Lead Product Engineer (C, C++, VoIP)

Sprinklr

5 - 8 years

35 - 60 Lacs

Gurugram

Posted:1 month ago| Platform:

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Skills Required

C++ C Programming Language VOIP SIP

Work Mode

Hybrid

Job Type

Full Time

Job Description

Sprinklr

What Does Success Look Like?

Lead VoIP Engineer

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?

5 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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