Ontario Data annotation Jobs – 52 Openings This Week

AI Annotation Specialist Data Science - AI Trainer
DataAnnotation —Guelph, ON
- $50.00–$140.56 an hour
- Contract
- Remote
- Doctoral degree
- Computer Science
- Writing skills
- Flexible schedule
Quick apply
AI Annotation Specialist Data Science - AI Trainer
DataAnnotation —St. Catharines, ON
- $50.00–$140.56 an hour
- Contract
- Remote
- Doctoral degree
- Computer Science
- Writing skills
- Flexible schedule
Quick apply
AI & Robotics Intern
Trench —Scarborough, ON
- $22–$30 an hour
- Computer Science
- Engineering
- C++
Research Coordinator I RADIS Research and Simulation Lab
Unity Health Toronto —Toronto, ON
- $39.11–$48.89 an hour
- Temporary
- Computer science
- Computer Science
- Engineering
Member of Technical Staff - Data
Veeda AI —Toronto, ON
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Bachelor's
Quick apply
13d
Applied Data Scientist, Health AI Evaluation & Datasets
Innodata Inc. —Toronto, ON
- $210,000–$240,000 a year
- Remote
- Medicine
- Doctoral degree
- Computer Science
Quick apply
Backend Engineer – Data Ingestion & APIs, Kitchener, ON
Siemens —Kitchener, ON
- $100,000–$130,000 a year
- Full-time
- Hybrid work
- Computer science
- Computer Science
- Engineering
- Profit sharing
Frontend / UX Engineer - Robotics Data Operations, Kitchener, ON
Siemens —Kitchener, ON
- $85,000–$130,000 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Master's degree
- Profit sharing
Solution Architect-5
Realign LLC —Toronto, ON
- $125,655 a year
- Full-time
- Azure
- Computer Science
- Java
9h
Data Discovery and Enrichment Expert II (Canada Hybrid or Remote)
LexisNexis —Toronto, ON
- $68,100–$113,600 a year
- Full-time
- Remote
- Microsoft Powerpoint
- Research
- Presentation skills
- Disability insurance
- Tuition reimbursement
Data Discovery and Enrichment Expert II (Canada Hybrid or Remote)
RELX —Toronto, ON
- $68,100–$113,600 a year
- Full-time
- Remote
- Microsoft Powerpoint
- Research
- Presentation skills
- Disability insurance
- Tuition reimbursement
Applied Data Scientist, Finance AI Evaluation & Datasets
Innodata Inc. —Toronto, ON
- $210,000–$245,000 a year
- Call to connect
- Remote
- Master's degree
- SQL
- No university degree
Quick apply
Voice Actor - Freelance AI Trainer Project
Meridial —Ottawa, ON
- $6–$65 an hour
- Remote
- AI
- Communication skills
- Paid time off
Junior Implementation Specialist
P&P Optica —Waterloo, ON
- $50,000–$52,000 a year
- Hybrid work
- Research
- Bachelor's
- Travel
- Dental care
- Work from home
Medical Editor
Klick Health —Toronto, ON
- $70,000–$80,000 a year
- Full-time
- Hybrid work
- Medicine
- Doctoral degree
- Master's degree
Machine Learning Analyst
Fidelity Investments —Toronto, ON
- $105,000–$129,000 a year
- Full-time
- Computer Science
- Engineering
- Research
- Tuition reimbursement
- Paid time off
Sr Data Scientist II
LexisNexis —Toronto, ON
- $108,100–$158,100 a year
- Software troubleshooting
- Machine learning
- AI
- Flexible schedule
10d
Sr Data Scientist II
RELX —Toronto, ON
- $108,100–$158,100 a year
- Software troubleshooting
- Machine learning
- AI
- Flexible schedule
10d
Copy of CFD & Aerodynamic Engineer (AI Training & Evaluation)
Lifted, an Upwork Company™ —Ottawa, ON
- $80–$110 an hour
- Contract
- Remote
- Engineering
- English
- Bachelor's
- Flexible schedule
Quick apply
Senior Implementations Specialist, Smart Imaging Systems
P&P Optica —Waterloo, ON
- From $58,500 a year
- Hybrid work
- Research
- Travel
- Mentoring
- Dental care
- Work from home

