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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, 45 VOIP Software projects are completed every quarter on Upwork.

45

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 4.55.

4.55
Last updated: August 1, 2015

Popular VOIP Software Searches

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  1. Norbert V.

    Norbert V.

    C#, ASP.NET MVC, Java, Android, C/C++ developer

    Hungary - Tests: 6 - Portfolio: 9

    I have been developing applications for 4 years in C#, ASP.NET MVC, Android, Java and C/C++. During this time I managed to get skills to write robust and optimal code in these languages and frameworks. I have a deep knowledge in networking concepts, protocols, VoIP technology and different database systems. I have worked with different Linux/UNIX systems and Windows so far. I used design patterns several times in practice, used TDD principles, set up continous integration and builder systems for larger projects. Why hire me: work efficiently, deliver on time, write maintainable code, provide good code analysis, learn new things fast.

    $24.89 /hr
    487 hours
    4.95
  2. Karan Dua

    Karan Dua Agency Contractor

    Iphone developer

    India - 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
  3. Truong Viet Ha

    Truong Viet Ha Agency Contractor

    VoIP & Web Developer

    Vietnam - Tests: 6 - Portfolio: 6

    ============================================================================== VOIP and Web developer with more than 4 years experience. ============================================================================== On VoIP field: ------------------------------------------------------------------------------------------------------------------------ + I have strong skills on Asterisk, Kamailio, FreePBX, FreeSWITCH. + My favorite languages: Python, C++, PHP + I also used to VOIP API like Tropo, Vitelity, Twilio, Plivo, OpenTok ... + Using webRTC for many realtime communication projects On web developing field: ------------------------------------------------------------------------------------------------------------------------ + I have strong skills on HTML/CSS, JS, NodeJS + I used some web framework like: Wordpress, Django, Codeigniter, Meteor ... Team management: --------------------------- Currently I am project manager of Designveloper JSC, with 18 developers and 2 designers.

    Associated with: Designveloper

    $25.00 /hr
    1,472 hours
    5.00
  4. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - 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
    183 hours
    4.54
  5. Jakob A.

    Jakob A.

    audioalgorithms.com - Senior Audio Signal Processing Engineer

    United States

    Are you looking to hire an audio expert ? I specialize in audio signal processing algorithms. I work for clients all over the US and they are very satisfied with the work I do for them (references available upon request). A short summary of my profile: - Expert in audio engines for VOIP (cross platform) - Background in hearing/audio science and audio for VOIP - Open to freelance projects or full time positions for companies in the US (remote work with occasional visits to HQ) - Independent contractor working on freelance projects for clients (companies in the audio domain) in the U.S. and in Europe. - CPUs: Intel, ARM, ADI Blackfin BF51x /SHARC21469 - Platforms: Windows Desktop, Windows Phone 8, iOS/OSX, Android, Linux - Specialist in Audio Engines for VOIP - Specialized in audio signal processing and math - General knowledge: Software Engineering, Telecommunication, Mathematics/Physics, Digital Signal Processing - 12+ years of programming in C (can do C++ as well) and MATLAB - C# (2+ years) - Objective C (1 year) - Java (1 year) - IDEs: MS Visual Studio, ADI VisualDSP, Eclipse, XCode, MonoDevelop/Xamarin - Frameworks: Android SDK/NDK, Cocoa, Windows Phone 8 SDK, .NET, WebRTC Audio Components - M.Sc. EE degree (2006). Major: Digital Signal Processing. Minor: Math/Physics (No Computer Science background!) - Acoustic echo cancellation - Noise suppression - Audio signal analysis/synthesis - Debug/Test - Adaptive filters - Audio equalization - Audio resampling - Tone generation/detection - Voice engine algorithms - Speech detection - Voice morphing - Time stretch algorithms - Audio codecs - Adaptive jitter buffer - Packet loss concealment - Floating point to fixed point translation - VOIP, SIP, RTP - Speech analysis/synthesis - Audio Pattern Search Audio Drivers: WASAPI, openSL ES, portaudio Audio Codecs: SILK, iLBC, G711, SPEEX, G729, G722 and many more Some experience with video codecs like x264

    $88.89 /hr
    49 hours
    5.00
  6. Alexander Etreta

    Alexander Etreta

    iOS \ Android \ Xamarin Developer

    Russia - Tests: 1 - Portfolio: 9

    I'm well-skilled engineer based in Moscow, Russia. I'm working with Xcode, Xamarin (MS VS or Xamarin Studio on Mac), Objective-C, C, C++, C#, Java, Cocos2D, Unity. I also work with a perfect interface designer, a true professional. In work I use all the benefits of IOS and Android systems and provide my clients with the best possible solutions. My motto is - simple and beautiful solutions for your business. For long-term and complicated projects I can involve a team of professional ios\android developers, my colleagues. Ready to engage in serious, complex projects, games (cocos2s, Unity 5) etc.

    $34.00 /hr
    33 hours
    5.00
  7. Anatoliy B.

    Anatoliy B.

    C/C++ Windows/Linux software developer

    Russia - Tests: 4 - Portfolio: 3

    More than 7 years developing software for VoIP and about 12 years of experience in programming for various platforms and systems. I've got wide experience in: - C/C++(C++11, Boost, Qt) - signaling protocols SIP, MEGACO and ISUP/SS7 - configure and create modules for Asterisk, FreeSwitch, YATE, Kamailio - development under the ARM and MIPS CPUs - programming 2D/3D graphics - Windows and *nix programming

    $20.00 /hr
    239 hours
    5.00
  8. lee daniel

    lee daniel

    3 Amazing Developer Apple Watch | iOS | Android

    China - Portfolio: 2

    Hi, Dear My Potential Clients! My goal is to make You Win in the IT world. With all of my competencies and creativity, I work hard to deliver an Excellent Competitive Solution to you. The long involvement in web development allowed me to have rich and deep insight into every aspect of web technology. My skill set is based on a strong combination of good education along with rich development experience and would be always up-to-date with new technologies. As a freelancer, my goal is to be a valuable developer who could add real value to my clients. Your SUCCESS is my SUCCESS! Let's WIN-WIN in IT world. I look forward to a long term relationship with you based on trust. Thank you for reviewing my profile.

    $38.00 /hr
    0 hours
    5.00