Founding Engineer ($150k - $250k + Equity) at AgentMail

Founding Engineer

AgentMail - High-growth infrastructure startup building the sole identity and communication layer for the AI agent era.

As a Founding Engineer, you will build the primitives that allow AI agents to communicate, authenticate, and operate in the real world. You will design intuitive APIs and high-performance distributed systems, owning projects from 0 to 1 while processing hundreds of thousands of emails daily for a rapidly expanding user base.

Location: San Francisco, USA

Why this role is remarkable:

• Unique Market Positioning: AgentMail is building the "Gmail for Agents," serving as the essential identity provider in a category set to outnumber human users.
• Elite Pedigree: Join a high-caliber founding team with deep expertise from top-tier firms including Optiver, NVIDIA, Amazon, and Modern Treasury.
• Extreme Growth: The company has doubled its user count every two weeks since January, offering rare early-stage momentum and massive equity upside.

What you will do:

• Design and implement core backend infrastructure and APIs specifically optimized for AI agents as the primary end-users.
• Architect and scale low-latency distributed systems capable of processing high-volume communication and authentication requests.
• Lead end-to-end product initiatives from initial system design through to production rollout and customer feedback cycles.

The ideal candidate:

• Technical Mastery: Proven experience shipping production-grade software and managing complex cloud infrastructure or distributed systems at a high-growth startup.
• Product Ownership: A 0-to-1 builder who obsesses over quality and is comfortable making critical decisions across the entire stack.
• Strategic Communicator: A clear thinker capable of articulating technical trade-offs and navigating the uncharted territory of agent-to-agent communication.