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data annotation jobs near ontario

AI Annotation Specialist Data Science - AI Trainer

DataAnnotation -
Guelph, ON

Quick apply

Job details

Contract | Fixed term contract
$50.00–$140.56 an hour

Qualifications

Statistics
Predictive analysis
Statistics
Doctoral degree
Computer Science
Predictive modeling analysis
Writing skills
Engineering
Mathematics
English
Master's degree
Bachelor's
Quantitative modelling analysis
A/B testing
Data science
AI
Performing statistical data analysis

Full job description

DataAnnotation is committed to creating quality AI. Help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule.

We are looking for an existing AI Annotation Specialist Data Science - AI Trainer to help train AI models. AI models are increasingly capable of performing complex analytical and scientific reasoning — but these systems still need practitioners with real-world quantitative experience to validate whether the outputs actually hold up in practice. That's where you come in.

You'll work closely with state-of-the-art AI models on tasks like evaluating AI-generated quantitative analysis, solving technical problems, and providing feedback that directly shapes how these systems reason about data, models, and scientific problems. Whether your background is in data science, astrophysics, economics, biostatistics, operations research, or any other quantitative field, if you think rigorously about data and models, your skills are directly applicable here. You can fit this work alongside a full-time role, or treat it as your primary focus, choosing projects and schedules that align with your availability and goals.

To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass, you'll receive an email confirmation, and paid work will become available on our platform.

Advantages of contracting with us:

Fully remote: work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible schedule: choose which projects you take on and when you work, on your own computer, from the comfort of your own home.
Competitive pay: projects are paid hourly at $50 to $100 USD per hour, with bonus rates available on some projects.
Impact: help shape the future of AI systems built to reason about data and analytics.

Responsibilities:

Evaluate AI-generated quantitative work, including statistical analysis, predictive modeling, scientific reasoning, and data-driven insights, for technical accuracy and real-world validity.
Design and solve quantitative problems used to train and benchmark AI systems, spanning areas like forecasting, experimental analysis, optimization, and statistical inference.
Write clear technical explanations and well-documented analytical code.
Provide feedback that directly shapes the next generation of AI models built for quantitative reasoning.

Qualifications:

3+ years of hands-on experience in a quantitative role or research environment — such as data science, statistics, economics, finance, physics, biology, epidemiology, operations research, or any adjacent field.
Some coding experience required, with comfort writing and reviewing analytical code end-to-end.
Practical experience with statistical methods, predictive modeling, and experiment design (e.g., A/B testing, hypothesis testing, regression, classification, time-series forecasting).
Fluency in English (native or bilingual level) with strong writing skills.
A bachelor's degree in a quantitative field preferred (Statistics, Computer Science, Mathematics, Engineering, or similar); an advanced degree (Master’s or PhD) is a plus.
Relevant credentials are a plus (e.g., Kaggle Competition ranking, AWS/GCP ML certifications, or equivalent demonstrated expertise).

Note: Payment is made via PayPal. We will never ask for any money from you. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand.

Quick apply

Refine Your Search

data annotation jobs in ontario

AI Annotation Specialist Data Science - AI Trainer

AI Annotation Specialist Data Science - AI Trainer

AI & Robotics Intern

Research Coordinator I RADIS Research and Simulation Lab

Member of Technical Staff - Data

Applied Data Scientist, Health AI Evaluation & Datasets

Backend Engineer – Data Ingestion & APIs, Kitchener, ON

Frontend / UX Engineer - Robotics Data Operations, Kitchener, ON

Solution Architect-5

Data Discovery and Enrichment Expert II (Canada Hybrid or Remote)

Data Discovery and Enrichment Expert II (Canada Hybrid or Remote)

Applied Data Scientist, Finance AI Evaluation & Datasets

Voice Actor - Freelance AI Trainer Project

Junior Implementation Specialist

Medical Editor

Machine Learning Analyst

Sr Data Scientist II

Sr Data Scientist II

Copy of CFD & Aerodynamic Engineer (AI Training & Evaluation)

Senior Implementations Specialist, Smart Imaging Systems

I want to receive the latest job alerts for data annotation in ontario

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