# Principal Builder at AI Fund

- Company: AI Fund
- What the company does: Co-founding companies together from idea to impact. AI Fund is a venture studio. We collaborate with entrepreneurs and corporate partners to create great companies that move humanity forward.
- Company website: https://aifund.ai
- Type: VC firms
- Level: Principal and up
- Location: Mountain View, California, US
- Work setup: On-site
- Pay: $230K to $275K base salary per year (USD)
- Posted: 2026-09-29
- Apply by: 2026-11-13
- Apply: https://jobs.lever.co/AIFund/b4498e9d-bc69-4da2-b88f-26968879adc2/apply
- Page: https://www.1752.vc/careers/jobs/ai-fund-principal-builder-2/

## About the role

A Principal Builder decides which bets are worth making. The core of the role is technical insight applied to business judgment: seeing how a deep tech idea can uniquely solve a market need, and bringing the intellectual heft that elite founders and corporate partners respect in a co-founder. You drive each idea forward until it's either falsified and ended, or handed to a newly formed company.

## What they're looking for

- Work with commercial partners, including corporates, VCs, and LPs, and with elite founders to identify, shape, and validate new company ideas
- Build the business case for ideas that hold up: market sizing, business model, go-to-market plan, and a clear written thesis for the company
- Decide which ideas to bet on, based on the size of the market opportunity and how uniquely AI can solve it
- Help recruit the founder. Explain the idea to potential founders and Engineers in Residence, and help bring the right person on to lead the Build
- Drive AI Fund's co-founding of companies with partners and founders, mainly through product, user, and go-to-market guidance during the 12-week Build
- Build the recommendation on whether AI Fund should invest at the end of the Build, then support the AI Fund partner on follow-on investment and portfolio support