Implement core voice capabilities using FreeSWITCH, Kamailio/OpenSIPs, 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.
What Makes You Qualified?
3 to 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 ( Wireshark, tcpdump etc ).
Experience working with geographically distributed infrastructure or HA deployments.
Lead a new category of enterprise software that we call Unified-CXM.
Empower companies to deliver next generation, unified engagement journeys that reimagine the customer experience.
Create a culture of customer obsession, with trust, teamwork and accountability.
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To learn more about all-things-Sprinklr, visit our candidate resource hub here .
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 passion
Benefits
Health insuranceVision insurance
Additional Information
Sprinklr is the definitive, AI-native platform for Unified Customer Experience Management (Unified-CXM), empowering brands to deliver extraordinary experiences at scale - across every customer touchpoint.
By combining human instinct with the speed and efficiency of AI, Sprinklr helps brands earn trust and loyalty through personalized, seamless, and efficient customer interactions. Sprinklr's unified platform provides powerful solutions for every customer-facing team - spanning social media management, marketing, advertising, customer feedback, and omnichannel contact center management - enabling enterprises to unify data, break down silos, and act on real-time insights.
Today, 1,900+ enterprises and 60% of the Fortune 100 rely on Sprinklr to help them deliver consistent, trusted customer experiences worldwide.
Job Description
What Does Success Look Like?
We are seeking a Lead Product (Software) Engineer-VoIP 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.
Seniority Level: Lead Individual Contributor
Sprinklr · India