SIP Freelancers

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

SIP Job Cost Overview

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

Upwork SIP Jobs Completed Quarterly

On average, 34 SIP projects are completed every quarter on Upwork.

34

Time to Complete Upwork SIP Jobs

Time needed to complete a SIP project on Upwork.

Average SIP Freelancer Feedback Score

SIP Upwork freelancers typically receive a client rating of 4.50.

4.50
Last updated: May 1, 2015

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  1. Basit azeem S.

    Basit azeem S.

    OCPJP, Expert in Spring/Hibernat/Java/JEE based Projects

    India - Last active: 1 day ago - Tests: 6 - Portfolio: 10

    I am having 6+ years of professional experience in Design and Development of Java Technology based Desktop and Web Applications starting from Requirement Gathering phase to Testing and Delivery Phase. I have worked with giants like Tech Mahindra, Ericsson etc. as Software Engineer. Right now I am Sr. Software Engineer in a US based company where I am involved in design and development of various Web based projects on financial and telecom domain. My Skill set include - Core & Advanced Java, J2EE, Struts 1&2, Spring (All Modules), MVC 1&2, JSP, Servlets, JSTL, EJB, JSF, SIP Servlets, Web Services, Hibernate, MySql, Oracle, PL/SQL, JQuery, AJAX, DHTML, GWT. I worked extensively on many servers like JBoss, Sailfin/Glassfish, Tomcat, Weblogic on Windows and UNIX environment. I extensively worked on Eclipse and Netbeans and well aware of many Eclipse plug-ins like Debugger, JUnit, SVN/HG Plugin, WTP etc. I have good experience is SCM packages like GIT (GitHub, BitBucket), SVN, Mercurial (Hg). I am well versed with several build tools like MAVEN, ANT.

    $27.78 /hr
    2,100 hours
    4.76
  2. Petr Kudinov

    Petr Kudinov

    Russia - Last active: 20 hours ago - Tests: 4

    I'm professionaly programmer from 1997 (started on Pascal/C/FoxPro). Other the years i've developed billing systems for mobile operator and ISP, websites and very specific VOIP services. I have configured and supported many of the FreeBSD/Linux servers using Puppet/SaltStack. At this time i'm developing WEB applications using Angular JS or other JS engines on frontend and PHP on backend. I'm have good skills in software design, Javascript/PHP/PERL/C and SQL languages, as well as TCP/IP, HTTP, SIP, H.323, RTP. VCS - GIT/SVN

    $45.00 /hr
    1,613 hours
    5.00
  3. Suren Karapetyan

    Suren Karapetyan

    Senior System/Network Administrator (devops)

    Armenia - Last active: 20 hours ago - Tests: 8

    An ambitious *nix System and Network Administrator with eight years' experience working in ISPs and other service providers maintaining existing and designing new infrastructure. DevOps skills which help to bridge sysadmins' and developers' teams. Master's degree in Math Sciences. I'm looking for interesting projects which use new/young technologies and provide new challenges. Would also be great to work with interesting people.

    $35.56 /hr
    806 hours
    4.91
  4. 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
    126 hours
    5.00
  5. Md. soliman F.

    Md. soliman F.

