Senior Engineer, Backend/Infra

AgentMail•San Francisco, CA

3d•Onsite

About The Position

AgentMail is building an API designed to give inboxes to AI agents and be the sole identity + communication provider. It isn't AI for your email, it's email for your AI. We’re looking for a founding engineer with strong backend and infra instincts to help build the primitives agents will use to communicate, authenticate, and operate in the real world. This is a role for someone who likes systems work: APIs, distributed infrastructure, reliability, developer tooling.

Requirements

You want to solve problems end-to-end: every engineer owns a part of the product and needs to make decisions across the frontend, infrastructure, backend, and UX.
You have a high bar for quality: At a startup, speed is the only advantage we have over big-tech companies. But even more important is to care about your output and obsess about details.
You are a clear thinker and communicator: We have daily standups and weekly syncs in which we expect you to communicate tradeoffs, problems, and blockers directly.
You are highly technical: preferred you have prior experience shipping production software by real users as a software engineer at a tech company or startup. But hustlers are always appreciated.
Has 3+ years of work experience as an engineer working on infrastructure at a tech company
Has architected software used in production by millions of users

Nice To Haves

Experience with cloud infrastructure, distributed systems, or developer tools
Experience with messaging, email, auth, or protocol-heavy systems
Experience building for AI/LLM use cases

Responsibilities

Lead and manage a team of 4-6 engineers
Design APIs and abstractions that are intuitive for both humans and AI Agents
Build high-performant, low-latency systems with the idea that agents are the end-users in mind
Get your hands dirty by touching our core infrastructure that processes hundreds of thousands of emails per day.
Think creatively about being the bridge between cutting edge AI capabilities with something as primitive as email(an oxymoron we know)
Own projects end-to-end, from system design to production rollout
Write clear, maintainable code and strong technical documentation
Be the frontline for feedback from our customers - we’ll trust you to be our spokesperson