Founding Product Engineer

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

Job summary

AgentMail is seeking a Founding Product Engineer to shape the early product experience for developers. You will own products from vague customer problems to usable, production-ready solutions, working across polished frontend experiences, APIs, backend services, and data models.

You’ll talk directly to customers, interview developers, and translate insights into concrete product decisions. Autonomy and high ownership are core.

Qualifications

• Exceptional frontend engineer with strong product and design instincts.
• Strong backend prowess; comfortable with APIs, databases, queues, and distributed systems.
• Ability to turn vague customer problems into products with or without a detailed spec.

Responsibilities

• Build products end-to-end across frontend, APIs, backend, data models, and infra.
• Talk to customers; interview developers and study usage data to find pain points.
• Turn customer problems into viable products with clear value.
• Shape the developer experience from signup to production-ready features.
• Prototype quickly by turning ideas into usable demos for customers.
• Attend to product design and interaction details; influence UX decisions.
• Help define the product engineering culture as one of the early engineers.

Skills

Frontend development

Backend systems

APIs

Distributed systems

Customer interviews

Product thinking

Shipping code

UX awareness

Autonomy

Job description

San Francisco, CA In-person

AgentMail is building the communication infrastructure for AI agents.

Today, AI agents can write code, browse the internet, and take actions on behalf of people - but they still struggle to communicate and operate independently across the services humans use every day. AgentMail gives agents their own email identities and infrastructure to send, receive, and act on email programmatically.

We’ve processed hundreds of millions of emails and serve developers building some of the most ambitious agentic products.

We’re looking for a Founding Product Engineer to help define what using AgentMail actually feels like to our customers.

What you’ll do

You’ll own products from an ambiguous customer problem to something developers use every day.

That means you’ll:

• Build products end-to-end. Work across polished frontend experiences, APIs, backend services, data models, and infrastructure.

• Talk directly to customers. Interview developers, watch them use AgentMail, dig through support conversations and usage data, and understand where they’re getting stuck.

• Turn customer problems into products. Figure out what should be built - not just how to build it - and develop conviction about which problems are actually worth solving.

• Shape our developer experience. Improve everything between a developer signing up and getting something useful into production.

• Prototype quickly. Turn an idea from a customer conversation into something they can use days later.

• Sweat the details. We care deeply about how our products look, feel, and behave. You’ll have significant influence over the design and interaction patterns of AgentMail.

• Help define the product engineering culture. You’ll be one of the earliest engineers explicitly focused on product and will shape how we build products as the team grows.

Who we’re looking for

We’re looking for an engineer who thinks about the why behind what they’re building.

You might be a great fit if:

• You’re an exceptional frontend engineer with strong product and design instincts.

• You have strong backend prowess, comfortable working with APIs, backend systems, databases, queues, and distributed systems when necessary.

• You can take a vague problem like “developers can’t figure out why their agent didn’t respond to this email” and turn it into a product without waiting for a detailed spec.

• You enjoy talking to customers and can separate what someone asks for from the underlying problem they’re actually trying to solve.

• You can contextualize technical decisions in terms of customer and business impact.

• You have strong opinions about products.

• You’re comfortable moving quickly, shipping imperfect things, learning from usage, and iterating.

• You have extremely high agency. When something is broken or missing, your instinct is to fix it.

You don’t need to have been called a “Product Engineer” before.

We’re much more interested in whether you’ve built things people love and whether you can independently go from customer problem idea product shipped software learning.

What this role is not

This isn’t a role where a PM hands you a spec and a designer hands you a Figma file.

You’ll be expected to participate in the entire product process: talking to users, deciding what matters, designing solutions, writing the code, shipping them, and figuring out whether they worked.

You’ll have a tremendous amount of autonomy - and an equally high bar for ownership!

Why AgentMail

Work on a new category. We’re building infrastructure for a world where billions of AI agents need identities and ways to communicate with humans, businesses, and each other.

Build for builders. Our customers are developers. You’ll work directly with highly technical users and see the impact of what you ship immediately.

Own meaningful product surface area. We’re still early enough that fundamental pieces of the AgentMail experience haven’t been invented yet. You’ll help decide what the product becomes.

Move extremely fast. Customer conversations can become products within days. You’ll have the autonomy and resources to build without layers of process.

Have outsized influence. You’ll work directly with the founders and early engineering team and help establish how product engineering works at AgentMail.

We believe the interface between AI agents and the rest of the internet needs to be invented.

Come help us build it.