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Added 20 mins ago
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Senior Machine Learning Engineer
BuzzClan
Toronto, ON
- Contract
Job Title: Machine Learning Engineer – Senior
Added 21 mins ago
PR
Corporate Planning Engineer
Parex Resources
Calgary, AB
- Full-time
Our Capital Markets & Corporate Planning team is seeking an Engineer with Operations and Development Planning background, to report to the Team Lead Corporate Planning, in the capacity of…
Added 36 mins ago
AC
Senior Presales Solutions Architect, AWS
Adastra Corporation
Markham, ON
- Full-time
Adastra Canada is looking for a senior technologist to be the firm's AWS champion inside the Presales team. This is a customer-facing role for someone who has spent years building on AWS,…
Added 50 mins ago
P
Senior Data Warehouse Developer
Pinnacle
Toronto, ON
- Full-time
As a senior data engineer, you will design, implement, and optimize the full-stack data infrastructure - from Snowflake clusters setup to data ingestion, transformation and report…
Added 50 mins ago
QA
Data Engineer II - QuantumBlack, AI by McKinsey
QuantumBlack, AI by McKinsey
Toronto, ON
- Full-time
Added 50 mins ago
EN
Program Manager
Extreme Networks
Toronto, ON
- Full-time
Added 1 hour ago
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Principal AI/ML Engineer
lululemon
Vancouver, BC
- Full-time
…delivery of a trusted unified data foundation, AI-driven data analytics and insights, and AI solutions across lululemon’s vertically integrated retail ecosystem, while embedding strong data…
Added 1 hour ago
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Platform Engineer
Hays
Toronto, ON
- Contract
The customer is looking for a Senior, hands-on Azure Platform Engineer with strong platform expertise across Azure Databricks, Azure Data Factory, Terraform, GitHub Actions, networking,…
Added 1 hour ago
TI
Machine Learning Engineer - Senior
TekStaff IT Solutions
Toronto, ON
- Contract
TekStaff's Client has a current vacancy for " Machine Learning Engineer - Senior”
Added 1 hour ago
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Principal Product Manager, Agent Intelligence
Equinix
Toronto, ON
- Full-time
A systems engineering background: several years building or operating distributed systems, data platforms, infrastructure or ML systems as an engineer, or equivalent hands-on depth
Added 1 hour ago
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Data Science Developer - Senior/Senior Data Scientist / ML Engineer
ThoughtStorm
Toronto, ON
- Contract
Strong hands-on experience in Data Science, Advanced Analytics, Predictive Modelling, and Machine Learning.
Added 2 hours ago
RC
Renewable Energy Engineer (Entry-Level)
Renewable Careers
Toronto, ON
- $80,000 to $110,000 CAD / year
- Full-time
…are expanding our Toronto team and looking for an entry-level engineer who wants to help build Canada's clean energy…
Added 2 hours ago
O
Senior Business Development Advisor
Ovintiv
Calgary, AB
- Full-time
The Senior Business Development Advisor will be a key part of the Corporate Development team with primary responsibility for financial modeling of potential mergers, acquisitions/investment…
Added 2 hours ago
AS
Senior Data Developer
AgileGrid Solutions
Canada
- Full-time
We are seeking a Senior Data Developer (Engineer) to help build the data foundation for Contact Distributor, Intact’s new platform for broker and distributor master data. This platform will…
Added 2 hours ago
IC
Senior Data Engineer
Infotek Consulting Inc.
Toronto, ON · Greater Toronto Area, Canada
- $70 to $100 CAD / hour
- Contract
Senior Data Engineer (Azure, Databricks, PySpark) | Talent Community
Added 2 hours ago
S
AI Engineer - Senior Consultant
Slalom
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Job Title: Senior Consultant – AI Engineer (Vacant Role)
Added 2 hours ago
ZL
Aerospace Quality Engineer
Zapnix LLC
Montreal, QC
- Full-time
Support the Program Lead in escalating blockers that require senior customer authority to resolve
Added 3 hours ago
T
Analytics Engineer
Tantalus
Burnaby, BC
- Full-time
Tantalus is seeking an early-career Analytics Engineer to join our Customer Operations team, reporting to the Senior Director, Customer Experience.
Added 3 hours ago
A
Principal MCP/AI Developer
Autodesk
Toronto, ON · ON · AMER - Canada - Ontario - Toronto - University Ave
- Full-time
…responsible and reliable AI, and multiplies the impact of every engineer on the…
Added 3 hours ago
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Applied AI Test Engineer - Intern
Plusgrade
Toronto, ON · CAN - Toronto
- Full-time
Working under the direction of a Senior SDET on the Applied AI Engineering team, you will build and maintain automated test suites that safeguard production machine learning pipelines and…
Added 3 hours ago
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Applied AI Engineer Intern
Plusgrade
Toronto, ON · CAN - Toronto
- Full-time
Working closely with a senior mentor, you will build and operate the production inference services that serve machine learning models across our partner ecosystem in real time. Your day to…
Added 3 hours ago
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Facility Reliability & Integrity (FRI) Planner
TC Energy
Calgary, AB
- Full-time
…alternatives where applicable, communicate trade offs, and influence senior stakeholders without direct…
Added 3 hours ago
SI
Contract Data Engineer
SapienX Inc.
Toronto, ON · Greater Toronto Area, Canada
- Contract
This opportunity is especially well suited to a mid-to-senior or senior Data Engineer who:
Added 3 hours ago
O
Senior Business Development Advisor
Ovintiv
Calgary, AB
- Full-time
The Senior Business Development Advisor will be a key part of the Corporate Development team with primary responsibility for financial modeling of potential mergers, acquisitions/investment…
Added 4 hours ago
A
Data Analytics Lead
Altis
Markham, ON
- $110,000 to $125,000 CAD / year
- Full-time
Our client, a well-established organization in the corporate sector, is seeking a Senior Data Engineer / Senior BI / Analytics Engineering Lead to design, build, and optimize scalable data…

