Senior Full-stack AI Engineer

Role overview Build the full-stack infrastructure that lets AI agents carry out ongoing business workflows safely and reliably. This senior individual-contributor role combines hands-on engineering with architectural decisions, spanning agent execution and the underlying services needed to support a growing platform.

Responsibilities - Design and build agent session and communication systems, including persistent state and workflows that continue over time. - Develop platform primitives such as isolated compute, durable data storage, and secure credential handling. - Make agent actions dependable and safe, addressing risks such as prompt injection and unsafe outputs. - Work across the product stack to take infrastructure from early customer use toward a scalable platform. - Collaborate directly with the founding team, contributing code and shaping technical direction.

Requirements - Senior-level software engineering experience and willingness to work hands-on across the stack. - Strong judgment in designing and delivering production systems with limited process and evolving requirements. - A thoughtful approach to agent security, including credential isolation, output sanitization, and prompt-injection defenses. - Comfort making architectural decisions and solving open-ended problems in an early-stage environment. - Availability to work remotely in the Eastern time zone; Canadian candidates are preferred.

Benefits and work setup - Full-time, remote-first role with a stated salary range of CAD $200,000–$325,000, plus benefits and equity. - Direct influence on product and architecture, within a small team with low process overhead. - An annual week-long team gathering; the role description says the location varies.