Founding AI Engineer
Summary
Founding engineer who builds and leads the core AI voice agent for a B2B SaaS sales product: agent reasoning, tool use, and memory; real-time voice (WebRTC/LiveKit); browser automation for live product demos; and eval pipelines, shipped end-to-end with TypeScript, Node.js, and Next.js. On-site in New York; $200k–$250k base plus equity.
About the Role
Build and lead the core AI voice agent for a growing B2B SaaS product. As a founding engineer on the team, you will shape the agent's technical direction and help it conduct live sales conversations, demonstrate products through a browser, and follow up with prospects.
What You'll Do
Build the agent's reasoning, tool use, and memory, including reliable recovery when conversations go off script under real-time latency constraints.
Develop evaluation pipelines and work with call data to drive measurable improvements, including fine-tuning where it is effective.
Improve browser-agent reliability for live product demonstrations while the agent is speaking with buyers.
Ship end-to-end product capabilities using TypeScript, Node.js, and Next.js.
Work directly with customers and design partners, and set direction on models, architecture, and build-versus-buy decisions.
What We're Looking For
Four to seven years of AI engineering experience, including shipping production AI agents and owning their full workflow.
At least one year working with real-time or voice AI systems, such as WebRTC, LiveKit, streaming, or other low-latency applications.
Experience with voice AI, AI sales, browser agents, browser automation, or a fast-growing AI company.
Proficiency in TypeScript, Node.js, and Next.js, with familiarity in LLM APIs, evaluations, observability, and cost optimization.
Experience with Playwright or similar browser automation tools is valuable.
A computer science degree or a strong technical background in a field such as mathematics, physics, or engineering.
Customer-facing engineering experience, startup or founding-team experience, or exposure to sales technology and go-to-market tools is a plus.
Must be based in New York or able to relocate there from the start.
Compensation & Benefits
Base salary is $200,000 to $250,000 USD annually. Visa sponsorship is available. Equity details were not provided.
Location
On-site in New York, New York, United States.
Skills
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