Senior Voice AI Engineer

Remote, Worldwide

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 audio...