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Engineering Full-Time
Mason AI

Founding AI Engineer (US)

Mason AI • San Francisco, CA

Company

Mason AI

Annual salary

$165k – $210k/yr

Location

San Francisco, CA

Listed

68d ago

Experience:
3 to 8 years
Workplace:
5 days in-office in San Francisco, CA
Equity:
0.75-2%

On-site in San Francisco, CA.

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About this Role

We are looking for a Founding AI Engineer with 2-8 years of experience to join a mission-driven team automating architecture to solve the housing crisis. You'll work at the frontier of agentic AI for the built world, running high-autonomy experiments to improve multimodal agents that check blueprints for building code compliance, your work will directly impact how fast apartments get built in America.

What will you be doing?
• Generate hypotheses and run time-boxed experiments to improve the accuracy of multimodal AI agents
• Reflect on experiment results and update mental models to direct your own research roadmap
• Work on supervised fine-tuning, model distillation, auto-research, retrieval tasks, and context engineering
• Run computer vision evals and build internal tooling to accelerate experimentation
• Talk to users and dogfood the product weekly

What you need

  • Highly autonomous and self-directed, able to manage your own workload and generate experiments without being told what to do
  • Daily usage of AI coding tools (e.g., Claude Code, Cursor, or similar)
  • Blends SWE speed with ML rigor, not too researchy, not lacking experimentation skills
  • Must work in-person 5 days/week in San Francisco
  • Resonates with the mission of solving the housing crisis and wants to work at a seed-stage startup

Frequently Asked Questions

How do I apply for the Founding AI Engineer (US) role at Mason AI? +

Use the Apply for a referral button on this page to send us your LinkedIn and CV. If your experience fits, we'll introduce you to the recruiter filling this role. They'll email you to check you're interested, then put you forward for this job or others that suit you better. It's free.

What does this Mason AI role pay? +

The listing gives $165k – $210k/yr.

Is this role remote? +

The listing gives the location as San Francisco, CA. 5 days in-office in San Francisco, CA.

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