Our client is a global deep tech holding company working across roughly 10 countries and 30 businesses, in areas like fintech, data, and mobility (think transport, logistics, and smart cities).

Most AI today is good at talking: answering questions, writing text, giving advice. Our client builds the part that's missing: AI that can act in the real world and run things, not just describe them. That matters most for the organisations that can't take risks with their data or their systems, like airports, banks, power grids, and governments. So our client builds AI that these organisations can fully own and control themselves, instead of relying on someone else's servers.

We are looking for a foundational engineer to work directly with leadership in defining system architecture and building the technical foundation of a recent platform. You will bridge the gap between business needs and technical implementation by defining high (architecture) to low (component) level design for extending, scaling, and maintaining our AI SDK.

This is a high leverage role where one engineer is expected to deliver the impact of multiple traditional roles through strong system thinking and AI-assisted development. You will be one of the first critical hires, helping shape both the system and the future team.





Requirements Responsibilities
Design systems across:
Architecture
Modules / Components / Containers
API contracts
Translate business needs into scalable and efficient technical systems
Use AI tools to:
Generate code
Critically review and validate outputs
Define and evaluate:
Testing strategies
Edge cases
Failure scenarios
Navigate and understand large codebases independently
Contribute to technical direction and hiring decisions

Requirements Must Have
10+ years of experience
Solid system design and architecture skills
Ability to deeply understand and critique complex systems
Robust grasp of testing in complex environments
Experience working with AI-assisted development workflows

Preferred Qualifications
Generalist background across multiple domains
Experience building systems from scratch
Demonstrated ability to handle ambiguity and complexity
Recent hands-on coding experience including agentic coding

Not a Fit If
You specialize in a single language or stack
You prefer execution over system thinking
You are not actively adapting to AI-driven development
You have been fully removed from hands-on work

📌 Senior Systems Engineer Montreal
🏢 Flatgigs
📍 Montreal