engineering
Posted 3 weeks agoTelephony Engineer - Remote
at Retell AI
ArgentinaRemote
Responsibilities
- 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.
Requirements
- ABOUT RETELL AI Retell AI is using first principles to reimagine the call center with cutting-edge voice AI.
- Thousands of companies now utilize Retell’s AI voice agents to handle sales, support, and logistics calls that once required large teams of human agents.
- Instead of basic automation that needs constant human tuning, we’re creating intelligent AI “workers” that can act as frontline agents, QA analysts, and managers — continuously executing, monitoring, and improving customer interactions.
- We’re growing quickly and looking for ambitious builders who want to tackle hard technical problems, move fast, and have real impact at one of the fastest-growing voice AI startups.
- - We’re a top 50 AI app in a16z list: a16z Top AI Apps https://tinyurl.com/5853dt2x?utm_source=chatgpt.com - #4 on Brex's Fast-Growing Software Vendors of 2025: Brex Benchmark 2025 https://www.brex.com/journal/brex-benchmark-december-2025?utm_source=chatgpt.com - We're also one of the top ranking startups on: Lean AI Leaderboard https://leanaileaderboard.com/?utm_source=chatgpt.com - Enterprise Tech 30: Wing Venture Capital ET30 https://www.wing.vc/et30/overview?utm_source=chatgpt.com
- You’ll move fast, collaborate with customers, and help define the gold standard for AI voice infrastructure. KEY
- YOU MIGHT THRIVE IF - 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).
Benefits
- Backed by Y Combinator, Alt Capital, and other leading investors, we have scaled to $60M ARR with a team of 40 people, up from $5M at the start of 2025.