VOIP Developer

Desired Skills

Good understanding of TCP / IP protocol stack and practical knowledge of LAN / WAN

Very good knowledge on SIP / SDP protocol / RTP / SRTP / TLS protocols

Experience in OpenSIPS or Kamailio

Experience in Freeswitch, Asterisk

Experience in MySQL, MongoDB

Experience with C / C++ programming language

Standard features of Enterprise Communication Servers (PBXs)

Problem Troubleshooting and debugging techniques

Review work of resources

Good in Written and verbal communication

Nice to Have

Inter-process communication, API design, message queues

Experience in building any of softPBX, Voicemail, ACD, IVRS these applications

Experience in any of the programming languages like Python, PHP, Javascript, Java

Knowledge of Linux / server administration

Experience in Linux and Linux commands line tools

Knowledge of WebRTC

Firewall, Security

Tools cmake, git