Lead Software Engineer

2 weeks ago

Bengaluru, India Sprinklr Full time

Sprinklr is a leading enterprise software company for all customer-facing functions. With advanced AI, Sprinklr's unified customer experience management (Unified-CXM) platform helps companies deliver human experiences to every customer, every time, across any modern channel. Headquartered in New York City with employees around the world, Sprinklr works with more than 1,000 of the world’s most valuable enterprises - global brands like Microsoft, P&G, Samsung and more than 50% of the Fortune 100. 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 What You’ll Do: - 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? - 6 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.

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