Lead VOIP Engineer

**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. - Strong 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 geographically distributed infrastructure or HA deployments. **About Eltropy** () - Eltropy is a rocket ship FinTech on a mission to disrupt the way people access financial services. Eltropy enables financial institutions to digitally engage in a secure and compliant way. Using our world-class digital communications platform, community financial institutions can improve operations, engagement and productivity. Community banks and Credit Unions use Eltropy to communicate with consumers via Text, Video, Secure Chat, co-browsing, screen sharing and chatbot technology — all integrated in a single platform bolstered by AI, skill-based routing and other contact center capabilities.