Founding Full Stack Software Engineer (Backend-focus)

AI Startup · Toronto, Canada (In-Person downtown Toronto) About Us We're solving one of the largest problems in the physical world: housing that's too slow and too expensive to build. The $2 trillion construction industry runs on human expertise that doesn't scale - so we're building the AI that understands what to build and how to build it. We start with the costliest problems for general contractors - the multi-million-dollar decisions that Claude cannot solve. Tyce Agent wins more projects and estimates costs on multi-million-dollar builds live at one of the landmark construction companies today. We just closed a 7-figure round and are hiring to build the best AI platform for construction. We offer competitive salary and equity. What You'll Do You'll own the backbone: the APIs, data model, integrations, and systems that everything else stands on. A true generalist who's happiest owning a problem end-to-end. · Build core backend systems in FastAPI + PostgreSQL - APIs, data model, auth, org/permissions. · Handle the but critical parts: security, multi-tenancy, reliability, observability. · Drop into the frontend (React / TypeScript) whenever the product needs it. · Ship new features day-to-day alongside the founders and make real architectural decisions. We're on a modern, lean stack: React Router framework, TypeScript, FastAPI, PostgreSQL, Pydantic-AI, Logfire, AWS. Required Qualifications · Mid-to-senior level of engineering experience. · Expert in Python; strong in TypeScript / React. · Have shipped and maintained real backend systems in production. · Go-getter mindset, personal agency, fast learner, excellent verbal and writing skills. · Full-time, in-person downtown Toronto Nice-to-have Qualifications Having any of these is a strong plus — tell us your superpower: · Built B2B apps with security, authentication, org structure, and third-party integrations. · AWS experience. · Built integrations with APIs like Google Drive, Sharepoint, etc... · Worked with AI agents and understand the plumbing around LLMs. · Product sense and general design thinking. · Competitive programmer (e.g. ACM ICPC). Check us out at https://www.tyce.ai/

The engineer will own the backend infrastructure, including APIs, data models, and system integrations using FastAPI and PostgreSQL. They will also contribute to the frontend using React and TypeScript to ship new features and make architectural decisions.

Candidates must be mid-to-senior level engineers with expert Python skills and strong proficiency in TypeScript and React. Experience shipping production backend systems and a go-getter mindset are required for this in-person role in Toronto.

• Equity

• PostgreSQLPreferred
• ReactPreferred
• TypeScriptPreferred
• Amazon Web ServicesPreferred
• PythonPreferred

Identified from the job description. Confirm important requirements above.

• Python
• TypeScript
• React
• FastAPI
• PostgreSQL
• AWS
• API Design
• System Architecture
• B2B Application Development
• LLM Plumbing
• Security
• Multi-tenancy

• Software
• Technology
• Engineering
• Construction
• Data & Analytics

Minimum experience

5+ years

Apply by

Feb 2, 2027

Posting language

English

Working hours

40 hours per week

Seniority

Mid-Senior level