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, 29 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 4.47.

Last updated: October 1, 2015

Popular SIP Searches

Clear all filters

Vijay singh R.

Vijay singh R. Agency Contractor

Expert in SMS gateways (Twilio, Plivo), OpenVBX, SIP

India - Tests: 8 - Portfolio: 8

A results-driven, customer-focused, articulate and analytical Software Engineer . Strong in design and integration problem solving skills. Expert in Twilio,NopCommerce,C#,,ASP.NET 3.5/4.0/4.5, MVC 4.0, WCF, SQL Server 2000-2008-2012, JavaScript, HTML, AJAX and web 2.0 best practices.Expert in working on payment gateways like PayPal Integration and Various API integration. **During my development experience, I have abundance working experience with SMS API integration and development projects in .NET and PHP where I have implemented functionalities like: - Inbound/Outbound Call/SMS - Group SMS - Call recording - Call forwarding - Reporting etc.. I also have hands on experience in the following areas: MS Technologies, Ajax, Jquery, OOPs, and software design. •Worked in technologies provided by .Net Framework like Web applications, ASP.NET, AJAX. •Have worked on various market standards and followed best practices like XML, CSS, JavaScript, Jquery. •Have worked on web application that follows 3-tier architecture. •Good experience in Database design and SQL Server 2005 including developing stored procedures, taking database backups and restoring them. •Having good skills in converting business problems into technical solutions. •Having good ability in learning new things and applying them at work. •Having good experince in communicating with clients and understanding requirements. •Having good skills in team management, distribution of taks, project management.

Associated with: Kindlebit Solutions Pvt. Ltd.

86% Job Success
$14.00 /hr
2,215 hours

kashyap patel

kashyap patel Agency Contractor

7 Year Experience In VoIP,SIP,Asterisk,Elastix,VICI,A2Billing,Tribox,

India - Tests: 6 - Portfolio: 13

Installation Expertises in Asterisk, Freeswitch, vicidial, astercrm, A2billing, Free PBX, Elastic etc. IVR specialist in asterisk Advanced Dialplan in asterisk Useful and cost-effective phone management system planning & designing & installation Expertises in Digium, Sangoma, Openvox and other type of PRI & PSTN Card installation. Connecting Multiple Asterisk Server & Cloud Solution for asterisk Call centre setup using vicidial Advanced Voice broadcast system Training on Asterisk Advanced Call Recording Solution using Asterisk Specialties Asterisk, Freeswitch, vicidial,A2billing, Free pbx, elastic, PRI & PSTN card installation, call centre setup, Advanced IVR, Cloud solution using asterisk, training on asterisk, voice broadcast etc.

Associated with: Kingasterisk technologies

39% Job Success
$16.67 /hr
26 hours

Kirill P.

Kirill P.

Asterisk Expert and System Administrator

Russia - 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.

100% Job Success
$25.00 /hr
47 hours

Suren Karapetyan

Suren Karapetyan

Senior System/Network Administrator (devops)

Armenia - 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.

97% Job Success
$45.00 /hr
1,162 hours

George M.

George M.

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

Ukraine - Tests: 6 - Portfolio: 9

My web site is: 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 experience in Asterisk, Sysmaster/VoiceMaster brands ( Demo:, ( ask me for test PIN ) My video lessons: Also, I had big 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.

62% Job Success
$25.00 /hr
8 hours

Nikolay R.

Nikolay R.

Software Developer

Russia - Tests: 4

My main skills are: - Operating systems: Windows, Linux, iOS - Programming languages: C/C++, PHP, Java, ActionScript 3.0, JavaScript, Ruby. - Protocols: IP, TCP, UDP, SIP, SDP, RTP, RTCP. - Tools: MS Visual Studio, Eclipse, phpMyAdmin, XCode, ANTLR, Sikuli. - DBMS: MySQL, PostgreSQL. - Libs and APIs: Flex 4.0, Cocos2d-x, jQuery, WinAPI, Alternativa3D, SDL, WebRTC, Rails. - VCS: Git, SVN

$27.78 /hr
0 hours

Yuriy N.

Yuriy N. Agency Contractor

Freeswitch/Asterisk/OpenSIPS/Kamailio/Linux/Network/VoIP Enthusiast

Russia - Tests: 1 - Portfolio: 1

Telecom Software and Network Engineer more than 6th years in companies - communication providers. I have extensive experience with deploying a complete infrastructure of voip provider, using OpenSource telephony technologies such as freeswitch, asterisk, OpenSIPS\Kamailio, kazoo, etc. Mostly I'm dealing with emerging startups or with small but accomplished voip companies which want to improve\reorganize their infrastructure; create something new or fix some issue on their network. So it is main area but sure I can help with other projects that correspond to my list of skills.

Associated with: Nasida

100% Job Success
$40.00 /hr
1,118 hours

Abdelghafour H.

Abdelghafour H. Agency Contractor

Software developer

Morocco - Tests: 4

I'm a network, software developer, I have consequent experience in LAN/WAN protocol's configuration, I worked also on setting up and configuring IPTV and VoIP platforms, I developed many WEB architecture using J2EE, Ruby On Rails, Python Django and NodeJS. My goals through upwork is to create a trust based network of clients with whom, I can have a long term relationship developing solutions that best suit their needs.

Associated with: Teliteck

100% Job Success
$33.33 /hr
1,357 hours

Vahram M.

Vahram M. Agency Contractor

Expert of Streaming Technology for iOS | Android | WP

Armenia - Tests: 4 - Portfolio: 2

My profession is: WebRTC, NaCl, XMPP, SIP, RTP, RTMP 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

100% Job Success
$33.00 /hr
6,525 hours