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Backend Software Engineering jobs in Canada

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1–2 jobs· newest first

Staff Machine Learning Engineer, AdTechNew
HelloFresh · Toronto, Canada
Hybrid · Full-time · Staff
Staff Machine Learning Engineer, AdTechNew
HelloFresh · Toronto, Canada
Hybrid · Full-time · Staff

+10K new in the last hour

Staff Machine Learning Engineer, AdTech

HelloFresh · Posted Nov 11, 2026

Toronto, Ontario, Canada
Hybrid
Full-time · Staff

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AI

Apply on careers page

Lead the engineering architecture of multi-agent AI systems, bridging the gap between data scientists and backend engineers to connect internal automation APIs, AI agents, and supporting ML models into a cohesive production platform.

Responsibilities

Design, build, and maintain production multi-agent AI systems and LLM workflows using modern orchestration frameworks such as LangChain and LangGraph.
Build the APIs, tool-calling interfaces, and MCP integrations that connect internal marketing automation services with AI agents and third-party platforms.
Partner with Data Scientists to take machine learning and statistical models from prototype into reliable production, and connect them to the agents that create, launch, and optimize ads.
Design end-to-end system architectures across models, databases, and backend services, optimizing for reliability, correctness, and long-running workflows at scale.
Build evaluation pipelines, guardrails, state management, and human-in-the-loop approval workflows to ensure AI and ML systems run safely in production.

Requirements

Nice to have: AdTech
Nice to have: MarTech
Nice to have: e-commerce growth
Nice to have: high-scale consumer platforms

Skills

Machine Learning Engineering AI Engineering Backend Software Engineering Python SQL API development LangGraph LangChain LLM agent orchestration tool use MCP A/B testing multi-agent systems multimodal AI models MLOps FastAPI Databricks Unity Catalog MLflow Docker AWS

Benefits

Box Discount
Health & Dental benefits from day 1
Health Spending Account
unlimited access to the Headspace app
25% discount on GoodLife fitness memberships

See full job description

Staff Machine Learning Engineer, AdTech

HelloFresh · Posted Nov 11, 2026

Toronto, Ontario, Canada
Hybrid
Full-time · Staff

Apply with RefersoAI Apply on careers page

Lead the engineering architecture of multi-agent AI systems for marketing optimization, bridging data scientists and backend engineers at HelloFresh.

Responsibilities

Design, build, and maintain production multi-agent AI systems and LLM workflows
Build APIs, tool‑calling interfaces, and MCP integrations
Partner with Data Scientists to productionize models
Design end‑to‑end system architectures
Build evaluation pipelines, guardrails, and human‑in‑the‑loop workflows

Skills

Machine Learning Engineering AI Engineering Backend Software Engineering Python SQL FastAPI API development software design testing database optimization

agent orchestration

context management

automated evaluations

experimentation

multimodal AI models

vision‑language models

predictive ML models

model monitoring

Benefits

Box Discount
Health & Dental benefits
Health Spending Account
Headspace app access
GoodLife fitness discount

See full job description