VoIP Developers สำหรับการจ้างงาน

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  • จ้าง mula9211
    5.2
    20 รีวิว $20 USD ต่อชั่วโมง
    I have provided a wide range of IT solutions including VoIP Software, Websites & Mobile Apps development for small businesses and start-up companies as well as for large enterprises. I have expertise in VoIP/SIP, FreeSWITCH, FusionPBX, ASTPP, OpenSIPs, Kamailio, WebRTC, MediaProxy, RTPproxy, RTPengine, Asterisk,...
    I have provided a wide range of IT solutions including VoIP Software, Websites & Mobile Apps development for small businesses and start-up companies as well as for large enterprises. I have expertise in VoIP/SIP, FreeSWITCH, FusionPBX, ASTPP, OpenSIPs, Kamailio, WebRTC, MediaProxy, RTPproxy, RTPengine, Asterisk, FreePBX, A2billing, Linux & OpenSource Consulting, MySQL, PostgreSQL, PHP, Yii, Apache, Nginx, Android,Odoo I have developed following VoIP and IT solutions: - Click to call -Odoo servers - Class4 & Class5 Soft Switches - SIP Proxy & Redirect Server - SIP Load Balance & Fail-Over - IVR Application - Fax over IP (FoIP) - T38 Supported FAX Server - Voice broadcast ring less/conventional - SIP Messaging Server - High scalable Least Cost Routing(LCR) with Fail-Over - Session Border Controller(SBC) - RESTfull API - Web Services & API for Mobile Application - Android Mobile Apps I have been supporting various termination equipment/hardware like -TELES -2N -ANTRAX -DINSTAR -GOIP ย่อ
  • จ้าง kzaouli05
    5.1
    12 รีวิว $25 USD ต่อชั่วโมง
    Telecom/WebHosting/Voip/PBX/System administrator, +15 years of experience in Installing, configuring and managing Systems, Asterisk, Autodialing, FreePBX, Vicidial, GoAutodial, A2billing, IVR, Voice to Mail, Predictive Dialing, Calling Cards(PIN), Voice/SMS BroadCasting, WebRTC, WebPhone, WSS. As a company, we are...
    Telecom/WebHosting/Voip/PBX/System administrator, +15 years of experience in Installing, configuring and managing Systems, Asterisk, Autodialing, FreePBX, Vicidial, GoAutodial, A2billing, IVR, Voice to Mail, Predictive Dialing, Calling Cards(PIN), Voice/SMS BroadCasting, WebRTC, WebPhone, WSS. As a company, we are a SIP VoIP Provider with competitive rates and the HIGHEST availability levels within multi Systems integration for large traffic. We offer VoIP multi-systems installation packs, multi machines and deliver "All in one unified solution" to support large traffic, billing system , Trunks management, users payment gateways, reports, recordings, security and Web SIP Registration/Login portal. Depend your needs, startup, medium, large usage, welcome to the game. Regards, Kamal zaouli ย่อ
  • จ้าง AbrahamBU
    5.5
    29 รีวิว $20 USD ต่อชั่วโมง
    *Dedicated Freelancer* 9+ Years Robust Experience as a Lead Engineer. Master in VoIP Platforms and Integration with other components of OSS/BSS, Telecom Networks and CRM products. CCIE Level Network Knowledge and Robust Telecom Experience. (NOC Manager) Expert in WebRTC and Asterisk along with a deep...
