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Co-Founder (Tech)

Stealth Startup AI Companion
San Francisco, CA Full Time
POSTED ON 11/27/2025
AVAILABLE BEFORE 12/26/2025

We’re building an voice AI companions in stealth – designed to redefine how humans interact with AI on a deeply personal level.

I’m looking for a technical co-founder to join me on this journey. Someone who’s not just an engineer, but a true builder with the drive to take an idea from 0 1 scale.

What you’ll do

  • Lead all things tech product: architecture, backend, AI models, integrations, and deployment.
  • Build and scale AI agents with real-world utility, personalization, and autonomy.
  • Collaborate on product roadmap, vision, GTM, and fundraising.
  • Recruit, mentor, and lead our engineering team as we grow.
  • Own execution alongside me as we shape strategy, brand, and long-term value.

What you bring

  • Proven hands-on experience building AI/ML products, especially AI agents (LangChain, RAG, LLM fine-tuning, multimodal models, etc.).
  • Strong backend infra skills (Python, Node, APIs, cloud infra, deployment).
  • Hustler mindset: comfortable with uncertainty, fast experiments, and constant iteration.
  • Preferably IIT/IIM/Top-tier institute background, but mindset > pedigree.
  • Bonus: past startup/founder experience.

Why join

  • Work on something with massive potential at the intersection of AI and human behavior.
  • All equity, no cash right now.
  • Plan is to get into Y Combinator/SPC.
  • Stealth stage = blank canvas. Huge freedom to shape product, team, and culture from scratch.

You'll focus on building, rest will be taken care by others. Engineer by birth? Please apply.

Salary.com Estimation for Co-Founder (Tech) in San Francisco, CA
$361,780 to $553,943
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