SIP Freelancers

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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, 34 SIP projects are completed every quarter on Upwork.


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.

Last updated: May 1, 2015

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  1. Petr Kudinov

    Petr Kudinov

    Russia - Last active: 2 days 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
    1,611 hours
  2. Jack B.

    Jack B.

    Asterisk/VOIP/Vicidial/FreePBX/Elastix Expert | Technical Support

    Philippines - Last active: 2 days ago - Tests: 1

    Over the past 6 years, I have installed and configured a total of around 1,000 seats call center system with a maximum of 14 servers on one site using Vicidial on both standalone and multi-server setup. I have also installed and configured IPPBX systems, VOIP systems, GSM gateway systems and asterisk-based systems using FreePBX and Elastix ranging from small to medium business enterprises including integration of IPPBX to a legacy PBX(PABX) and to CUCM. My core competencies lies in Asterisk, Vicidial, GoAutodial, Vicibox, FreePBX, Elastix, Linux, SIP, IPPBX and PABX/CUCM integration, VOIP systems and GSM gateway systems. Installing and maintaining VOIP and call center systems remotely to my clients in the US, Singapore, Philippines, China, UK and Middle East has also helped me improved my skills and the way I deal with people especially in interacting and communicating with top management or owners of the business. With this, I'm seeking opportunities to install, develop, configure and support call center systems, VOIP systems and IPPBX systems from the ground up for you or your business. I have also experience in the following areas: - MySQL and Apache - Linux(CentOS, Redhat, Ubuntu, Opensuse, Fedora) and Windows Operating Systems - Microsoft Office applications - Basic to advance TCP/IP networking configuration - Basic to advance troubleshooting(system, software, hardware and networking) - SDLC, UML Diagrams and OOP diagrams - FTP - Remote desktop support - Firewall and linux/shell scripting - Softphones(Eyebeam, Bria Xlite Zoiper and Ekiga) configuration - IP Phones(Mitel, Polycom, Escene, Grandstream, Yealink, etc) configuration - Video Phones(Grandstream, Yealink, etc) configuration - Operator phone configuration - FXO/FXS gateway configuration - VOIP gateways(Dinstar, Grandstream, Audiocodes, Quintum Tenor, Digium) configuration - Sangoma/Digium/Atcom/Openvox card configuration(TDM/Analog, E1, E1R2, PRI/BRI, ISDN) - Multi-tenant IPPBX

    $33.33 /hr
    51 hours
  3. Mohsen Hameed

    Mohsen Hameed

    Android, Embedded Programmer and Researcher

    United Arab Emirates - Last active: 12/09/2014 - Tests: 2 - Portfolio: 1

    I want to obtain a challenging position as a software developer in a company that will enable me to use my solid technical knowledge, strong embedded development skills and problem solving abilities. SPECIAL INTEREST: Design, Implementation of Software Mobile Application Development (Android, iPhone) Voice over Internet Protocol (VoIP) Telecommunication Networks

    $16.67 /hr
    348 hours
  4. Alexey A.

    Alexey A.

    Erlang/Web/NoSQL developer

    Russia - Last active: 8 hours ago - Tests: 1

    More than 20 years of Telecom/GUI/Embedded/Web programming experience. Main languages: Erlang, Js, C, Python Extra languages: Lua, PHP, TCL, Perl. Erlang skills: OTP, RabbitMQ, Ejabberd/MongooseIM, ChicagoBoss, Zotonic, Nitrogen, Cowboy, Riak, CouchDB, Erlyvideo/Flussonic, Tsung, Common Test, PropEr

    $44.33 /hr
    3,313 hours
  5. Julien Nguyen

    Julien Nguyen

    Computer Sciences Software Engineering, Networks and Telecomunications

    Vietnam - Last active: 10/19/2014 - Tests: 1

    Mr. Nguyen Anh Minh is currently R&D Manager of Computer Sciences Corporation. He earned B.Eng from HCMC University of Technology, major in Computer Science and Engineering in 2002. He obtained a Master of Science from the University of Paris Sorbonne UPMC, France in 2008. He then joined the Service Architecture Laboratory, Department of Wireless Networks and Multimedia Services, Telecom & Management SudParis until May 2010. He returned Vietnam and become a Lecturer in the Faculty of Computer Science and Engineering, Department of Systems and Networking till date. He left the HCMC University of Technology and joined the Computer Sciences Corporation (CSC) in February 2014. His areas of interest are Network protocols, Internet architecture, Distributed systems, Software Engineering and Mobile computing cloud. He has been selected for Gifted students for National Physics Olympiad in 1994 and won a Best Demo from the IEEE Pervasive Computing and Communications (PerCom) in 2009. He is also a Mathematical enthusiast, especially in Theoretical Computer Science. Finally, Mr. Nguyen Anh Minh is a Senior member of IEEE Computer Society and ACM Association for Computing Machinery. He is currently an active member within the IEEE Cloud Computing.

    $50.00 /hr
    0 hours
  6. Sujatha Ananthakrishnan

    Sujatha Ananthakrishnan

    Telecom specialist

    India - Last active: 1 month ago - Tests: 2

    For the past 15 years I have been in the telecom industry working speclizing in in the core like call processing , supplementary services , SIP and IMS .I have also handled the PGW of the LTE . The 15 years span included work in technical expertise , team management , project management and patent filing. I am looking out for online teaching of telecom concepts and free lance writing for technical articles. I have also filed few patents in the telecom sector and would take up related roles.

    $20.00 /hr
    0 hours
  7. Kenny C.

    VoIP Engineer

    United States - Last active: 07/03/2014 - Tests: 2

    I have been working in the ISP industry for almost 10 years with 5 years of engineering experience. I'm experienced with a variety of transports including MPLS, VoIP, LANs, WANs, VPNs and Layer 2 solutions. My main focus and passion is in VoIP, I have expert knowledge in SIP to PRI trunks across different platforms. I'm seeking opportunities with SIP/PRI deployments and designing VoIP capable networks. I'm able to provide a different outlook on networks from a provider perspective and can introduce methods of cutting costs in regards to VoIP services.

    $40.00 /hr
    0 hours