    *Dedicated Freelancer* 9+ Years Robust Experience as a Lead Engineer. Master in VoIP Platforms and Integration with other components of OSS/BSS, Telecom Networks and CRM products. CCIE Level Network Knowledge and Robust Telecom Experience. (NOC Manager) Expert in WebRTC and Asterisk along with a deep understanding and experience in Signalling and Media protocols, furthermore in Secure calling and Media encryption. Having 100++ successful setup and integration, I am fully familiar with every single issue or bugs you may face in WebRTC related projects and Asterisk. I am also experienced with Mobile Network Infrastructure as well as OSS/BSS platforms in Carrier WiFi, Carrier VoIP and general concept of Mobile Data Offloading. I did also managed to run a massive ISP with +500000 customer base and +200000 live users. hands on experience on various VoIP/Network tech and devices Ability to train, motivate and supervise a team Kindly please contact me for more details. ย่อ
  • จ้าง abusayed2004
    6.0
    44 รีวิว $30 USD ต่อชั่วโมง
    Work 9 years on server security, cloud, AWS, OpenStack, VoIP, Asterisk, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, OpenStack, Mysql Red hat, Python, PHP scriptwriter for IVR and AGI implementation on asterisk, have a good team for support and further development. Puppy Linux...
    Work 9 years on server security, cloud, AWS, OpenStack, VoIP, Asterisk, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, OpenStack, Mysql Red hat, Python, PHP scriptwriter for IVR and AGI implementation on asterisk, have a good team for support and further development. Puppy Linux customization. • Linux - Hosting Systems Administration & Monitoring • Devops • Services Optimization • Security Hardening • VoIP, Asterisk, SMS, Dongle, FreePBX install configure, maintain • Infrastructure Planning • Disaster Recovery • Shell Scripting • Capacity planning, application delivery planning • Network Troubleshoot, Spanning Tree, PVST, RSTP, HSRP, RIP, BGP, EGRP IGRP, MPLS • SAN Troubleshoot • Glusterfs, CEPH • NFS, SMB, ISCSI, SMTP • Linux performance tuning • MySQL, Oracle DB performance tuning • Laravel web application development • Web Security, Web benchmark, best practice • IPTV, Live streaming, VOD, FFmpeg • Raspberry Pi ย่อ
  • จ้าง dailas
    5.5
    59 รีวิว $25 USD ต่อชั่วโมง
    Specialties: IT Management, Network Engineering, MS Windows & Linux administration, Asterisk PBX (dCAA), FreePBX (SCE), user support, computer maintenance and support, Web-services, CCTV More than 5 years of Asterisk PBX (plain, elastix, FreePBX) administration and support. Digium Certified Asterisk...
    Specialties: IT Management, Network Engineering, MS Windows & Linux administration, Asterisk PBX (dCAA), FreePBX (SCE), user support, computer maintenance and support, Web-services, CCTV More than 5 years of Asterisk PBX (plain, elastix, FreePBX) administration and support. Digium Certified Asterisk Administrator FreePBX Sangoma Certified Essential PBXact Sangoma Certified Essential ย่อ
  • จ้าง Erewin
    5.2
    20 รีวิว $30 USD ต่อชั่วโมง
    Hello. Most of my work is support current voip system. We have now many of them. Wholesale, PBX does not matter. Ask me for help. My main benefits is whole knowledge from unix to softphone. I have been working with VOIP since 2004. In every code i try to find logic. So, after many years i got many schemes to...
    Hello. Most of my work is support current voip system. We have now many of them. Wholesale, PBX does not matter. Ask me for help. My main benefits is whole knowledge from unix to softphone. I have been working with VOIP since 2004. In every code i try to find logic. So, after many years i got many schemes to realize any features. Most used software in my work are: Unix, Python, Django, PHP, Opensips, Kamailio, MySql, Postgres. ย่อ
  • จ้าง TrueGardener
    4.0
    1 บทวิจารณ์ $39 USD ต่อชั่วโมง
    ✪ FAST SPEEDY & BEST QUALITY ✪ ◆ Angular JS, Angular 2, Angular 4, Angular 5 and Angular 6 ◆ Angular Material Ample Required ◆ Angular Ionic Any Version and React Native Any Version ◆ Video Streaming and Text Chat and Text2Voice ◆ React JS ◆ FFMpeg Expert ◆ Laravel And Vue.js ◆ Twilio and All Payment Gateway...
