Job Description
Walk-in Interview – VoIP EngineerAbout startelelogic
nstartelelogic is an AI-powered Omnichannel Customer Experience (CX) platform that helps businesses deliver seamless and intelligent interactions across voice, chat, email, WhatsApp, social media, and more.
nOur platform brings together Conversational AI, Voice AI, AI Agents, automation, analytics, and human-assisted workflows to simplify customer support, sales, and engagement.
nWe are looking for a motivated VoIP Engineer with 1+ year of hands-on experience in VoIP and SIP technologies to join our telecom engineering team.
nThe ideal candidate should have practical knowledge of SIP, VoIP call flows, Linux, FreeSWITCH, and/or Kamailio, along with basic programming and scripting skills. The candidate will work on developing, configuring, troubleshooting, and maintaining reliable, carrier-grade VoIP systems.
nKey Responsibilities
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Configure, troubleshoot, and maintain FreeSWITCH and Kamailio platforms.n
Understand and troubleshoot SIP signaling and VoIP call flows.n




Analyze SIP messages such as INVITE, ACK, BYE, CANCEL, REGISTER, OPTIONS, 200 OK, 4xx, and 5xx responses.n
Troubleshoot common VoIP issues, including:n
One-way or no audion
Call failuresn
SIP registration issuesn
DTMF problemsn
Codec negotiation issuesn
NAT-related issuesn
Call routing failuresn
Work with SIP trunks, extensions, gateways, DIDs, and VoIP routing.n
Monitor and troubleshoot production VoIP services.n
Use tools such as sngrep, tcpdump, Wireshark, netstat/ss, and other Linux utilities for debugging.n
Work with FreeSWITCH dial plans, XML configurations, and SIP profiles.n
Assist with Kamailio routing and configuration.n
Perform SIP trunk testing, call-flow analysis, and connectivity troubleshooting.n
Write or modify basic scripts using Python, Lua, Perl, or Bash.n
Collaborate with senior engineers to implement recent VoIP features and telecom integrations.n
Mo

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