AI Engineer - Voice Job at HartleyCo, Sonoma, CA

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  • HartleyCo
  • Sonoma, CA

Job Description

Head of Voice AI

San Francisco, CA (in-office, relocation supported)

We’re partnering with a YC-backed startup that’s building an AI-powered platform to reinvent one of the world’s largest industries. Voice is at the core of how their customers do business, and they’re hiring a AI Engineer - Voice to own the design, deployment, and scaling of voice systems that will power thousands of conversations every day.

This is a hands-on leadership role where you’ll prototype rapidly with low-code tools (VAPI, Retell) and then scale into custom voice infrastructure (LiveKit, Pipecat, WebRTC) as the company grows. You’ll build systems that handle everything from outbound prospecting to multi-turn applications, underwriting support, and 24/7 customer service - all while keeping latency below 700ms and delivering real business impact.

What You’ll Do:

  • Deploy production voice agents in weeks, not months, to drive immediate growth
  • Architect scalable infrastructure capable of handling 10,000+ concurrent calls
  • Build outbound agents that qualify leads, book meetings, and close pipeline gaps
  • Develop intelligent, multi-turn conversation workflows for long-form applications
  • Launch 24/7 voice agents for servicing, claims, payments, and renewals
  • Create internal tools and analytics to measure and optimize conversation quality

About You:

  • 5+ years of software engineering experience, with 3+ focused on voice/audio systems
  • Hands-on experience deploying production voice AI systems at scale (50K+ minutes/month)
  • Strong background in telephony and real-time audio (SIP, RTP, WebRTC, VAD, AEC, noise suppression)
  • Proficiency in Python and TypeScript/Node.js for real-time systems
  • Deep knowledge of modern STT/TTS and conversational AI providers (OpenAI, Anthropic, Deepgram, ElevenLabs, etc.)
  • Track record of shipping features fast and measuring success by business outcomes
  • Based in San Francisco (or willing to relocate) and excited by an in-office, high-intensity startup culture

Why Join:

This is an early hire at a YC startup where voice is the biggest lever for scale. You’ll work shoulder-to-shoulder with the founders, ship daily, and directly impact revenue, efficiency, and customer experience. If you’ve built voice AI before and want to push the limits of what’s possible in real-world production environments, this is the role to do it.

Job Tags

Work at office, Immediate start, Relocation, Relocation package,

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