Plusgrade

Applied AI Test Engineer - Intern

Toronto, ON, Canada
CAN - Toronto, Canada

Full-time

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Job details

Job type: Full-time
Posting language: English
Posted: Nov 4, 2026

Original job description

Employment Type:

Intern (Fixed Term) (Trainee)

Job Description:

QA Test Engineer Co-op

Testing machine learning pipelines and autonomous agents is completely different from testing deterministic software, and our team needs someone who wants to break live AI systems, catch hallucinations, and ship resilient test automation.

What You'll Be Doing

Working under the direction of a Senior SDET on the Applied AI Engineering team, you will build and maintain automated test suites that safeguard production machine learning pipelines and agentic AI systems. You will spend your days testing model-serving endpoints, validating data schemas, asserting against non-deterministic agent workflows, and developing Python utilities that stress-test edge cases before code ships. Coding agents and LLM tooling handle the initial test scaffolding and data synthesis, allowing you to focus your attention on triaging complex failures and verifying fallback paths. Everything you test and automate directly unblocks live releases across critical initiatives powering travel pricing and partner commerce.

The Stack

Python · pytest · Postman · Locust · k6 · Airflow · Dagster · Prefect · MLflow · Weights & Biases · dbt · Spark · Docker · Kubernetes · AWS · GCP · GitHub Actions · GitLab CI · Jenkins · Git

What You Bring

You get up to speed quickly on unfamiliar systems and complex codebases, understanding how components connect and becoming productive on active production suites without needing hand-holding.
You have hands-on experience designing, writing, and maintaining automated tests, with a strong understanding of test case design, defect tracking, and regression prevention.
You write clean, functional Python for test automation and scripting, and you are comfortable building utilities, data-setup scripts, or running API tests with tools like pytest or Postman.
You understand that machine learning models and AI agents fail differently from traditional deterministic code, and you are eager to test data contracts, pipeline reproducibility, and edge cases where output legitimately changes between runs.
When it comes to AI, you already rely on coding assistants and LLMs to generate test scaffolding, write scripts, or inspect errors, with the sharp judgment to catch hallucinations, verify assertions, and reject code that falls short.

Why Plusgrade

Travel is about the moments that make a journey feel personal. At Plusgrade, we build the technology that makes those moments possible, from upgrade offers and loyalty experiences to revenue tools used by 575+ airline, hospitality, cruise, rail, and financial services partners worldwide.

The work is global, complex, and rewarding. You will solve meaningful problems, take ownership from idea to outcome, and work alongside people who are smart, curious, and committed to doing great work.

We also give our teams access to AI tools and the encouragement to use them thoughtfully, to move faster, explore ideas, and build better ways of working.

We trust our teams to do their best work. That means autonomy, flexibility, and room to grow.

Come help us shape the future of travel.

What You'll Love About Us

🏦 RRSP Matching · 🏥 Comprehensive Health Plans · 📅 Flexible Paid Time Off · ✈️ Travel Experience Perk · 🧘 Annual Wellness Perk · 🚆 Commuter Perk · 🌅 Tenure-Based Work From Anywhere Program · 🍼 Parental Leave Top Up · 🌍 Adventure Pass · 🎓 Learning Allowance

Our Process

We believe every candidate deserves a fair, transparent experience, so regardless of outcome, everyone gets feedback.

Our process: Recruiter call → Hiring Manager interview → Final interview.

Plusgrade is an equal-opportunity employer committed to accessible recruitment. We welcome applications from all qualified individuals regardless of gender identity or expression, race, ethnic origin, creed, place of origin, age, sex, marital status, physical or mental disability, sexual orientation, or any other category protected by law. Accommodation is available upon request. We may use AI-assisted tools to help screen and assess applicants for this role. This posting is for an existing vacancy.

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More about this job

Responsibilities

You will build and maintain automated test suites to safeguard production machine learning pipelines and agentic AI systems. Your role involves triaging complex failures, verifying fallback paths, and developing Python utilities to stress-test edge cases.

Requirements

You should have hands-on experience designing and maintaining automated tests with a strong understanding of test case design and defect tracking. Proficiency in Python and familiarity with AI/LLM tooling for test scaffolding are essential for this role.

Skills

Python
Pytest
Postman
Locust
K6
Airflow
Dagster
Prefect
MLflow
Weights & Biases
Dbt
Spark
Docker
Kubernetes
AWS
GCP

Benefits

RRSP Matching
Comprehensive Health Plans
Flexible Paid Time Off
Travel Experience Perk
Annual Wellness Perk
Commuter Perk
Tenure-Based Work From Anywhere Program
Parental Leave Top Up
Adventure Pass
Learning Allowance

Visa sponsorship

Not detected in the job text

Keywords

Applied AI
QA Test Engineer
Machine Learning Pipelines
Autonomous Agents
Test Automation
Python
Pytest
Postman
Locust
K6
Airflow
Dagster
Prefect
MLflow
Weights & Biases
Dbt
Spark
Docker
Kubernetes
AWS
GCP
GitHub Actions
GitLab CI
Jenkins
Git
Data Schemas
Regression Prevention
LLM Tooling
API Testing
Data Synthesis

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