Founding Product Engineer: Build & Ship Developer Tools

AgentMail (YC S25); San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

AgentMail is building the communication infrastructure for AI agents in San Francisco. We’re seeking a Founding Product Engineer to define what using AgentMail feels like and own products from ambiguous problems to developer-facing solutions.

You will ship polished frontend work and robust backend services, talk directly to customers, and turn insights into shipped software while shaping the developer experience and product engineering culture.

Qualifications

• Ship polished frontend and robust backend features.
• Interview customers to understand problems.
• Turn problems into shipped product quickly.

Responsibilities

• Own end-to-end product from problem to shipped software.
• Build across frontend, APIs, data models, infra.
• Interview developers and review usage data.
• Shape developer experience: onboarding, APIs, docs.
• Prototype ideas from customer conversations quickly.
• Influence product design and interaction patterns.

Skills

Full-stack

Frontend

Backend

Customer interviews

Product mindset

Job description

AgentMail is building the communication infrastructure for AI agents in San Francisco. We’re seeking a Founding Product Engineer to define what using AgentMail feels like and own products from ambiguous problems to developer-facing solutions.

You will ship polished frontend work and robust backend services, talk directly to customers, and turn insights into shipped software while shaping the developer experience and product engineering culture.