Founding Engineer (Full Stack)

Who we are Tired of hearing about AI companies that build B2B Sales Software? If you’ve been told how AI is going to change the world but are disappointed to only see AI assistants that write emails, then we might be a fit. Field24 is a fast growing AI company that serves the physical-world industries that matter most. Starting with construction, you will see the users of our AI solution benefit in the physical world where the risk is high. Field24 accelerates commercial and infrastructure construction by making it more accessible. Our platform helps construction owners build retail stores like Walmart, restaurants like Burger King and more. We’re a venture-backed team that's led by founders that have worked at companies like Uber, Clutch, RBCx etc. The role You'll be joining as our first founding engineer and will work with us in person at our Toronto office to build our AI agent platform for construction. At its core it’s an agent harness customized around the work that contractors need to get done. You'll work on every part of the stack, from the harness itself to the web app our customers use every day. We're looking for someone who can take a loosely defined problem and run with it. You'll own features end to end: shaping the idea, shipping it, talking with customers, and supporting their use in production. What you'll do Build and extend our agent harness, including tools, skills, and how the agent reasons over construction workflows Ship features across the whole stack: the harness, evals, infra, sandboxes, and our web app Turn rough problems into a clear scope, then deliver them Help shape the product, tech, and the culture, early engineers set how we build and work together What we're looking for 2+ years of software engineering experience Highly motivated self-starter Experience building AI agents, skills, and tools AI-pilled, but not a slop cannon. You use AI heavily, and you still own the judgment and the quality of what ships. Strong problem solving and clear communication Interest in product design Customer-focused. You care whether what you build actually helps people. Nice to have TypeScript, React AWS, PostgreSQL Experience training and evaluating computer vision models AI engineering (evals, context management, prompt and tool design) Sandboxed execution environments How we hire Initial chat Co-founder interview Technical interview In-person paid work trial