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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, 33 SIP projects are completed every quarter on Upwork.

33

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 4.51.

4.51
Last updated: August 1, 2015

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  1. Ali N.

    Ali N.

    Software Architect / Developer(C++, C#), Computer Science Reseracher

    Sweden - Last active: 11 days ago - Tests: 13

    I have several years of experience in developing Windows and Web based software, including Sharepoint, database, and industrial monitoring and control applications. I have used Visual Basic, C#, C/C++ (Win32/MFC/CLR/Linux), and Microsoft SQL Server 2000-2008 proffesionally to develop software solutions. I used advanced object oriented concepts and architecture patterns in software development. Moreover, I am a computer science researcher. My research fields of interest include computational neuroscience, neuronal networks, artificial intelligence, robotics, and computer software.

    $60.00 /hr
    64 hours
    4.18
  2. Junaid Rehmat

    Junaid Rehmat Agency Contractor

    Experienced C/C++/Objective C Developer/iPhone Application Developer

    Pakistan - Last active: 4 months ago - Tests: 3 - Portfolio: 5

    Over the last 4 years, I have developed a wide range of projects using C, C++, Objective C, and Java. My core competency lies in iPhone Application Development. I have developed more than 15 major applications, including VOIP applications, social networking apps, drawing apps and/or a few apps with custom UI and self management features. I have hands on experience in iOS Application Development. I have developed many live applications. - Expertise in iOS (6.x, 5.x, 4.x) - Expertise in xCode (4.x, 3.x) - Expertise in VOIP applications using PJSIP and Doubango. - Expertise in XMPP Framework. - Expertise in Facebook, Twitter and LinkedIn APIs - UIKit Framework - UIMapKit Framework - Addressbook Framework - QuartzCore Framework - CoreAnimation Framework - AudioPlayer/MoviePlayer Frameworks - Client‐Server communication - Database designing using SQLite - PDF document reading - Inapp Purchase integration - MessageUI and MailUI Frameworks - JSON and XML Parsing. - Using GET, POST and SOAP web services. - Using Gesture Recognizer and UITouch controls. - Customizing User Interface.

    Associated with: AgileOne

    $20.00 /hr
    1,512 hours
    5.00
  3. Nasir Bhutta

    Nasir Bhutta

    Dr, Programmer, Developer, security engineer

    Pakistan - Last active: 1 month ago - Tests: 3 - Portfolio: 9

    A software programmer with 7 - 8 years of programming in many different languages including c/C++, C#, VB, CB.Net, ASP.Net, Java, Python, Turbo Pascal etc. I have worked on many projects with many different clients from many different countries and in many different areas including Protocols, security products, APIs, Simulations, emulations, Web Development, Management Consultancies, Financial Consultancies, health care etc.

    $50.00 /hr
    0 hours
    0.00
  4. Chris Rivas

    Chris Rivas

    Hosting Industry Sr Linux Admin w/ RHCE, RHCVA, MySQL DBA, developer

    United States - Last active: 11/18/2014 - Tests: 7 - Portfolio: 1

    For more than ten years I have worked extensively in the software development and hosting industries. I am an expert Linux and Unix system engineer, and can deploy and configure any software stack that is based on Linux for optimal content delivery. I excel at MySQL database design, optimization, and administration. I am a seasoned software developer and have extensive experience with many languages including Java, Python, PHP and Ruby. I also have significant experience with customizing, deploying, and adminstering open source web applications, application frameworks, and application servers. I have worked locally, overseas, and with colleagues and clients overseas via the internet. If you look at my work history here, you will note that i 'disappeared' in February 2011. Indeed I did disappear, I was in a very bad car accident in Bangkok, Thailand, where I was living at the time, and was nto able to get out of bed or use a phone or computer for roughly a month. I now reside in Austin, TX again full-time I do not disappear typically, my present and previous employers can confirm that if you are hesitant based on feedback from 2011.

    $36.67 /hr
    22 hours
    4.54
  5. Isaac Thuku

    Isaac Thuku

    Isaac Thuku

    Canada - Last active: 03/02/2014 - Tests: 10 - Portfolio: 2

    I am a self motivated professional always working towards providing excellent tailored solutions for each of my clients to meet and whenever possible exceed their requirements, within budget and deadline. I have wide experience in desktop application development, installation, troubleshooting, repair and customer/technical support for Windows based Operating Systems and application, data entry and Web design.

