Full-stack engineer at Sidian, which builds an AI 'company brain' for engineering firms. Day to day: build Python/TypeScript backend services and APIs, orchestrate LangChain/LangGraph agents with RAG and human-in-the-loop controls, and own full-stack features from database design through React UI, testing, deployment, and monitoring. Hybrid role in Waterloo, Ontario.
Sidian is building the company brain for engineering firms. As a Full-Stack Engineer, you will own product development across the stack with a primary focus on backend architecture and agent orchestration.
What you will own
Build production Python and TypeScript services, APIs, data models, authentication, queues, and enterprise integrations.
Orchestrate LangChain and LangGraph agents, tools, retrieval, structured outputs, memory, evaluation, and human-in-the-loop controls.
Own full-stack features from database design through React interfaces, testing, deployment, and monitoring.
Connect BIM, drawings, spreadsheets, databases, cloud drives, and third-party systems.
What you bring
One to three years shipping production software, primarily as a backend engineer.
Strong TypeScript and Python, practical React, and sound software fundamentals.
Production experience with APIs, SQL, cloud infrastructure, background jobs, testing, and observability.
Hands-on experience with LangChain, LangGraph, RAG, tool calling, or similar LLM systems.
Evidence of initiative through a startup, product, open-source project, or independent production build.
High agency, urgency, and ownership. AEC experience is not required.
This is a full-time, hybrid role in Waterloo, Ontario.