Founding Engineer

San Francisco on site Until 8/21/2026 First posted June 4, 2026 Last posted June 4, 2026
Job description

About the Role

Join a pre-seed AI startup as Engineer #4 on the founding team, working directly with the CTO and fellow founding engineers. This is a high-ownership, fast-paced role where you'll ship features to production daily and own entire product areas from concept to deployment. The company is building fully agentic systems that automate complex workflows — technically challenging, high-impact work at the earliest stage.

What You'll Do

  • Ship features to production on a daily cadence

  • Own end-to-end product areas from initial concept through deployment

  • Design, build, and consume REST APIs on the backend

  • Build scalable frontend interfaces with React

  • Integrate AI/ML capabilities using providers such as OpenAI or Claude

  • Collaborate closely with the CTO and founding team to define technical direction

  • Model and manage data using PostgreSQL and Supabase

What We're Looking For

Required:

  • Proficiency in full-stack development with TypeScript/JavaScript and Python

  • Backend experience with Node.js and REST API design/consumption

  • Frontend experience with React for building scalable UIs

  • Experience with PostgreSQL and Supabase for data modeling and storage

  • Hands-on experience integrating AI/ML features via providers like OpenAI or Claude

  • Ability to thrive in a founding-stage startup environment — owning features and shipping rapidly

  • Strong communication and cross-functional collaboration skills

  • Willingness to work on-site in San Francisco (hackerhouse environment) or commute as needed

Location & Work Arrangement

This role is based on-site in San Francisco, CA. The team works out of a shared hackerhouse/office environment. Visa sponsorship is available.

About this role

Summary

Build and deploy AI-driven full-stack features, collaborate with founding team, own product areas.

Job title

Founding Engineer

Experience level

entry level

Industry

software

Location requirements

On-site in San Francisco, CA; remote not allowed.

Salary

Not specified

Management role

No

Skills & keywords

Required skills

typescriptjavascriptpythonnode.jsrest APIreactpostgresqlsupabaseai integrationopenaiclaude

Preferred skills

None specified

Specializations

full-stackAI/MLreacttypescriptpython
Locations

Structured locations inferred from the posting.

San Francisco, CA, USA

On-site City