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.
Solid 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, tcpdump etc).
Experience working with geo

📌 Lead VOIP Engineer (Bengaluru)
🏢 Eltropy
📍 Bengaluru