Founding Engineer

ABOUT THE ROLE Join a small team building multimodal AI agents for customer communication across voice, SMS, and email. You will own a core product or engineering domain end to end, shape decisions directly with customers, and help bring reliable AI systems into production. WHAT YOU'LL DO - Own a domain from architecture through frequent production releases. - Speak with customers, synthesize feedback, and make product decisions independently. - Build and optimize multimodal agents, including low-latency voice experiences and persistent, cross-channel conversation state. - Set quality practices for non-deterministic systems, including evaluations, prompt versioning, guardrails, and drift detection. - Work across React and Next.js interfaces, Node.js services, and Python systems. WHAT WE'RE LOOKING FOR - Three to eight years of full-stack engineering experience, with a record of shipping and scaling products from early stages in fast-paced environments. - Production proficiency in TypeScript, Node.js, React, and Next.js, plus experience building Python services. - Hands-on production experience with LLM APIs or agent SDKs, such as Anthropic, OpenAI, or comparable tools. - Strong depth in at least one area: production voice or SMS agents, long-running agent state and memory, agent evaluations and guardrails, or B2B2C and marketplace products. - Experience making product decisions, conducting customer discovery, and owning shipped work without relying on a dedicated product manager. - Understanding of backend infrastructure and data structures for persistent conversations, as well as low-latency systems and non-deterministic behavior. - Python experience with real-time voice pipelines or evaluation tooling is useful. Strong computer science fundamentals or founder experience with demonstrated product traction are also valued. COMPENSATION & BENEFITS Base salary: $180,000 to $250,000 annually. Visa sponsorship is not available. LOCATION On-site, five days per week in New York, New York.