Principal VOIP Engineer

Description • 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) • Excellent problem-solving, debugging, and performance tuning skills Why You'll Love Sprinklr: We're committed to creating a culture where you feel like you belong, are happier today than you were yesterday, and your contributions matter. At Sprinklr, we passionately, genuinely care. For full-time employees, we provide a range of comprehensive health plans, leading well-being programs, and financial protection for you and your family through a range of global and localized plans throughout the world.For more information on Sprinklr Benefits around the world, head to to browse our country-specific benefits guides.We focus on our mission: We founded Sprinklr with one mission: to enable every organization on the planet to make their customers happier. Our vision is to be the world’s most loved enterprise software company, ever.  We believe in our product: Sprinklr was built from the ground up to enable a brand’s digital transformation. Its platform provides every customer-facing team with the ability to reach, engage, and listen to customers around the world. At Sprinklr, we have many of the world's largest brands as our clients, and our employees have the opportunity to work closely alongside them.  We invest in our people: At Sprinklr, we believe every human has the potential to be amazing. We empower each Sprinklrite in the journey toward achieving their personal and professional best. For wellbeing, this includes daily meditation breaks, virtual fitness, and access to Headspace. We have continuous learning opportunities available with LinkedIn Learning and more.  EEO - Our philosophy: Our goal is to ensure every employee feels like they belong and are operating in a judgment-free zone regardless of gender, race, ethnicity, age, and lifestyle preference, among others. We value and celebrate diversity and fervently believe every employee matters and should be respected and heard. We believe we are stronger when we belong because collectively, we’re more innovative, creative, and successful.  Sprinklr is proud to be an equal-opportunity workplace and is an affirmative-action employer. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. See also Sprinklr’s EEO Policy and EEO is the Law.