Software Engineer

Founding AI Engineer | Onsite | California

Berkley Hunt is partnering with an early-stage startup building agentic AI for the built world. Their platform uses multimodal AI agents to check that building blueprints are buildable, safe and compliant with building codes, helping to accelerate construction and tackle the housing crisis.

Working closely with the founding team, you'll focus on improving the accuracy of their multimodal agents, tackling challenges at the cutting edge of agentic AI, spatial reasoning and computer vision. This is a true founding engineering opportunity, with your work directly shaping real-world construction projects within your first month.

What You'll Do

• Spend the majority of your time improving the accuracy of multimodal agents that check blueprints for building code compliance, including post-training models and running experiments against evals
• Build new agents that extend the product into commercial and multifamily housing across the US
• Contribute across the stack, from lightweight data engineering and internal tooling to improving the web application
• Set up and optimise the team's AI coding agents and workflows
• Speak with users weekly to understand their needs and shape the product
• Help establish a strong written engineering culture as the company scales

What We're Looking For

• 3+ years of software engineering experience, with the ability to make mature architectural decisions on core systems
• Strong hands-on experience using AI coding tools and parallel agent workflows
• A mission-driven mindset and genuine interest in improving housing and construction
• Comfortable with ambiguity, high ownership and unblocking yourself
• A pragmatic, experimental approach where speed and learning from failure are valued

Nice to Have

• Experience with multimodal AI, computer vision or spatial reasoning
• Experience post-training models or designing and running AI evaluations
• Background building internal tooling or developer productivity systems

Additional Details

• Onsite in California
• Salary: $160k–$210k plus generous early-stage equity (0.75%–2%)
• Fully paid health insurance, HSA contributions, 401(k), commuter and wellness benefits
• Free lunch and dinner in the office
• Lightweight interview process completed within around 2 weeks, including a hands-on AI coding interview and a paid 3-day work trial
• Founding engineering opportunity with significant ownership and impact

No Sponsorship Available