OpenSIPS Freelancers

Showing 17 freelancers

OpenSIPS Freelancers

Showing 17 freelancers

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

    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 intergration of VoIP with … more

    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 intergration of VoIP with company information flows. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco, Audiocodes Mediant). 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 use my strong technical and project management skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analytics and fraud prevention. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security. I can also offer you VoIP/SIP technical consulting support.  less

    voip-administration asterisk freeswitch opensips cisco-routers mysql php angularjs node.js linux-system-administration 00 more less
    • $55.56 HOURLY RATE
    • 4.9
    • 4 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 6 TESTS
  • Java/Perl/ Linux/Voip/Asterisk/Opensips

    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 … more

    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 a00s.com. 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.  less

    perl asterisk opensips java 00 more less
    • $27.78 HOURLY RATE
    • 5.0
    • 418 HOURS
    • BRAZIL
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 1 TEST
  • European system/VoIP administrator - Linux, VoIP, LAMP, Cisco, Amazon

    After 15+ years in system administration, I can say, I can help with any problem you could have. I was implementing clusters (http, asterisks, opensips), design and install high available infrastructure, finding bottlenecks in applications including resolution, design, install and … more

    After 15+ years in system administration, I can say, I can help with any problem you could have. I was implementing clusters (http, asterisks, opensips), design and install high available infrastructure, finding bottlenecks in applications including resolution, design, install and manage VoIP infrastructure with thousand of customers and mainly, bringing new ideas into life. Areas of knowledge: - Apache/HTTPD - installation, tuning, design of infrastructure - NGINX/HAPROXY - balancers, high availability infrastructure - PHP/MySQL - tuning for best throughtput - Asterisk - extensive administration for VoIP provider - Opensips - loadbalancing+high availability in voice services All this on Linux (Debian, CentOS, Ubuntu) and FreeBSD. - all type of clustering/virtualization - Xen, vmware etc. - all operations, scalability and high availability - Amazon/Rackspace - high available setups, hacks for automated deployment etc., about 50 instances under my management With all technologies, I was working with many companies, mainly from US and Canada. Everywhere, I was the person, on which main responsibility laid. My biggest advantage is, that I am working, until problem is not resolved - I am not blaming anybody, but working. Do you want to try it? Go ahead and drop me a line.  less

    apache-administration mysql asterisk opensips php nginx haproxy rackspace-cloudservers amazon-ec2 amazon-web-services 00 more less
    • $21.11 HOURLY RATE
    • 4.2
    • 4 HOURS
    • SLOVAKIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 3 TESTS
    ASSOCIATED WITH:
  • VoIP & Web Developer

    Best Service, Best time, Best choice I am a VOIP developer with more than 3 years. I have worked on many opensource like Asterisk, Kamailio, Freeswitch ... I have create many system voicemail, call center, sms from small to huge. I … more

    Best Service, Best time, Best choice I am a VOIP developer with more than 3 years. I have worked on many opensource like Asterisk, Kamailio, Freeswitch ... I have create many system voicemail, call center, sms from small to huge. I have using many API to VOIP prject like Tropo, Plivo, Twilio, Vitelity ... I also a web developer with strog skills in PHP, Python, Java, .Net ... I have used many frame work like Wordpress, Magento, Django, Codeigniter...  less

    asterisk python c++ django-framework openvbx freepbx opensips twilio-api tropo c php tcp-ip wordpress voip-software voip-administration 00 more less
    • $15.00 HOURLY RATE
    • 4.8
    • 307 HOURS
    • VIETNAM
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 4 TESTS
    GROUPS:
  • Asterisk/voip/a2billing/freepbx/kamailio expert

    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 … more

    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 a2billing.org 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.  less

    asterisk opensips a2billing freepbx virtualization linux-system-administration sql amazon-ec2 mysql sip trixbox elastix perl c++ python php css html xml windows-administration postgresql paypal-integration centos openvz xen-hypervisor 00 more less
    • $67.77 HOURLY RATE
    • 5.0
    • 444 HOURS
    • UKRAINE
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 6 TESTS
    ASSOCIATED WITH:
  • VOIP and Open Source Professional

    Asterisk/Kamailio/Elastix/FreePBX/Trixbox/Vicidial Professional. Worked on numerous projects on open source deployments like asterisk / kamailio (openser) based voip solutions, networking solutions like firewalls, utms, routers ( cisco/juniper) configuration with vlans, mail servers, web servers in the past … more

