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# Telephony Engineer

- **Company:** Retell AI, Inc
- **Location:** San Francisco, CA, United States (Remote available)
- **Experience:** Expert
- **Salary:** $72,000.0 - $90,000.0
- **Contract:** Contract
- **Skills:** JavaScript (Programming Language), Artificial Intelligence, Bash Shell, VoIP, Software Debugging, Domain Name System (DNS), Session Initiation Protocols, Python (Programming Language), Pcap, TCP/IP, Wireshark, Twilio, Amazon Connect, Transport Layer Security, Genesys, Firewalls (Computer Science), Enterprise Integration, Kamailio
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/telephony-engineer-remote-retell-ai-9778471

## About the Role

* Have 5+ years as a Telephony Engineer, VoIP Engineer, or equivalent low-latency networking role.
 * Have deep understanding of the SIP Protocol (RFC 3261), RTP (media) debugging voice quality issues with PCAPs and trace tools such as Wireshark/TShark.
 * Strong Networking fundamentals.(TCP/IP/TLS, DNS, Firewalls).
 * Familiarity with modern CPaaS/cloud communication platforms (e.g., Twilio, Plivo, Telnyx).
 * Ability to write or modify basic scripts (e.g., Python, Bash, JavaScript). Automate routine troubleshooting tasks.
 * Exceptional ability to guide premium clients through complex setups and communicate technical issues clearly.
 * Familiarity with Asterisk/FreeSWITCH/Kamailio or relevant SIP proxy / SIP servers is a plus.

## Description

We are seeking a Telephony Engineer to who will own the technical success of our telephony integrations, act as the first line of defense for advanced enterprise telephony support, and drive seamless post-onboarding experiences. Your work will directly impact call quality, reliability, and customer experience. You'll move fast, collaborate with customers, and help define the gold standard for AI voice infrastructure., * Integration Ownership: Manage and collaborate with customers to support complex SIP integrations with CCaaS/CPaaS platforms like NiCE, Five9, Avaya, Genesys, Amazon Connect, Twilio, and Telnyx, while driving future platform integrations.

 * Advanced Troubleshooting: Investigate and debug call failures via PCAP analysis, SIP traces, and carrier logs to improve reliability.
 * Enterprise Support Frontline: Act as the primary technical point of contact for enterprise clients post-onboarding.
 * Product Advocacy: Translate customer technical feedback and friction points into actionable product improvements for our development teams.


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