Telephony Engineer - Remote

About this role

Retell AI is seeking a Telephony Engineer to own the technical success of voice AI integrations with enterprise communication platforms. You'll troubleshoot complex SIP/RTP issues, support enterprise clients post-onboarding, and drive product improvements based on customer feedback.

What you'll do

• Manage SIP integrations with CCaaS/CPaaS platforms (NiCE, Five9, Avaya, Genesys, Amazon Connect, Twilio, Telnyx)
• Investigate and resolve call failures using PCAP analysis, SIP traces, and carrier logs
• Serve as primary technical contact for enterprise customers post-onboarding
• Debug voice quality issues and improve call reliability
• Translate customer technical feedback into actionable product improvements
• Drive future platform integration initiatives

What they're looking for

• SIP Protocol (RFC 3261) and RTP debugging
• PCAP analysis and Wireshark/TShark packet inspection
• TCP/IP, TLS, DNS, and firewall networking
• CPaaS/cloud communication platform experience (Twilio, Plivo, Telnyx)
• Python, Bash, or JavaScript scripting
• Asterisk, FreeSWITCH, or Kamailio administration
• Enterprise customer communication and support
• Low-latency networking troubleshooting

Benefits

• Remote work opportunity
• Fast-paced startup environment with high growth trajectory
• Direct impact on AI voice infrastructure and customer experience
• Collaboration with leading-edge voice AI technology
• Opportunity to influence product roadmap through customer insights
• Work with enterprise-scale customers