    Asterisk/Kamailio/Elastix/FreePBX/Trixbox/Vicidial Professional. Worked on numerous projects on open source deployments like asterisk / kamailio (openser) based voip solutions, networking solutions like firewalls, utms, routers ( cisco/juniper) configuration with vlans, mail servers, web servers in the past 7 years. Apart from this worked on joomla components, opencart customisations/ deployments, Emailer softwares like Interspire, Amazon Web Services, etc. Other work areas are Network designing/troubleshooting/security using open source tools like iptables/iproute for bandwidth management/ firewalling, vpn solutions like openvpn, ipsec tunnels, pptp vpn deployments.  less

    linux-system-administration mail-server-implementation openvpn firewalls joomla amazon-web-services email-marketing asterisk freepbx vicidial opensips network-administration cisco-routers 00 more less
    • $20.00 HOURLY RATE
    • 5.0
    • 17 HOURS
    • INDIA
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 4 TESTS
  • Voice over IP Developer

    - Design, implementation and deployment of VoIP services for various open source platforms including Asterisk, FreeSWITCH, and OpenSER. - Implementation of Database connection pooling using unixODBC and MySQL Proxy. - Call rate web service for Vopium SIP client applications using LAMP. - Design and … more

    - Design, implementation and deployment of VoIP services for various open source platforms including Asterisk, FreeSWITCH, and OpenSER. - Implementation of Database connection pooling using unixODBC and MySQL Proxy. - Call rate web service for Vopium SIP client applications using LAMP. - Design and implementation of High Availability Linux Cluster, providing Failover for SIP users. - Development and bug fixing of call routing and billing services using Asterisk and Perl AGI’s. - Inbound Call center setup using Asterisk. - OpenSER Stress Testing using SIPp and WinSIP for SIP and PSTN terminated calls. - Mutiple DB connection handling for AGI failover Skills: C/C++/ Asterisk/OpenSIPS/Freeswitch, PHP, Python, Perl, MySQL  less

    asterisk opensips freeswitch linux-system-administration perl python tcp-ip vicidial mysql a2billing 00 more less
    • $11.11 HOURLY RATE
    • 5.0
    • 0 HOURS
    • UNITED ARAB EMIRATES
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 3 TESTS
  • VoIP/Asterisk specialist

    My target research area is Open Source VoIP systems, mainly based on Asterisk. I have expertise in ViciDIAL, FreePBX, A2Billing systems, VoIP distros like TrixBOX, Elastix, AstLinux. In 5 years I have developed systems like pre-paid systems, callback, outbound dialers … more

    My target research area is Open Source VoIP systems, mainly based on Asterisk. I have expertise in ViciDIAL, FreePBX, A2Billing systems, VoIP distros like TrixBOX, Elastix, AstLinux. In 5 years I have developed systems like pre-paid systems, callback, outbound dialers, contributed number of patches to Asterisk project. I have experience in SQL, Ajax, Python. Interested in deep studying Ruby(Adhearsion), Python, FreeSWITCH, Kamailio.VoIP protocols: SIP, MRCP, ISDN BRI, E1 (PRI/SS7/R2), IAX2, RTSP, RTP, RTCP  less

    asterisk sip php mysql freeswitch opensips linux-system-administration javascript css voicexml c++ 00 more less
    • $44.44 HOURLY RATE
    • 4.8
    • 176 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 4 TESTS
    ASSOCIATED WITH:
  • VoIP Engineer

    I have 8 years of experience with VoIP. Troubleshooting of networks, VoIP networks and unix servers. SIP, MGCP, Linux Asterisk Opensips Vicidial goautodial Call centers setup VPS

    asterisk opensips vicidial voip-software sip network-administration call-center-management software-debugging perl linux-system-administration unix-system-administration technical-support technical-analysis 00 more less
    • $30.00 HOURLY RATE
    • 5.0
    • 6 HOURS
    • PORTUGAL
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • LINUX/RHEL/CENTOS/AWS/RHEV/NETWORK/VOIP/RHCA/RHCSS

    -More than 8 years of Linux administration experience -Proficient knowledge of RHEL / CenOS -Experience with Amazon Web Services. -Experience working with RHEV-M/H -Able to design and implement a large variety of services. -RHCS based clustering. -High troubleshooting skills. -Certified RHCA, RHCE, RHCSS and RHCDS

    clustering linux-system-administration security ldap lamp-administration mysql postgresql php asterisk opensips drupal wordpress 00 more less
    • $22.22 HOURLY RATE
    • 5.0
    • 14 HOURS
    • CZECH REPUBLIC
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 8 TESTS
    ASSOCIATED WITH:
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