    $5.56 /hr
    5 hours
    5.00
  6. Hector Bravo

    Hector Bravo

    IT Expert - Project Manager - PMP, ITIL, VCP, MCSE, MCDBA, VoIP

    Panama - Last active: 2 months ago - Tests: 13

    Design, Plan, Implement and Support for: - Windows Azure / Amazon EC2 - Microsoft Lync - Microsoft Sharepoint - Microsoft Exchange - Microsoft SQL Server - Microsoft Active Directory, ADFS - Microsoft Dynamics CRM - Windows Server / Hyper-V - Microsoft ISA/TMG/UAG - Microsoft SSCM, SCVMM, DPM - Microsoft Office 365 - Voice Integration with Lync - VMWare vSphere / ESXi - VMWare Site Recovery Manager (SRM) - Veeam Backup & Replication

    Groups: Microsoft Certified Professionals

    $33.33 /hr
    930 hours
    4.56
  7. Milind Gandhi

    Milind Gandhi

    C/C++ Expert Developer

    India - Last active: 5 months ago - Tests: 3 - Portfolio: 1

    Good experience on full life cycle of software development and active in the industry since August-2005. I have been working for reputed telecom companies since the beginning. I am super expert in C/C++ programming languages. Kindly look at my profile at internationally recognized Q&A website: http://stackoverflow.com/users/514235/iammilind Have mastered in writing elegant, clean, well documented and optimized code. Ubuntu-Eclipse-g++ is my primary dev environment. Also comfortable with MSVS. Can share my professional work history once contacted. You can utilize my expertize in various fields like programming, bug fixing, optimization and designing .

    $26.00 /hr
    270 hours
    4.78
  8. Yasir Star

    Yasir Star

    Network/System/PBX Engineer

    Pakistan - Last active: 3 days ago - Tests: 2 - Portfolio: 5

    I am Telecommunication Engineer. I have 04 years and 10 months experience in EPABX, IP Networking, IT, Telecommunication, SDH, IP Telephony, GSM, Optical Fiber Transmission. I also have experience in following areas: Computer Hardware/Software, Online Technical Support, Phone Support. I am Certified Engineer From Cisco and Alcatel-Lucent. I can work with Technical/Non-Technical Challenges. I can provide Online Support for given Task.

    $8.00 /hr
    0 hours
    0.00
  9. Yawar Hadi

    Yawar Hadi

    Voip, asterisk, perl scripting, freeradius, linux, mysql developer

    Sweden - Last active: 07/07/2012 - Tests: 3 - Portfolio: 3

    From last two years i am working on asterisk, free radius and mysql.I developed a full voip application which consist of * Calling Card Application * Soft phone to PSTN calls * DID to Soft Phone * DID to Forwarded no. * SIP to SIP calls * Call routing besides these i add the asterisk realtime functionality using mysql database and for billing i use the free radius server. So my core competencies are asterisk, perl, python, free radius, mysql DB and working on linux plat form.

    $8.89 /hr
    75 hours
    5.00
  10. Jamal H.

    Jamal H.

    Programmer /VoIP-IP-PBX & Linux Expert/Computer Networks & Security

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

    I have expertise in various programming and networking platforms. My VoIP Expertise are as following: VoIP: -SIP/H.323/SS7/TDM -Genband Nextone - Expert -Sonus and NBS Solution - Expert -MVTS Pro and MVTS II - Expert -Acme Packet - Sound proficiency -Asterisk PBX: Full proficiency -Strong knowledge of SIP protocol and SIP routers/proxy servers/SS7 -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVRs/Auto Attendant Development. -Wireshark - Expert Cisco Routing and Switching technologies. Centos/Fedora/Red Hat Enterprise Linux Various Billing 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) - vBilling (billing for Freeswitch) My Programming expertise are as following: -Web Applications Development in PHP and ASP.NET MVC5 -Desktop Applications in Java, C#.net (Windows Presentation Foundation) -Mobile Applications in Android -Database design in My-Sql and MS-Sql A research oriented mind, with strong problem solving skills. An avid reader, who loves to write about his area of interest (VoIP/Programming) and new emerging technologies in the field of Communications and Software designing.

    $20.00 /hr
    0 hours
    0.00