Senior SIP Engineer — AI Voice & Carrier Networking

Telegent, Inc.; Pleasant Grove (UT); On-site; USD 120,000 - 180,000; Full time

Job summary

Telegent, Inc. is seeking a Senior SIP/VoIP engineer to own call routing, trunk interconnects, and programmable voice features. You will partner with product and engineers to scale the voice stack, integrate with AI agents, and drive reliability and security across global carrier connections.

The role emphasizes hands-on SIP/IMS expertise, end-to-end lifecycle ownership, and a fast, high-quality engineering culture in a headless mobile network environment.

Qualifications

• Deep SIP and RTP fluency with SIP traces and media handling.
• Production experience with OpenSIPS, Kamailio, FreeSWITCH or Asterisk at carrier scale.
• Experience with IMS core, VoLTE/VoWiFi, and interconnects/carrier setups.
• Strong routing knowledge and ability to trace call paths end-to-end.
• Ability to build and ship features via programmable voice platforms and APIs.
• Comfort with Python/Go/TypeScript, Redis, REST, Linux, and IaC tools like Terraform.

Responsibilities

• Own call routing across SBCs, media servers and trunks.
• Onboard new SIP trunks and interconnects in days, not weeks.
• Develop programmable voice features: APIs, IVR, recording, streaming to AI.
• Support AI voice products including call screening and scam detection.
• Migrate legacy voice to direct SIP trunks with minimal downtime.
• Own caller trust via STIR/SHAKEN, CNAM and consent recording.
• Ensure reliability at scale with redundancy, geo-routing, monitoring.
• Debug quickly and translate fixes into tests and runbooks.
• Document decisions and share knowledge across the team.

Skills

Deep SIP and RTP knowledge

SIP trunking & carrier interconnects

OpenSIPS / Kamailio / FreeSWITCH / A26

IMS core, VoLTE / VoWiFi

NAT traversal, SDP, codecs (G.711, G.

Call routing & signaling tracing

AI-native / agentic coding concepts

Python / Go / TypeScript; Redis; REST;

Linux; Terraform; cloud networking (AZ

Tools

Wireshark

Terraform

Azure

Redis

Linux

SIP tracing tools

Job description

Telegent, Inc. is seeking a Senior SIP/VoIP engineer to own call routing, trunk interconnects, and programmable voice features. You will partner with product and engineers to scale the voice stack, integrate with AI agents, and drive reliability and security across global carrier connections.

The role emphasizes hands-on SIP/IMS expertise, end-to-end lifecycle ownership, and a fast, high-quality engineering culture in a headless mobile network environment.