    OpenCart / WordPresss / eCommerce / Responsive Professional Developer

    Bangladesh - Last active: 20 hours ago - Tests: 8 - Portfolio: 40

    <OpenCart / eCommerce / Extensions / WordPress -- For any development you are always welcome. Ask anything that you have need for your eStore. Take lifetime support after development.> My skills and experiences are following - OpenCart Any custom functionality - OpenCart extension customization to add new functionality. - OpenCart, WordPress, OsCommerce,Magento, custom php-mysql project - OpenCart theme from the scratch - OpenCart store 100% functional to go live from PSD or JPEG design. - OpenCart store 100% functional to go live from HTML web site - OpenCart custom extension creation for your store. (With VQMOD or Without VQMOD) - OpenCart theme customization & installation. - WordPress Theme from the scratch - WordPress site customization,add advance plugins. - Web Service, Ajax, XML, JSON, RSS - MySQL, HTML, HTML5, PHP, JSP, CSS,CSS3, java script, jQuery <--Top Quality and Tight Deadline is my main personality in Developing.--> <However, If for any reason you are not pleased with my product then I will be happy to refund full money from you> Dear Hiring Manager, Thank you for taking the time to look at my resume.I am an Honest young programmer, I am from Bangldesh. I think when you are outsourcing for a contractor to complete your project, trust is very important, without trust, you have nothing.If you are looking for a reliable contractor to finish your project on time, then look no further, you have found the right person. -------Client Satisfy Perfectly -------Top Quality -------I do not exceed agreed budget. -------I do not exceed deadline.. I will always make best effort to satisfy clients requirements.I will always provide best result for clients. Kind Regards Soliman

    $15.00 /hr
    1,757 hours
    4.90
  6. 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
  7. Tom Thomas

    Tom Thomas Agency Contractor

    CTO -14 Yr Exp - C++ ,QT/VC++,COM,C#, Rasp PI,Plugin,Dev Driver,SNMP

    India - Last active: 1 day ago - Tests: 6 - Portfolio: 6

    I am a 15 year experienced Professional C/C++/VC++/C#.NET/Java/ASP.NET Developer with Design and Management Experience. My core competency lies in the end to end development of C++ (especially VC++ and QT C++) and C#.NET based applications. I also have very good experience in managing a team of size 5 to 25. I helped many start-ups to make their dream a reality and I am happy to say that most of my customers are repeat customers. My oDesk profile and customer feedback reflects exactly the same story. Please go though my oDesk work history for more details. I am willing to work on both Fixed Price ( Milestone Based) as well as Hourly based Projects. The key skills which distinguishes me form other developers are given below. VC++/ATL/COM, Raspberry PI,Android, Device Driver, Video Streaming,DirectX, SNMP, Protocol Development, Plugin development, Plugin Frameworks, Artificial Intelligence,Video Analytics, Scientific and Engineering Software, Computer Interfacing software. RESUME ==================== => More than 14 years of commercial software development experience with exclusive focus on Client Server/ Networking/Graphics/Robotics Technology. => In-depth knowledge in developing softwares with tools and technologies like VC++, Unix/Linux C++, .NET , C#.NET, VB.NET, ASP.NET and Java.' TECHNICAL EXPERTISE ==================== => The key technical Architect behind the Shareware products, KTS InfoMate, VideoManager +, MoneyCare +, SalesMate +, KTS InfoMate, CampusMate + and other products (with Plug-in Support) developed with tools VC++, ADO, MFC and ATL => The key Architect behind the extensible Web Content Management and Backup system KTS webCloud developed with tools VC++,VC#.NET, ASP.NET and SQL Server. => Worked for fortune 500 companies and MNC clients like GE, HP, Fujitsu,Toshiba, Hitachi, ISO. End To End Software Products Development Experience ============================================ Digital Signage Management Software (Tools and Technologies VC++, COM, ActiveX, QT C++, C#.NET, Java, ASP.NET, Web Services, Android , Linux, Raspberry PI, Windows, SQL Server/ MySQL, MS Access, Cross Platform ) Personal Accounting Software (Tools and Technologies : VC++, MFC, ATL , COM) Point of sales Software (Tools and Technologies : VC++, MFC, ATL , COM) Web Content Management System Software Framework (Tools and Technologies : ASP.NET, C#.NET ) Time Table Creation Software (Tools and Technologies : VC++, MFC, ATL , COM) Video Rental Software (Tools and Technologies : VC++, MFC, ATL , COM) Campus Management Software: (Tools and Technologies : ASP.NET , MySQL) Software Skills: Software Product Engineering, VC++, ATL, COM, DCOM, MFC , ActiveX, DirectX, DirectShow, FFMPEG, FFDShow, Win 32, .NET, C#.NET, VB.NET, ASP.NET,ASP, AutoIT, Bugzilla, ISAPI, Boost, Device Driver, NDIS Driver, Printer Driver, ModBus TCP, ModBus Protocol, SNMP, CMIP, HTTP,SMTP, FTP, TFTP, HTTPS, RTSP, SAP, SIP, H 264, MP4, MPEG2, AVI, Video Streaming, Flash Streaming, RS 232, USB, Firewire, Image Processing, Packet Sniffer, Ethreal, Video Analytics, Object Tracking, Aforge.NET, Vehicle Identification, Medical Imaging, Optical Networking, Mathematics, Physics, Game Physics, Simulation, Scientific Software, Linux , Unix C++, ObjectStore, SQL Server, MySQL, MS Access, Web Services, SOAP, gSOAP, JSON, Compiler, Lex,Yac, ASM, Data Structure, Fiber Optics, Embedded System, Raspberry Pi, Plugins, Excel Plugins, Office Plugins, Word Plugins, Plugin Framework, PhotoShop Plugins, Photoshop SDK, 3DS Max Plugin, Intelligent Transportation Systems, New Port Stepper Motor, Galil Motion Controllers, CRO, EDBA, WDM, SONET, SDH, SEO, SEO Tools Development.

