Voice AI Engineer

Mediatrixsrl — Poland · Posted ~3 hours ago

Senior

Skills

Voice AI LiveKit Agents Pipecat SIP trunking Telephony G.711/μ-law 8 kHz narrowband audio Opus transcoding Audio resampling Voice activity detection Turn-taking IVR DTMF Digit grammars Slot filling SIP G.711 Opus VAD

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Summary ✨ AI‑Generated

Join a technically demanding voice AI engineering role focused on assessing and improving an existing production architecture. You will work hands-on with real-time voice agents, SIP telephony, narrowband audio codecs, transcoding, endpointing, turn-taking, and IVR behavior. The role favors engineers who have deployed voice systems on real phone numbers, configured telephony infrastructure themselves, investigated difficult audio issues, and are comfortable reading framework source code and technical issue discussions.

Highlights

Hands-on role focused on improving production voice AI architecture, real-time telephony, audio quality, and conversational turn-taking. Strong emphasis on practical debugging, deep technical understanding, and production experience.

Description

The main responsability for this role would be to assess an existing architecture to give recommendations and implement improvements. Has put a voice agent on a real phone number in production using LiveKit Agents or Pipecat, with SIP trunking they configured themselves. Ask which carrier and what broke — a real one has a story about one-way audio or codec negotiation.Telephony audio literacy: G.711/μ-law, 8 kHz narrowband, Opus transcoding, resampling. This is the fastest filter in the whole screen.Endpointing and turn-taking as a subject they have opinions about — VAD versus semantic/waveform turn detection, and the false-cutoff-versus-latency tradeoff as a tuning surface rather than a setting.Reads framework source, not just docs. Our fix was found in audio_recognition.py, not in a config page. Someone who has filed or read GitHub issues in these repos is worth more than someone with a longer CV.IVR instincts — DTMF, digit grammars, slot filling, retries, confirmation read-back. The whole industry answer to digit capture came from that world, and it's a generation older than the voice-AI crowd.Spanish-language voice experience, ideally Caribbean or LatAm. Nice to have, and the pool shrinks fast if you make it mandatory — you already have that knowledge in-house.