Founding Product Engineer

About the Role

This is the first engineering hire at a Y Combinator-backed AI marketing startup, working directly alongside the two founders. You will own full product features from ambiguous problem all the way to live, customer-facing product, and your work will span product thinking, frontend, backend, LLM pipelines, data, and direct customer conversations. It is a true founding-scope role with immediate, meaningful impact.

What You'll Do

• Own product features end to end: figure out what to build, ship it, and keep iterating until it creates real customer value.

• Work closely with the founders and customers to turn conversations into concrete product improvements.

• Build and maintain production full-stack features across frontend, backend, and data layers.

• Design simple, intuitive UX for complex workflows.

• Develop and improve LLM pipelines and agentic workflows within the product.

What We're Looking For

• Approximately 2 to 4 years of relevant engineering experience, with a strong track record appropriate for a first engineering hire.

• Demonstrated early-stage startup or founding experience; big-