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 Sheikh

    Basit Azeem Sheikh

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

    India - Last active: 12 hours 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
    2,029 hours
    5.00
  2. Petr Kudinov

    Petr Kudinov

    Russia - Last active: 1 day 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
    1,540 hours
    5.00
  3. Hector Bravo

    Hector Bravo

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

    Panama - Last active: 8 days 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
  4. Md. soliman F.

    Md. soliman F.

    OpenCart / WordPresss / eCommerce / Responsive Professional Developer

    Bangladesh - Last active: 3 days 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
    1,749 hours
    4.90
  5. Gohar A.

    Gohar A.

    VoIP Consultant [Asterisk, freeSWITCH, Kamailio, OpenSIPs, Vyatta]

    Canada - Last active: 1 month ago - Tests: 3 - Portfolio: 14

    Since last 7 years now I'm involved intensely in end-to-end VoIP setups. That included pre-deployment 360 degree Architecture planning. Actual development of the projects, including aiding other teams develop the exact required component for the projects. And after deployment Support. My career objectives are to be a very flexible expert capable of working on almost any layer. Come up with intelligent solutions to help achieve business goals smartly. I'm proficient in following domains * VoIP * Server Administration * Network Administration I've experience in Following tools. * Asterisk * FreeSwitch * OpenSIPs * Kamailio * SEMS * Vyatta * MySQL * Linux OSs I've worked in following languages. * C++ * Perl * Php * Shell scripting Find More about Me from my VoIP Blog: http://saevolgo.blogspot.com

    $60.00 /hr
    152 hours
    4.99
  6. Suren Karapetyan

    Suren Karapetyan

    Senior System/Network Administrator (devops)

    Armenia - Last active: 1 day 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.

    Groups: Upwork Verified Web Developers

    $35.56 /hr
    737 hours
    4.91
  7. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 8 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 SQL -MySQL/PostgreSQL - design, maintenance and optimization of databases -NoSQL: MongoDB Various Billing solutions and GUI: -A2Billing: Full proficiency (configuration from scratch, customization) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime for Asterisk and FreeSWITCH) -vBilling (billing for FreeSWITCH) -FreePBX: GUI for Asterisk -Fusionpbx: GUI for FreeSWITCH 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. Terms: Hourly based projects: -Current hourly rate is $40. Fix price projects: -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 escrowed and both parties have agreed with working terms.

    $55.56 /hr
    110 hours
    5.00
  8. Victor Gil

    Victor Gil

    Experience Android Developer / Expert Windows Developer

    Venezuela - Last active: 15 days ago - Tests: 5 - Portfolio: 5

    I am a software analyst and developer with more than 10 years of expertise in the area. I work with the following programming languages: Visual Foxpro, C#, VB .Net, PHP, HTML5, Javascript, Java, Delphi. I have developed applications for a big range of purposes, from a regular invoicing app to an instant messaging communication for mobile devices. I have knowlegde of: CSS3, MySQL, MSSQL, Silverlight, MVC, WCF, WPF, LINQ, ADO.NET, XMPP, Openfire (XMPP Server), Ubuntu, Gentoo, Office, Scirra Contruct2 (Game Development), Unity3D (Game Development), GIMP, LibreOffice, Wordpress. Right now my main interest is to work on mobile applications, can it be via HTML5 or native languajes. If you have any questions, please send me a message and I will answer ASAP.

    Groups: Corona Labs

    $20.00 /hr
    14 hours
    5.00
  9. Kirill P.

    Kirill P.

    Asterisk Expert and System Administrator

    Russia - Last active: 29 days ago - Tests: 10

    I work on IT more than 12 years. VOIP/Asterisk Developer, Expert System Administrator and Network Administrator, Perl Programmer. Generally, I develop solutions based on Asterisk and speech technologies (speech synthesis and speech recognition systems), complex IVRs, integration with external sources and databases, custom click-to-call and callback systems, etc. I prefer custom development for Asterisk and FreeSWITCH. Usually, I use Perl for development. I have huge experience in solutions based on Asterisk such as FreePBX, Elastix, Trixbox, vicidial, etc. Also I support critical 24x7 systems, administration networks and servers, perform IT consulting, etc.

    $25.00 /hr
    10 hours
    5.00