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Last updated: October 1, 2015

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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
106 hours

Darren Wiebe

Darren Wiebe

SysAdmin / Asterisk & FreeSWITCH Expert

Canada - Tests: 3 - Portfolio: 1

I am a highly effective systems administrator with10+ years of Windows, Linux, and FreeBSD experience. In the last few years I have also gained AS400 experience. 10 years of Asterisk knowledge including AGI programing in perl and PHP as well as Digium and Sangoma card configuration and troubleshooting. 3 years of experience with OpenStreetMaps. 4 years of FreeSWITCH experience. 18 years of network administrator experience.

$25.00 /hr
0 hours

Roman Yerin

Roman Yerin Agency Contractor

Web and VoIP(FreeSWITCH, WebRTC) engineer

Russia - Tests: 4 - Portfolio: 2

I'm a skilled software developer and VoIP engineer with more than 15 years of experience. I'm also a full-stack developer of the convergent systems of voip and web. Playing with Freeswitch, Kazoo, SipXecs, Ruby, Perl, JS(node.js), C/C++ and much, much more - I'm always choosing tools for the task. Probably the most important thing which differs me from others - I'm never working just to gain money. I'm always doing my best to reach your goal the fastest way possible. If you've chosen a non-optimal solution I'll correct it and suggest a more efficient way. I'm never promising something that you're probably expecting to hear instead of the realistic estimate of your project. I'm never lying to my clients and I'm always giving all the information I have - transparently and on a regular basis. In one word - you can trust me as you trust yourself.

Associated with: Coderunes

86% Job Success
$45.00 /hr
619 hours

mohammad kamruzzaman

mohammad kamruzzaman Agency Contractor

FreeSWITCH Expert with Web development Experience

Bangladesh - Tests: 2 - Portfolio: 2

i am a full stack web developer and server administrator (FreeSWITCH) i have experiences on Django (python), Codeigniter (php), MongoDB, ElasticSearch, postgres, redis, rabbitMQ, celery, mysql, nodejs. you can hire me if you need to implement a distributed VoIP enabled service based on freeswitch/kamailio that is ready to scale. i am also doing newfies-dialer customization and maintenance for a long while. and also i will take projects like PBX, IVR, autodialer development. i have open source project customization experiences, for example, FusionPBX,Newifes-dialer,Astpp,vBilling,kazoo, Kannel

Groups: Twilio

Associated with: DT software house

91% Job Success
$44.00 /hr
3,103 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

Gohar A.

Gohar A.

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

Canada - Tests: 3 - Portfolio: 15

Since last 8+ years 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 Designing and Development * Server Administration * Network Administration * Securing VoIP deployments * Expert at SIP and RTP diagnosis and troubleshooting I've experience in Following tools. * Asterisk * FreeSwitch * OpenSIPs * Kamailio * SEMS * Vyatta * MySQL * Linux OSs I've worked in following languages. * C++ * LUA * Perl * Php * Shell scripting Find More about Me from my VoIP Blog:

100% Job Success
$60.00 /hr
154 hours

Luis Urrea

Luis Urrea

Telecom Engineer | VoIP Network Engineer | FreeSWITCH | Kazoo Expert

Costa Rica - Tests: 5

I am a Telecom Engineer and Network Administrator with extensive experience in designing, implementing and maintaining mission critical network based systems. I worked for Cisco TAC for a little over 4 years providing high level technical support for Cisco Systems customers worldwide, diagnosing and resolving complex issues in small and large scale converged VoIP networks. My years of experience with multidisciplinary groups, and diverse network based equipment, using debugging tools and lab simulations have consistently trained my analytical skills and given me the required background to understand how systems work and therefore be able to provide solid recommendations and identify solutions that meet customer's needs. I am passionate about developing robust, scalable, distributable and fault tolerant communication systems and applications using the Erlang programming language. Programming proficiency in Erlang and Ruby.

$50.00 /hr
130 hours

Yuriy N.

Yuriy N. Agency Contractor

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

Russia - Tests: 1 - Portfolio: 1

Telecom Software and Network Engineer more than 7th 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

Dwibendu M.

Dwibendu M.

6+ Year Hands On Experience in Asterisk,Freeswitch,Vicidial,FreePBX

India - Tests: 3 - Portfolio: 6

Over 6 years hands-on experience. i have a great knowledge on VoIP Hardware and Applications from open source softswitches, MultiTenant PBX and predictive dialers (Asterisk, Freepbx,Elastix, Trixbox,Thirdlane, Vicidial, GoAutoDial,Os Dial,FreeSwitch,FusionPBX, BlueBox,ASTPP,A2Billing,Kazoo, Kamailio,Opensips etc)other VoIP gateways. Very strong Linux background with good understanding of PHP / Mysql and Asterik AGI / AMI fundamentals.Expertises in Digium, Sangoma,Allo,Openvox and other type of PRI & PSTN Card installation as well as VOIP Setup From Scratch. Expert in installation and configuration of Vicidial,Avatar Dialer and Newfies Voice broadcasting dialer and integrating it with Vtiger and sugar CRM. I have at least currently total of 500 IP-PBX server deployments and also do provide VoIP termination services. I work as a part-time consultant for a number of VoIP companies in the India. I have a broad knowledge about networking and wireless. this includes routers, firewalls, access points. I also do hardware/software troubleshooting and web designing (wordpress) and basic programming (c,php, html and perl) I am confident that i can deliver any work satisfaction guaranteed.

$11.11 /hr
21 hours