Founding Engineer - Full Stack

About the role

A Y Combinator‑backed AI startup is looking for a Founding Engineer – Full Stack to join a small founding team at the ground floor. The company builds tools that help brands understand and shape how large language models perceive and represent them, offering a rare chance to co‑define engineering culture from day one.

Key responsibilities

• Own problems end‑to‑end, from customer insight and product requirements through research and infrastructure.
• Maintain a tight feedback loop with customers and the founding team; ship features quickly and iteratively.
• Help define and shape the engineering team’s culture, patterns, and best practices.
• Continuously explore and reinvent how engineering teams work effectively alongside AI agents.

Required profile

• 1+ years of experience on engineering teams (2+ preferred), with at least one stint longer than 18 months in a strong startup or scale‑up environment.
• Full‑stack proficiency – comfortable owning customer‑facing UI through to infrastructure.
• Hands‑on experience with React, Python, Terraform, and AWS.
• Experience building agentic systems or working with LLMs in production.
• Strong product sense and design instincts; able to translate customer needs into shippable features.
• Startup experience or self‑driven personal projects that demonstrate initiative and high agency.
• Must be a US citizen or have US work authorization (no visa sponsorship for candidates outside the US).

Required skills

• React
• Python
• Terraform
• AWS

What we offer

• Salary: $150,000 – $250,000 USD annually (depending on experience)
• Early‑stage equity
• Visa sponsorship available for eligible candidates