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HartleyCo

AI Engineer - Voice

HartleyCo, San Francisco, California, United States, 94199

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Base pay range $150,000.00/yr - $250,000.00/yr

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Headhunter & Director | Trusted by YC Founders to Build Their Founding Teams | Facilitating Growth Head of Voice AI 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

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.

Seniority level Mid‑Senior level

Employment type Full‑time

Job function Information Technology

Industries IT Services and IT Consulting

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