VOIP Lead Engineer | 100% (Remote)
Job Description:
We are seeking a Lead VoIP Engineer to design and build high-performance modules
within our Voice platform. You’ll work on the core telephony stack involving
signaling, media processing, NAT traversal, and RTP relaying. This is a hands-on
execution role ideal for engineers who love building, debugging, and optimizing
real-time communication systems.
Responsibilities:
* Implement core voice capabilities using FreeSWITCH, Kamailio, and RTPEngine.
* Build and optimize SIP call routing logic, RTP media relays, failover
mechanisms, and NAT traversal.
* Develop and manage configurations for scalability, codec negotiation, SIP
trunk registration.
* Implement and test features like call recording, IVR, voicemail, DTMF
detection.
* Monitor live traffic and participate in 24x7 on-call rotation for critical
escalations.
* Collaborate with QA on stress/load testing and with Backend teams on
provisioning APIs.
* Document design decisions, configurations, and troubleshooting runbooks.
* Troubleshoot and debug production issues,
providing timely resolutions.
* Stay up-to-date with emerging technologies and industry trends, identifying
opportunities for innovation and improvement.
* Collaborate with DevOps teams to ensure smooth deployment and operation of
backend services in the AWS cloud environment.
Requirements:
* 8+ years of experience building and operating VoIP systems or CPaaS
platforms.
* Solid expertise with SIP signaling, RTP, and media relay techniques.
* Strong hands-on with FreeSWITCH, Kamailio/OpenSIPs, RTPEngine.
* Hands-on experience with Session Border Controller (SBC), Media Servers and
WebRTC.
* Experience in managing telephony infrastructure for uptime, latency, and call
quality optimization.
* Robust systems programming and debugging skills in C/C++.
* Good scripting/debugging skills (Bash, Python, or Lua for FreeSWITCH
modules).
* Proficiency with diagnostic tools (Homer , VOIPMonitoring, Wireshark, tc
📌 Lead VOIP Engineer (India)
🏢 Eltropy
📍 India