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, 39 SIP projects are completed every quarter on Upwork.

39

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 4.48.

4.48
Last updated: July 1, 2015

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  1. David Bennent

    David Bennent

    Tinder-Like Mobile Dating App Developer

    Switzerland - Last active: 1 day ago - Tests: 4 - Portfolio: 13

    From the last 4 years, I have been involved in Tinder-style Dating Mobile Apps development especially in iOS and Android projects, using GoogleMaps, MapKit, XMPP, Openfire and etc. I am very familiar with Chat/Messenger/Messaging apps development. My Tinder-style dating apps include all these important functions. My expertise in Deliver the Quality of Apps in Required Time Frame. My key skills and abilities include (NOT limited to) + Text messaging and video/voice chatting - XMPP, OpenTok, Pusher, APN, VOIP/SIP + Networking framework - AFNetworking, Web RTC, Socket.io TCP/IP + iOS SDK (Foundation, UIKit, Core Data,AVFoundation, MoviePlayer,Quartz Core,Core Animation, etc) and iOS programming languages (X-code, Swift, Objective-C) + Map integration(GPS Location) /Google Map API, MapKit Framework + e-Commerce payment system - Paypal, Authorize.net, Stripe, Saleforce, card.io + ad serving or ad network SDKs (iAds, Google admob, etc) + Web service integrating - JSON RESTful API, Parse.com + Team Work - SVN, GitHub, Bitbucket + Various library development using C/C++

    $55.56 /hr
    47 hours
    5.00
  2. George M.

    George M.

    Expert in VOIP, expierenced in Asterisk,webrtc2sip,sipml5, MVTS,jquery

    Ukraine - Last active: 1 day ago - Tests: 6 - Portfolio: 9

    My web site is: www.a4business.com I am creating turn-key VOIP platforms for online bussines with WEB-site, different billings, rates setup, VOIP dialers, mobile dialers, DIDx provider integration, paypal online payments for Calling card business, DID and other. I have expierence in VoIP, Sysmaster/VoiceMaster brands. Demo: www.norfa.com, ( ask me for PIN ) Video lessons: https://vimeo.com/user36231282/videos Also, I had expierence with Nextone, Asterisk, freeswitch, iTelBilling, iTelByteSaver, iTelSwitch, Billbery, Alepo, MVTS, a2billing, freepbx, opensips, kamalio, PHP programming (php-agi, css, jquery), Linux advanced administration, kernel, bash, perl, SQL database architecture: Mysql, MSSQL, Sybase, SQLite, PostgreSQL, Cacti, MRTG, RRD, WHMCS customization, system Backup/Restore schemes. Also I install everything which is needed for business - mail exchange servers (Zimbra, Zarafa, Roundcube Webmail), Ticketing CMS (WHMCS) and write custom modules for each.

    $25.00 /hr
    6 hours
    4.99
  3. Anton Stremovskiy

    Anton Stremovskiy

    Junior iOS Developer & VoIP Engineer

    Ukraine - Last active: 1 month ago - Tests: 3 - Portfolio: 1

    More than 10 years experience in IT engineering. 1 year experience in Objective-C developing. Extensive experience in Linux & Unix systems. Deep practical knowledge VoIP Telephone and PBX Integration. Motivated team player with excellent communication skills. Expertise of working with internationally distributed teams. Fast learning and self-educating. Willing to travel as needed.

    Groups: Corona Labs

    $22.22 /hr
    0 hours
    5.00
  4. Oscar Chris

    Oscar Chris

    Mobile Messenger, Social Photo/Video Sharing Developer

    Sweden - Last active: 10 days ago - Tests: 8 - Portfolio: 17

    My Strongest Skills are Streamming Media Services, XMPP & OpenFire, Backend API's programming, Google Map SDK, FourSquare, Audio/Photo processing, Payment Processor(including In-App_Purchase), Analytics SDK. My major work is to develop the Wechat/Whatsapp Style Mobile App. My expertise in Deliver the Quality of Apps in Required Time Frame. My key skills and abilities include (NOT limited to) + Text messaging and video/voice chatting - XMPP, OpenTok, Pusher, APN, VOIP/SIP + Networking framework - AFNetworking, Web RTC, Socket.io TCP/IP + iOS SDK (Foundation, UIKit, Core Data,AVFoundation, MoviePlayer,Quartz Core,Core Animation, etc) and iOS programming languages (X-code, Swift, Objective-C) + Map integration(GPS Location) /Google Map API, MapKit Framework + e-Commerce payment system - Paypal, Authorize.net, Stripe, Saleforce, card.io + ad serving or ad network SDKs (iAds, Google admob, etc) + Web service integrating - JSON RESTful API, Parse.com + Team Work - SVN, GitHub, Bitbucket + Various library development using C/C++

    $55.56 /hr
    3 hours
    5.00
  5. 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: 8

    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
    987 hours
    4.97
  6. Luong Thanh Phu

    Luong Thanh Phu Agency Contractor

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

    Vietnam - Last active: 1 day 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
    4.73
  7. Vahram M.

    Vahram M. Agency Contractor

    Expert of Streaming Technology for iOS | Android | WP

    Armenia - Last active: 1 month ago - Tests: 4 - Portfolio: 2

    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