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

As a Junior System Administrator (VoIP) / Telephony Engineer at Telebu, you will be responsible for developing, implementing, and supporting IP Telephony related technologies. This includes working on 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. **Key Responsibilities:** - Develop and implement telephony networks with various components such as SIP proxies, registrar, media-servers, billing systems, etc. - Deploy SIP VOIP/PRI trunking solutions that are highly scalable, robust, high-availability (HA), and fault-tolerant telecom products/systems. - Handle administration of SIP and Media Servers, conduct Network/Protocol level debugging and testing, work on Contact center solutions, and troubleshoot and resolve complex problems. - Provide IP Telephony and VoIP Subject Matter Expertise for the company, manage Company's managed service providers, and handle 3rd party telecom carriers and providers. **Qualifications Required:** - 3 to 5 years of hands-on industry experience in telecommunications. - Strong conceptual 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. - Proficient in writing production quality code using scripting languages like Python, Go, Erlang, etc. - Experience in using 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. - Passion for understanding VoIP Protocol standards & related RFCs. - Experience with virtualization/container related technologies such as Xen, VMware vSphere / ESXi, Docker, Kubernetes.,