Telephony Engineer - Remote

Stack

Responsibilities

• ▹Manage SIP integrations with CCaaS/CPaaS platforms (NiCE, Five9, Avaya, Genesys, Amazon Connect, Twilio, Telnyx)
• ▹Investigate call failures via PCAP analysis, SIP traces, and carrier logs
• ▹Act as primary technical point of contact for enterprise clients post-onboarding
• ▹Translate customer feedback into actionable product improvements

Requirements

• ▹5+ years as a Telephony Engineer, VoIP Engineer, or equivalent low-latency networking role
• ▹Deep understanding of SIP (RFC 3261) and RTP, debugging voice quality with PCAPs, 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 (Python, Bash, JavaScript)
• ▹Exceptional ability to communicate complex technical issues to premium clients

Nice to have

• ▹Familiarity with Asterisk/FreeSWITCH/Kamailio or similar SIP proxy/servers

Soft skills

What we offer

• ▹$6000-7500 USD/month compensation, based on experience
• ▹Flexible employment type (full-time or part-time contractor)

About the company

Retell AI builds voice AI agent platforms to automate call centers, backed by Y Combinator and other leading investors, with $60M ARR.