Toronto On Scientist Jobs – 191 Openings This Week

Machine Learning Scientist - AI Trainer
DataAnnotation —Thornhill, ON
- $70.78–$141.56 an hour
- Contract
- Remote
- Bilingual
- Doctoral degree
- Computer Science
- Flexible schedule
Quick apply
1d
Lead Scientist - Applied ML
Canadian Tire Corporation, Ltd. —Toronto, ON
- $79,000–$131,000 a year
- Full-time
- SQL
- In-person
- Python
- Store discount
- Profit sharing
Quick apply
Bioinformatics Scientist
Geneseeq Technology Inc. —Toronto, ON
- $75,000–$90,000 a year
- Full-time
- Doctoral degree
- Data analysis skills
- Machine learning
- Disability insurance
- Dental care
Quick apply
7d
Founding Research Scientist – AI Thermal Management
Auvrix Energy —Toronto, ON
- Full-time
- Hybrid work
- Doctoral degree
- Engineering
- Research
- Work from home
Quick apply
3d
Environmental Scientist - 456
MTE Consultants Inc. —North York, ON
- $64,000–$80,000 a year
- Full-time
- AutoCAD
- Engineering
- Bachelor's
- Wellness program
- Mileage reimbursement
Quick apply
Data Analytical Specialist/Scientist - Senior
Bevertec —Toronto, ON
- $70–$75 an hour
- Hybrid work
- Azure
Quick apply
Clinical Research Scientist II - Delivery Sciences – Global
DECIEM —Toronto, ON
- $70,000–$80,000 a year
- Full-time
- Hybrid work
- Master's degree
- Bachelor's
- Organizational skills
- Paid time off
- Employee assistance program
Forensic Scientist
Ministry of the Solicitor General —Toronto, ON
- $1,655.00–$2,134.54 a week
- Bilingual
- Word processing
- Laboratory experience
5d
Applied Machine Learning Scientist I
TD Bank —Toronto, ON
- $105,500–$125,000 a year
- Full-time
- Bachelor's
- Machine learning
- Financial services
- Paid time off
11d
Biotech Scientist - Chromatography
SGS —Mississauga, ON
- $34–$44 an hour
- Full-time
- Doctoral degree
- Master's degree
- Bachelor's
- Dental care
- Paid time off
Quick apply
Data Scientist
FutureFit AI —Toronto, ON
- $100,000–$155,000 a year
- Full-time
- Remote
- SQL
- AWS
- Travel
RQ00209 - Int. Data Analytical Specialist/Scientist
Source Code —Toronto, ON
- $49.28–$66.00 an hour
- Full-time
- Microsoft Excel
- Data analysis skills
- Microsoft Office
Quick apply
4d
Applied AI Scientist (Hybrid)
Homebase —Toronto, ON
- $108,000–$130,000 a year
- Full-time
- Hybrid work
- SQL
- Machine learning
- AI
- Designated paid holidays
- Disability insurance
Scientist III
Unity Health Toronto —Toronto, ON
- $82.40–$122.20 an hour
- Full-time
- Medicine
- Doctoral degree
- Research
- Disability insurance
- Dental care
Data Scientist
illumin —Toronto, ON
- $120,000–$140,000 a year
- Full-time
- Hybrid work
- Microsoft Excel
- Computer Science
- SQL
- Disability insurance
- Dental care
Quick apply
Research Scientist
OTI Lumionics Inc. —Mississauga, ON
- $75,000–$110,000 a year
- Full-time
- Doctoral degree
- Engineering
- Project management
Data Scientist
Ample Insight Inc. —Toronto, ON
- Full-time
- Remote
- Computer science
- Doctoral degree
- Computer Science
Quick apply
Data Scientist II
Scribd, Inc. —Toronto, ON
- $118,000–$150,000 a year
- Full-time
- Computer Science
- Master's degree
- SQL
- Disability insurance
- Dental care
4d
Research Associate I
University Health Network —Toronto, ON
- $37.85–$56.77 an hour
- Full-time
- Doctoral degree
- Education
- Teaching
Quick apply
5d
Research Associate
SE Health —Markham, ON
- $69,000–$87,000 a year
- Temporary
- Hybrid work
- Data analysis skills
- Research
- Master's degree

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Machine Learning Scientist - AI Trainer

DataAnnotation -
Thornhill, ON

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Job details

Contract | Fixed term contract
$70.78–$141.56 an hour
1 day ago

Qualifications

Bilingual
Statistics
Doctoral degree
Computer Science
Writing skills
Engineering
Mathematics
English
Google Cloud Platform
Master's degree
AWS
Bachelor's

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 Machine Learning Scientist - 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, up to $60 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

scientist jobs in toronto on

Machine Learning Scientist - AI Trainer

Lead Scientist - Applied ML

Bioinformatics Scientist

Founding Research Scientist – AI Thermal Management

Environmental Scientist - 456

Data Analytical Specialist/Scientist - Senior

Clinical Research Scientist II - Delivery Sciences – Global

Forensic Scientist

Applied Machine Learning Scientist I

Biotech Scientist - Chromatography

Data Scientist

RQ00209 - Int. Data Analytical Specialist/Scientist

Applied AI Scientist (Hybrid)

Scientist III

Data Scientist

Research Scientist

Data Scientist

Data Scientist II

Research Associate I

Research Associate

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