Ubuntu/CentOS/Win2k3 /Win2k8 > Network equipment as Load Balancers, switches, FW, routers (Cisco ASA5510, DELL, Linksys, VoIP devices) > Virtualization (ESXi 3.5, 4.1, 5.1, XeN) > Claud services (AWS, DigitalOcean, RackSpace) > Storage SAN/NAS (EMC Celerra, EqualLogic, Synology Disk/Rackstation, PowerVault custom made storage servers ) > On-Line Storage block replication (DRBD) > Clusters and fail-over (Heartbeat, Pacemaker, Corosync) > Code review, Issue & Project Tracking software (JiRa/Confluence/Fisheye/Redmine) > Source code repositories (SVN,GiT) > VoIP (Asterisk PBX infrastructures) > Infrastructure monitoring (Zabbix, MRTG, custom scripts) My core competency lies in complete end-end develop and maintain of a infrastructure projects, and I am seeking opportunities to help by solving IT problems for you or your business.

    $33.33 /hr
    478 hours
    4.95
  5. Oleg Russkin

    Oleg Russkin

    Software Technical Support with Junior Python Java skills

    Ukraine - Last active: 1 month 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. Bazzi Ouissam

    Bazzi Ouissam

    network engineer

    France - Last active: 1 month ago - Tests: 9 - Portfolio: 1

    Bachelors of Networking Technologies,Over the last 5 years I have actively engaged in designing and implementing VOIP telephony related infrastructure which involved in installation, provisioning and commissioning of highly complex VOIP solutions using Asterisk, Elastix, Trixbox and Amazon AWS cloud telephony, Azure, HP Cloud, Rackspace and Digital Ocean Asterisk telephony installation. Provides call centre solutions using Asterisk, A2billing and Asternic. G729/G723 codec. I'm holding an industrial CCNA security, CCNA and CCNP certificates. I'm seeking opportunities to audit, build, configure or maintain a network for you or your business. I have experience in the following areas: Routing and Switching, Network Security, VoIP, VPN, Firewalls,IPS,IDS.

    $22.22 /hr
    0 hours
    5.00
  7. Kirill K.

    Kirill K.

    Russia - Last active: 1 month 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: 1 day 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
    285 hours
    4.98
  9. Karan Dua

    Karan Dua Agency Contractor

    Iphone developer

    India - Last active: 18 hours ago - Tests: 3 - Portfolio: 1

    I have 5 years of experience in IT industry. I have good expertise in iPhone development, HTML, CSS, Javascript, xCode, Cocoa Touch, Corona, Cocos2D, Sencha Touch, PhoneGap, RestKit APIs, Coredata, VoIP, XMPP, SIP Server, Jabber, java, eclipse, Social networking web services, Google web services,etc. I like to program. I like complex and diverse assignments that keep my mind sharp and allow me to constantly learn new things.

    Associated with: Logix Enterprise Solutions

    $22.22 /hr
    1,371 hours
    5.00