Founding Engineer (Full Stack)

Field24; Toronto; On-site; CAD 110,000 - 160,000; Full time

Job summary

Field24 is seeking its first founding engineer to join in Toronto and build an AI agent platform for construction. You’ll work in person at our Toronto office, owning features end to end—from harness to the customer web app—and turn loosely defined problems into concrete, shippable solutions.

You’ll collaborate with customers, shape product direction, and help establish our early engineering culture, processes, and quality standards. This role requires initiative and a passion for practical AI.

Qualifications

• 2+ years of software engineering experience.
• Highly motivated self-starter.
• Experience building AI agents, skills, and tools.
• You use AI heavily, and you still own the judgment and the quality of what ships.
• Strong problem solving and clear communication.
• Customer-focused; you care whether what you build helps people.

Responsibilities

• Build and extend the 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 the 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.

Skills

Software engineering

Self-starter

AI agents

AI tooling

Problem solving

Communication

Customer focus

Tools

TypeScript

React

Job description

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 Walmarts, 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


• Customer-focused. You care whether what you build actually helps people.

Nice to have

• TypeScript, React


• Experience training and evaluating computer vision models


• AI engineering (evals, context management, prompt and tool design)