The role
- COMP
- $150K - $250K
- EQUITY
- 0.5% - 1% equity
- LOCATION
- San Francisco
- WORKPLACE
- On-site
- EXPERIENCE
- 0 - 5 years
- VISA
- None
- STACK
- TypeScript, REST API
- INDUSTRY
- AI, API SDK, Devtools, B2B, Enterprise
/roles — ROLE_46
Founding Engineer
Developer infrastructure startup building the communication APIs that autonomous software agents use to exchange messages with people and services
The company
Developer-infrastructure startup giving AI agents real email inboxes via API — create, send, receive, and search programmatically.
- STAGE
- Series A-stage
- FUNDING
- $6M raised
- NOTE
- hundreds of thousands of emails processed daily
JD — the work
About the role
Build the core product at an infrastructure startup giving AI agents real email inboxes: the APIs and backend systems agents use to communicate, authenticate, and operate — already processing hundreds of thousands of emails daily.
What you'll do
- Design and build the core API and backend infrastructure
- Own 0-to-1 projects end-to-end: IMAP integration, usage-based pricing, more
- Work ~80% backend / ~20% elsewhere across distributed systems and developer tooling
- Pitch growth experiments and product ideas — bring ideas, not just execution
- Be the frontline for customer feedback, including enterprise custom deployments
What they're looking for
- 0-5 years (flexible upward) with production software at a pedigreed company — big tech or Series A+ startups
- 0-to-1 building track record
- Clear code and strong documentation habits
Nice to have
- Big-tech-to-startup path
- Founder/ex-founder experience