Senior Backend & Platform Engineer: AI Memory & LLM Agents

HRB; Canada; Remote; CAD 120,000 - 180,000; Full time

Job summary

HRB is building an AI organizational memory system and seeks a senior backend/platform engineer to own foundational systems, architect scalable backends, and ship production LLM agents. You will set technical direction in an early-stage environment and drive high-impact projects with minimal guidance, collaborating with the founding team on enterprise engagements.

The role requires 5+ years of backend experience, strong ownership of systems at scale, and comfort shaping architecture and tooling

Qualifications

• 5+ years of backend/platform engineering experience, including pre-AI era systems work.
• Track record of owning and operating systems at meaningful scale.
• Comfort setting technical direction on ambiguous, high-impact projects.
• Bonus: founding experience or production experience building LLM agents / RAG systems.

Responsibilities

• Architect and build the core backend and platform systems that everything else depends on.
• Design and ship reliable LLM agents / RAG systems that reason over complex organizational data.
• Make foundational decisions on architecture, infrastructure, data, and tooling while raising the engineering bar.
• Own high-risk, high-impact projects end-to-end with minimal hand-holding (fire-and-forget style).
• Work closely with the founding team to support growing enterprise engagements (hundreds to thousands of employees).

Skills

Backend design

System ownership

RAG familiarity

Architectural leadership

Tools

Python

SQL

Distributed Systems

API Design

Job description

HRB is building an AI organizational memory system and seeks a senior backend/platform engineer to own foundational systems, architect scalable backends, and ship production LLM agents. You will set technical direction in an early-stage environment and drive high-impact projects with minimal guidance, collaborating with the founding team on enterprise engagements.

The role requires 5+ years of backend experience, strong ownership of systems at scale, and comfort shaping architecture and tooling