Founding AI Engineer

Mason AI • San Francisco, CA

1d • Onsite

About The Position

Mason AI builds agentic AI that checks blueprints for buildability, safety, and building-code compliance. The Founding AI Engineer will improve the accuracy of the company's multimodal agents, working on cutting-edge techniques for optimizing AI agents as well as spatial reasoning and computer vision. The work is expected to affect the built environment of California within the first month and contribute to Mason's product and growth.

More than 50% of the role will focus on improving the accuracy of multimodal agents that check blueprints for building-code compliance, including post-training models and autoresearch. The engineer will also take on work across lightweight data engineering, coding-agent workflows, internal tooling, the web application, and new agents that extend the product to commercial and multifamily housing across the country. The role includes weekly user conversations. In-person work is required.

Requirements

• At least 3 years of experience as a software engineer.
• Ability to make mature architectural decisions for core modules.
• Willingness to use parallel workflows for lighter-weight work.
• Mission-oriented and interested in solving the housing crisis.
• Comfort with ownership, ambiguity, and unblocking oneself.
• Able to work in person.

Responsibilities

• Improve the accuracy of multimodal agents that check blueprints for building-code compliance; this will take more than 50% of working time.
• Work on post-training models and autoresearch.
• Take on work as needed across lightweight data engineering, coding-agent workflows, internal tooling, and the web application.
• Build new agents to extend the offering to commercial and multifamily housing across the country.
• Talk to users weekly.

Benefits

• Competitive salary of $160,000–$210,000.
• Generous early-stage equity of 0.75%–2%.
• Free lunch and dinner at the office.
• Fully paid health insurance, with over $1,000 per year in employer contributions to an HSA.
• 401(k) plan that accepts pre-tax and Roth contributions.
• Commuter benefits account.
• Monthly wellness benefit.
• Opportunity to shape the future of the country.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed