Founding Engineer

13 hours ago

New York, NY, USAMid Level / Senior

Base Salary

$180k - $250k/yr

Responsibilities

Own an entire product domain from architecture through daily production feature shipping.
Conduct customer calls, synthesize feedback, and independently drive product decisions without a dedicated product manager.
Build and optimize multimodal agents across voice, SMS, and email, targeting sub-500ms voice latency, high SMS response rates, and persistent conversation state.
Define the architecture and quality standards for nondeterministic systems, including evaluations, prompt versioning, guardrails, and drift detection.
Develop full-stack features across React and Next.js frontends, Node.js backends, and Python voice services.

3 to 8 years of full-stack engineering experience with a record of shipping zero-to-one products at high-growth startups, as a founder, or in new vertical teams at large technology companies.
Strong TypeScript proficiency with production experience using Node.js, React, and Next.js.
Hands-on production experience with LLM APIs or agent SDKs such as Anthropic, OpenAI, or Vercel AI SDK.
Depth in at least one of production voice or SMS agents, long-running agent state and memory, B2B2C or marketplace product architecture, or agent evaluations and guardrails.
Ability to conduct customer discovery calls and make product decisions without a dedicated product manager.
Comfort operating without structure, defining processes from scratch, and sustaining high intensity during launches.
Python experience with real-time voice pipelines or evaluation tooling is a plus.
Familiarity with Redis, BullMQ, Vercel, Render, Sentry, or PostHog is a plus.
Founder experience with verifiable traction and strong computer science fundamentals from a rigorous program are pluses.