Position: VOIP Lead Engineer(Remote)
About Eltropy (www.eltropy.com) - 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.
Eltropy Values: No fear - tell the truth. Customers are our north star. Nothing is impossible.
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.
If you are a talented and motivated Lead VoIP Engineer seeking a challenging opportunity to contribute to the success of our organization, we would love to hear from you. Please submit your resume and portfolio showcasing your relevant work.
