Job
Description
Location - South Delhi Exp - Min 3+ years (5 Days working in roster) Responsibilities:  Design, develop, deploy, troubleshoot, and maintain tools and services supporting our cloud telephony network.  Expertise in SIP, RTP, RTCP, TURN, STUN, NAT, and TLS.  Customize FreeSWITCH for audio/video conferencing, ensuring it handles 1000-1500 concurrent calls.  Proficiency in RTP Proxy and routed audio conferences.  Understanding of SDP Protocol offer/answer.  Work with load testing tools for FreeSWITCH audio conferences.  Deploy multiple FreeSWITCH instances using load balancers.  3-4 years of experience in telecom protocols like SIP, RTP, and SMPP.  Knowledge of codecs (PCMU, PCMA, G729, Opus) and open-source telephony technologies (FreeSWITCH, WebRTC).  Debugging using packet captures.  Familiarity with SIP/RTP, H323 a plus.  Collaborate with the mobile team on APIs and support.  Knowledge of SBC, FreeSWITCH, and SIPX is a plus.  Bachelor's degree in Engineering (B.Tech or MCA).  3+ years of FreeSWITCH development or Ring Group Module or call centre module.  Proficient in Linux environments.  Basic to intermediate SQL skills.  Familiarity with network tracing tools (Wireshark/ SNgrep).  Strong problem-solving skills.  Strong understanding of VoIP protocols (SIP, RTP), codecs, and related technologies.  Solid knowledge of Linux operating systems and command-line tools.  Proficiency in coding language like C and Lua.  Understanding of networking principles, TCP/IP, DNS, DHCP, and routing protocols.  Knowledge of FusionPBX, Kamailio and Opensips. Job Type: Full-time Pay: ₹50,000.00 - ₹100,000.00 per month Benefits: Cell phone reimbursement Health insurance Life insurance Paid sick time Provident Fund Schedule: Day shift Work Location: In person
