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OpenSIPS Job Cost Overview

Typical total cost of Upwork OpenSIPS projects based on completed and fixed-price jobs.

Upwork OpenSIPS Jobs Completed Quarterly

On average, 3 OpenSIPS projects are completed every quarter on Upwork.


Time to Complete Upwork OpenSIPS Jobs

Time needed to complete a OpenSIPS project on Upwork.

Average OpenSIPS Freelancer Feedback Score

OpenSIPS Upwork freelancers typically receive a client rating of 4.87.

Last updated: October 1, 2015

Popular OpenSIPS Searches

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alexander Merkulov

alexander Merkulov Agency Contractor

Asterisk/voip/a2billing/freepbx/kamailio expert

Ukraine - Tests: 6 - Portfolio: 5

My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I not like to do something that not need be done, i prefer use developed components and solutions. That not mean i can't do development. I working with different programing tasks for last 26 years. yes, from 6 y.o. I live in it. So i prefer do something new&interesting; I can handle all tasks from linux administration/virtualization upto end-user web for voip. Only task i never do - graphical design part. That is not my field, better hire someone else for design. I have university degree, working with asterisk from start of this project. Have developing experience with freepbx/trixbox&a2billing. I am one of contributor of trunk. Also i can work as mysql/postgres DBA, database architect, has experience with following languages: Perl Python PHP C/C++ Javascript SQL Prolog/Lisp,Forth. In voip i can work with callweaver, asterisk, opensips, kamailio. Developed modules for freepbx, elastix, trixbox, a2billing.

Associated with: UA Prime Agency

92% Job Success
$67.77 /hr
546 hours

Sergey P.

Sergey P.

VoIP and Linux Engineer

Russia - Tests: 5

OS: linux (gentoo, debian, centos ...), FreeBSD over 10 years using/administration Lang: perl, lua, shell (java, ruby, erlang studying) VoIP: asterisk, freeswitch, gnugk, kamailio/ser (over 7 year administration) PBX: Si2000 (v.5), Definity administration (SS7, ISDN) DB: mysql, postgresql Sec: DMVPN, IPsec, OpenVPN Publish: LaTeX

100% Job Success
$30.00 /hr
76 hours

Tushar Jain

Tushar Jain

Voice & Data Consultant

Australia - Tests: 2

Tushar is a seasoned professional with 11+ years of experience in managing network operations in a service provider / NOC environment. Experienced & Skilled in Telecoms, MPLS, BGP, VoIP, SIP, Network Support and Managed Services, Remote Network Monitoring, Networking Services, Carrier Services , Telephony Services, IT Managed Network Services, Remote NOC Support. With an In depth design, implementation and support experience in Integrated network management system, Prepaid billing system, Switching, VOIP & Telephony services, SIP Trunking and many more areas, he brings with him a wide experience and has proven to be of great value to all the organizations and clients he has worked for.

$22.22 /hr
0 hours

Ziadi M.

Ziadi M.

Expert Linux System Engineer

France - Tests: 1 - Portfolio: 1

I am a hands-on, competent Linux system engineer with 4 years’ experience. I have a strong performance background in wide variety of professional Linux system support including monitoring, configuration, troubleshooting and maintenance. I have worked on numerous projects from concept to completion. A specialist in LAMP and VOIP platforms, I take pride in administrating Linux systems and regularly refresh my skills to ensure I keep up with ongoing developments and new technologies.

$10.00 /hr
0 hours

Dmitry Sytchev

Dmitry Sytchev

Asterisk/Freeswitch/Kamalio expert, VoIP engineer, Linux administrator

Russia - Tests: 7 - Portfolio: 1

I have more than 10 years of experience in installation and support of carrier-grade VoIP services based on Asterisk, OpenSIPS, Kamailio, Freeswitch and proprietary SIP/VoIP software. My professional interests are Callcenters, automated dialer systems and integration of VoIP software with company information flows. You can rely on my strong engineering and programming skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analysis, security and fraud prevention. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco AS5300/5500, Audiocodes Mediant 2000, Quintum Tenor). I have experience in setup, administration and security of Asterisk, FreePBX, Elastix and FreeSWITCH PBX installations. As a programmer I use PHP, Javascript (both client-side using jQuery and Angular.js and server-side with node.js), Perl (system scripts/applications, Mojolicious webapps). I also have experience in development and administration of MySQL and Microsoft SQL Server databases. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security, including HA solutions (heartbeat/pacemaker). I use Zabbix and have some experience with Nagios and other monitoring software. I can also offer you consulting support in VoIP and network technologies.

100% Job Success
$33.33 /hr
104 hours

Arsen S.

Arsen S.

VoIP Administration & Development

Bulgaria - 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 Full proficiency in free Billing/CDR 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) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. 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. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -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 es-crowed and both parties have agreed with working terms.

100% Job Success
$55.56 /hr
193 hours

Thiago M.

Thiago M.

Java/Perl/ Linux/Voip/Asterisk/Opensips

Brazil - Tests: 1 - Portfolio: 1

Last 14 years I worked as Internet Provider admin, with linux and perl in Brazil. I worked for 2,5 years as Voip Engineer with asterisk, openser and opensips in Australia. Worked for 1,5 years in Japan with Flex, now, I'm back to my home in Brazil, with my family working with Flex and Java at my new company We make software ERP to manage money and accounting for business companies. At my free time I like to discovery things by programing, some times with stock markets, some times like now, looking for math formula for prime numbers. I'm looking for some freelance job to increase my incomming, Once I want to go again to japan in this 2013.

$27.78 /hr
418 hours

Rai Icasiano

Rai Icasiano

Frontend and Backend Developer


Currently leading a team of developers Trained developers to enable them to handle web projects Lead and implemented SCRUM methodology for the team Handled web-based projects as well as Pragmatic RESTful API design and implementation Have been an instructor for 1 semester on Web Programming Concepts Experienced in the following languages/technologies: Backend - VOIP(openSIPS for load-balancing, Asterisk for PBX) - PHP - Perl - Node Frontend - HTML - CSS - Javascript - Jquery - Angular Testing Tools: - Apache Benchmark(load) - JMeter(load and endpoint testing) - PHPUnit Others: - Linux-based platform: Debian/Red-Hat - Web Server Deployment and configuration: - Apache - Nginx - SSL - SSI - Databases - MySQL - Postgres - MongoDB - Deployment of Gitlab - Google Analytics - Deployment - Event Tracking - Goal Flows - Security: - Signed Requests implementation - OAUTH 2.0 implementation

$11.11 /hr
0 hours

Thanh T.

Thanh T.

VOIP, Django developer

Vietnam - Tests: 2 - Portfolio: 2

I have more than 5 years experience in VOIP, as a system administrator, and a Django developer. I have done many projects relate to VOIP. I have developed some web conference, Web Portal, Commercial for VOIP service. Hosted PBX. I am very familiar with Asterisk, FreePBX, Freeswitch, FusionPBX, Kamailio, Siremis, Elastix, OpenFire, Trixbox, VICIdial, Newfies Dialer. I am very hard working and have strong knowledge in these technologies.

$18.89 /hr
76 hours