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# Founding Engineer

- **Company:** David Joseph & Company
- **Location:** New York, NY, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Python (Programming Language), Node.Js, Redis, OpenAI, Next.js, TypeScript, Management of Software Versions, Speech Recognition, ReactJS, Large Language Models, Information Technology
- **Published:** October 13, 2026
- **Apply:** https://www.juju.com/job/16_2b7bf6f8

## About the Role

* 3-8 years of full-stack engineering experience
 * Track record shipping a product from zero to one, whether at a high-growth startup, as a founder, or on a new-product team inside a larger company
 * Strong command of TypeScript across the stack (Node.js and React/Next.js)
 * Comfortable owning product decisions without a PM, including speaking directly with customers
 * Real, hands-on depth in at least one relevant area: production voice or SMS agents, long-running agent state and memory, B2B2C or marketplace products, or agent evaluation and guardrails
 * Genuine product experience building with LLM APIs or agent SDKs (not tutorials or thin wrappers)

Nice to Haves

 * Prior experience as a founder or at an accelerator-backed startup that gained real traction, with the perspective to reflect on what worked and what didn't
 * Degree from a strong computer science program (weighed more heavily for candidates at the earlier-career end of the range)
 * Python experience with real-time voice pipelines (LiveKit, Deepgram, STT/TTS) or with evaluation tooling

## Description

As a founding engineer, you'll take full ownership of a core domain, make product calls without a PM, and ship to production daily alongside a small, high-velocity team working in person in New York.

What you'll be doing

 * Own a core product domain end-to-end (for example the B2B business platform, the voice/SMS/email agent layer, the underlying data/AI graph, or a new consumer product)
 * Talk directly to customers, turn their feedback into product decisions, and ship the work yourself
 * Build and tune multi-modal agents for low-latency voice, strong messaging response rates, and durable conversation state across channels
 * Set the architecture and quality bar for non-deterministic systems: evals, prompt versioning, guardrails, and drift detection
 * Work across the full stack, from React/Next.js on the front end to Node.js services and Python voice pipelines

Tech stack: TypeScript, Node.js, Next.js, React, Python, LiveKit, Deepgram, Redis, plus modern LLM and agent tooling (Anthropic/OpenAI SDKs, Vercel AI SDK, Mastra, Braintrust)