What Does Success Look Like? We are looking for a Principal VOIP Engineer to lead the architecture and technical direc8on of our nextgen voice infrastructure. You’ll be responsible for building carrier- grade systems with high availability, low latency, and global scalability — powering mission-cri8cal voice communica8on in our CCaaS plaIorm. This is a hands-on leadership role where you will influence architecture, establish best prac8ces, and work cross-func8onally across Engineering, DevOps, Product, and QA teams. Seniority Level: Principal / Individual Contributor with technical leadership scope What You’ll Do • Design and implement VOIP (signaling and media) infrastructure using FreeSWITCH, Kamailio/OpenSIPs, and RTPEngine • Architect session border controllers (SBC), NAT traversal, load balancing, and failover strategies • Define standards for call rou8ng and audio quality op8miza8on (codecs, jieer, etc.) • Lead ini8a8ves for scalability, observability, security, and resiliency of our voice infrastructure • Troubleshoot live traffic and provide technical leadership during major incidents • Collaborate with Backend and API teams to design provisioning, billing, and call analy8cs APIs • Evaluate and onboard open-source tools or commercial carriers as needed • Coach and mentor junior/lead engineers in VoIP best prac8ces What Makes You Qualified? • 12+ years of hands-on experience in the Telephony / VoIP / CPaaS domain • Strong knowledge of VoIP Protocols (SIP/SDP, RTP/RTCP), Networking fundamentals (UDP/TCP/IP, DNS, MPLS), QoS (latency, jieer, packet loss mi8ga8on). • Hands-on experience with Session Border Controller (SBC), Media Servers and WebRTC. • Expert-level understanding of SIP, RTP, NAT traversal (ICE/STUN/TURN), and VoIP security (TLS, SRTP, fraud preven8on) • Hands-on development experience with FreeSWITCH, Kamailio/OpenSIPs, and RTPEngine • Experience in designing carrier-grade telephony plaXorms serving millions of calls • Strong systems programming and debugging skills in C/C++ • Strong troubleshoo8ng skills, with experience using network monitoring and debugging tools. • Familiarity with distributed systems and cloud-based deployments (AWS, GCP, Azure)
Job Title
Principal VOIP Engineer