Senior VOIP Developer

Desired Skills ● Good understanding of TCP/IP protocol stack and practical knowledge of VLAN / L3 VPNs ● Very good knowledge on SIP / SDP protocol / RTP / SRTP / TLS protocols ● Must have knowledge in OpenSIPS or Kamailio ● Must have experience with C / C++ programming language ● Must have knowledge in diameter ● Experience in MySQL, MongoDB ● Knowledge of IMS call flow ● 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 Freeswitch, Asterisk ● 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 ● Firewall, Security