    ✪ FAST SPEEDY & BEST QUALITY ✪ ◆ Angular JS, Angular 2, Angular 4, Angular 5 and Angular 6 ◆ Angular Material Ample Required ◆ Angular Ionic Any Version and React Native Any Version ◆ Video Streaming and Text Chat and Text2Voice ◆ React JS ◆ FFMpeg Expert ◆ Laravel And Vue.js ◆ Twilio and All Payment Gateway Integration ◆ Codeigniter and Shopify and Zend expert ◆ Facebook Social App Integration ◆ Mobile Native App and NDK Expert ◆ Cocos 2dx and Html5 Game Expert YOUR SUCCESS IS MY SUCCESS Best regards. ย่อ
  • จ้าง nasirbest
    5.8
    12 รีวิว $30 USD ต่อชั่วโมง
    ICTInnovations is a software company having specialization in Telecommunication Industry. ICT Innovations is a team of innovative, positive, objective, highly qualified and research oriented professionals having in depth knowledge of broad spectrum of Information and Communication Technologies (ICTs) with extensive...
    ICTInnovations is a software company having specialization in Telecommunication Industry. ICT Innovations is a team of innovative, positive, objective, highly qualified and research oriented professionals having in depth knowledge of broad spectrum of Information and Communication Technologies (ICTs) with extensive experience in open source Softwares, LAMP Development, Linux platforms, TCP/IP Networking and VOIP Communication Systems. ย่อ
  • จ้าง Asterisker
    4.9
    33 รีวิว $14 USD ต่อชั่วโมง
    Work with VoIP and PSTN, experience with the signaling protocols: SIP, SDP, RTP, IAX2, H323, SS7, TLS, SRTP. Interfaces DAHDI, AMI, AGI, PRI. Setting up and supporting Call centre, about 30 operators. Setting up VoIP using Asterisk, dialplan creating, developing Asterisk code, PHP, bash. Assisting developers with...
    Work with VoIP and PSTN, experience with the signaling protocols: SIP, SDP, RTP, IAX2, H323, SS7, TLS, SRTP. Interfaces DAHDI, AMI, AGI, PRI. Setting up and supporting Call centre, about 30 operators. Setting up VoIP using Asterisk, dialplan creating, developing Asterisk code, PHP, bash. Assisting developers with any service-related issues or feature requests. Jointly managing a network of 300 phones. Reporting based on CDR, CEL, queue_log database data. Configuring VoIP gateways Cisco, Addpac, Allvoip, Linksys, Snom, Polycom, GrandStream, D-Link. PSTN ATS Panasonic KX-TDA100 KX-TDA200. Auto-provisioning with xml files via TFTP, HTTP, HTTPS protocols. Testing with SIPp. Debuging with Voipmonitor, Homer. SBC Kamailio. Data quality for associated reporting systems. Configuring and monitoring VoIP equepment with Zabbix, Cacti, Monit, MRTG Extensive experience administering Linux servers.Services Apache, NGINX, DNS DHCP TFTP MySQL. Some experience with virtualization on VMware ESXi ย่อ
  • จ้าง AhmedMFakkar
    3.3
    5 รีวิว $25 USD ต่อชั่วโมง
    I'm network engineer holding Cisco CCNP certificate. I have 5 years of experience in IT networks. My specialties: - Design and implement medium and large scale enterprise networks. - Configure Cisco routers (ASR 1K & 9k, 2900, 2800), Switches (6500, 3750, 2900, SG- 300, SG-500) and Firewalls (ASA 5505, 5506x). -...
    I'm network engineer holding Cisco CCNP certificate. I have 5 years of experience in IT networks. My specialties: - Design and implement medium and large scale enterprise networks. - Configure Cisco routers (ASR 1K & 9k, 2900, 2800), Switches (6500, 3750, 2900, SG- 300, SG-500) and Firewalls (ASA 5505, 5506x). - Configure Juniper Routers (M7, M10, MX 480, MX 960) and SRX (300, 500). - Packet tracer and GNS3 - Data analysis with Wireshark. - Write technical reports and summaries. ย่อ

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