    Associated with: KTS InfoTech Pvt Ltd, KTS InfoTech Private Limited, Santhisoft Technologies

    $40.00 /hr
    964 hours
    4.97
  8. Vahram M.

    Vahram M. Agency Contractor

    Expert of Streaming Technology for iOS | Android | WP

    Armenia - Last active: 12 days ago - Tests: 4 - Portfolio: 7

    My profession is: SIP, RTP, RTMP, XMPP protocols; VP9, VP8, H.265, H.264, Opus, Speex, AMR, GSM, G.7xx Video and Voice encoding and transmission; OpenFire, Red5, Asterisk, OpenSips Servers; TLS, SSH, RSA security; TCP and UDP sockets, Tunneling, TCP over UDP. My experience in software development is 15+ years. Last 6 years I am working in mobile application development, especially with Video Chat, Audio Calling, Instant Messaging and other Multimedia solutions.

    Associated with: Be Interactive

    $33.00 /hr
    6,500 hours
    4.76
  9. Luong Thanh Phu

    Luong Thanh Phu Agency Contractor

    Delphi,Web.NET, PHP, RoR, C/C++, Android, IOS, VoIp, OpenCV

    Vietnam - Last active: 3 days ago - Tests: 17 - Portfolio: 9

    - I am programmer with over 15 years experience work in area IT software, Web development and Security network (All platform OS Window/Linux/MacOSX) - I am strong coding with languages programming (C/C++, Objective C, Java, Delphi/Pascal, Php/Perl/Python/Ruby, Javascript/Applescript/Shell script, C#/VB.NET. - Delphi Programming: (Component, RemoteObject, Fastreport, Report Builder, Raise report, dbExpress, dataSnap, network, Firemonkey, crossplatform IOS, MacOSX, Window) - GIT/SVN in tracking and manage source code - Developing and using well with frameworks, opensource from .net, WinSDK, Linux SDK, IOS SDK, Social API(facebook, google, dropbox..etc), OpenCV, Forge, Image Processing, DSP, OCR, gstream, phonegap, - Web developement: Php, ruby, python, perl, NodeJS. Framework: joomla, wordpress, yii, Zend, drupal, SugarCRM, vTigerCRM,,,..etc. - Mobile/Smart device and Embedded development: Android, Linux Embedded, IOS, Window Mobile Embedded, Window Phone - IDE and tools programming(Visual Studio, Delphi IDE - all version, eclipse, Qt Creator, Netbean - Database programming: MS SQL(2000,2008, 2012), MySQL, MongoDB, NoSQL, BigData, postgreSQL, Firebird, Oracle - VoIP development: Asterisk, Softphone, WebRTC, Freeswitch, OpenSips, Elastix, FreePBX, A2Billing, XMPP, OpenFire, Call Center I joined to developing and completed many large project. i will show to you all previous my works.

    Groups: Bluehost Developers and Designers, Crossrider...

    Associated with: KPT

    $15.56 /hr
    4,646 hours
    4.67