Senior Voice AI Engineer

ABOUT THE ROLE As a founding engineer on a small conversational AI team, you will own the real-time voice layer, from incoming speech through AI reasoning to spoken responses. You will help make natural, responsive voice interactions work reliably in production, with a focus on end-to-end latency. WHAT YOU'LL DO - Build and own streaming speech-to-text, LLM turn-taking, text-to-speech, and telephony or WebRTC transport. - Measure and reduce latency, targeting first audio under 800 milliseconds on real calls. - Address interruptions, barge-in, silence detection, overlapping speech, poor audio, accents, and mid-sentence changes. - Build an evaluation harness from recorded calls, transcripts, and scored turns to detect regressions and guide product decisions. - Compare voice providers and models through evidence-based testing, and make changes based on results. - Instrument production systems for turn latency, transcription confidence, drop-offs, and cost per minute. - Work directly with founders and make technical decisions in a fast-moving team. WHAT WE'RE LOOKING FOR - At least 5 years building production software, including 2 or more years shipping voice, speech, or real-time audi... Click Apply to read the full job description.