Founding AI Engineer - Equity & Build Core Infra

Jack & Jill; San Francisco (CA); On-site; USD 150,000 - 250,000; Full time

Benefits offered by this job

Founding equity

In-person culture

Elite hardware budget

Job summary

Jack & Jill, a San Francisco-based VC-backed AI automation startup, is seeking a Founding Engineer to build the infrastructure for the next generation of AI-driven businesses. You will own the technical foundation, design agentic systems, and ship production code from day one in a fast-paced, in-person environment.

As the first engineering hire, you will set engineering standards, help recruit the team, and work with elite hardware and a generous model budget to turn ambitious plans into

Qualifications

• Extensive experience shipping production LLM applications with orchestration and tool integration.
• Capable of building across TypeScript, Python, and cloud infrastructure in production environments.
• Self-driven builder with high ownership in a startup setting.

Responsibilities

• Architect and deploy production-grade agent systems with orchestration and long-running tasks.
• Own the full product lifecycle from user research to deployment and refinement.
• Set engineering standards and contribute to recruitment of future engineers.

Skills

LLM applications

Full-stack development

Autonomous building

Tools

TypeScript

Python

Cloud platforms

Job description

Jack & Jill, a San Francisco-based VC-backed AI automation startup, is seeking a Founding Engineer to build the infrastructure for the next generation of AI-driven businesses. You will own the technical foundation, design agentic systems, and ship production code from day one in a fast-paced, in-person environment.

As the first engineering hire, you will set engineering standards, help recruit the team, and work with elite hardware and a generous model budget to turn ambitious plans into