Junior System Administrator (VoIP/Telephony) / Telephony Engineer (Telecommunications)

5+ years   |   Engineering & Product   |   Hyderabad

Job Description

We are looking for a Junior System Administrator (VoIP) / Telephony Engineer (Telecommunications) to join our Telebu's Communications engineering Team. The Telebuin will develop, implement and support IP Telephony related technologies including and not limited to IP Telephony, IVR platforms, Conferencing solutions, Voice engineering integration, Voice over IP (VoIP), Session Border Controllers (SBC), Session Initiation Protocol (SIP), WebRTC, and Public Switched Telephone Network (PSTN) gateways.


  • Develop and implement telephony networks with various components like SIP proxies, registrar, media-servers, billing systems etc.
  • Develop and deploy SIP VOIP/PRI trunking solutions, highly scalable, robust, high- availability (HA), and fault-tolerant telecom products/systems.
  • Administration of SIP and Media Servers, Network/Protocol level debugging and testing, Contact center solutions, Troubleshoots and resolves complex problems.
  • Provide IP Telephony and VoIP Subject Matter Expertise for Company and Company's managed service providers, manages 3rd party telecom carriers and providers.


  • 3 to 5 years of hands-on industry experience in telecommunications
  • Strong conceptualize knowledge and experience with telephony protocols like SIP, SDP, RTP, SRTP, WebRTC, and audio/video codecs.
  • In-depth working experience with Kamailio, Freeswitch, Any of the SIP stack (Sofia, reSIProcate, PJSIP, etc.), ICE Framework (STUN/TURN) and Linux
  • Hands on writing production quality code using any of the scripting languages like Python, Go, Erlang etc.
  • Experience in using the VoIP testing tools like Wireshark, VoIPMonitor, SIPp, SIPCapture, Homer etc.

Nice to have:

  • Working knowledge in any of NoSQL databases like MongoDB, Redis, Cassandra etc.
  • Passionate about knowing everything about VoIP Protocol standards & related RFCs
  • Experience with virtualization/container related technologies (Xen, VMware vSphere / ESXi, Docker, Kubernetes)


Life in System Administration

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