Founding AI Engineer

ABOUT THE ROLE Join an early-stage SaaS team as its fifth engineer and lead the technical direction of a real-time AI voice agent for sales. The agent participates in live customer calls, demonstrates products through browser control, and supports follow-up through the sales process. WHAT YOU'LL DO - Build the agent's reasoning, tool use, memory, and ability to recover when live conversations go off script while meeting strict latency requirements. - Develop evaluation pipelines and data workflows that turn real sales calls into measurable product improvements, using fine-tuning where appropriate. - Improve the reliability of browser-based product demonstrations conducted live while the agent speaks with buyers. - Ship end-to-end product features using TypeScript, Node.js, and Next.js, working directly with customers and design partners. - Set technical direction for model and architecture choices, build-versus-buy decisions, and future agent capabilities. WHAT WE'RE LOOKING FOR - Typically 4 to 7 years of experience as an AI engineer in voice AI, AI sales, browser agents, or fast-growing AI companies. - At least one year owning a user-facing AI agent in production, with real users or meaningful usage volume. - Experience building and operating AI agents end to end, including evaluation, observability, and cost optimization. - At least one year working with real-time voice technologies such as WebRTC, LiveKit, or streaming systems, or browser agents using tools such as Playwright. - Proficiency in TypeScript, Node.js, and Next.js, along with experience with LLM APIs, browser automation, and agent evaluations. - Customer-facing engineering experience, including working directly with design partners or customers; sales technology experience is useful. - Ability to work on-site in New York from the start. COMPENSATION & BENEFITS Base salary is $216,000 to $250,000 annually. Visa sponsorship is available. LOCATION On-site in New York, United States.