Top 81 Data scientist Jobs in Ontario Ca

Marketing Data Scientist - AI Trainer
DataAnnotation —Pomona, CA
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Senior Data Scientist - AI Trainer
DataAnnotation —California
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- 3 years
- Flexible schedule
Quick Apply
Data Scientist I
Miovision —Ontario, CA
- $85,000 - $95,000 a year
- Full-time
- Remote
- Writing skills
- Master's degree
- SQL
- Health insurance
- 401(k) matching
Quick Apply
DATA SCIENTIST I–FINANCIAL & TIME SERIES FORECASTING
VSolvit —Norco, CA
- $34.62 - $45.67 an hour
- Computer Science
- Finance
- SQL
- Health savings account
- Disability insurance
Quick Apply
7d
Data Scientist
Gustaine —Orange, CA
- Computer Science
- Java
- Math
Senior Data Analyst (AR)
Panda Restaurant Group —Rosemead, CA
- $90,000 - $126,500 a year
- Email
- Hybrid work
- 5 years
- Finance
- Bachelor's degree
- AD&D insurance
- Disability insurance
Quick Apply
Data Scientist for Analytics (Engineer/Scientist Support)
CACI —Norco, CA
- $69,600 - $142,700 a year
- Full-time
- Mid-level
- Office
- Analysis skills
- Health insurance
Senior Research Data Analyst
University of California, Riverside —Riverside, CA
- $84,100 - $159,400 a year
- Full-time
- ERP systems
- Mid-level
- SQL
Senior Data Analyst
PM2CM —Pomona, CA
- $105,000 - $115,000 a year
- Full-time
- Hybrid work
- Computer Science
- Office
- Analysis skills
- Health insurance
Quick Apply
Data Analyst Sr, Finance - Encounter Data (Covered California)
CalOptima —Orange, CA
- Weekends as needed
- Background check
- Microsoft Outlook
- Writing skills
- Tuition reimbursement
- Paid time off
12d
Manufacturing Data Scientist
TriMas Corporation —City of Industry, CA
- $100,000 - $135,000 a year
- Full-time
- Computer Science
- ERP systems
- SQL
- Disability insurance
- Health insurance
Quick Apply
DATA SCIENTIST II
VSolvit —Norco, CA
- $115,000 - $130,000 a year
- Azure
- Computer Science
- DevOps
- Health savings account
- Disability insurance
Quick Apply
12h
DATA SCIENTIST II–FINANCIAL & TIME SERIES FORECASTING
VSolvit —Norco, CA
- $95,000 - $120,000 a year
- Computer Science
- Mid-level
- Office
- Health savings account
- Disability insurance
Quick Apply
7d
Machine Learning Research Scientist — Game Systems & Player Modeling (Chinese Mandarin Speaker)
Bitus Labs —Irvine, CA
- From $100,000 a year
- Full-time
- Computer Science
- Office
- AWS
- Health insurance
- Dental insurance
Quick Apply
Research Scientist — Mathematics & Statistics (Chinese Mandarin Speaker)
Bitus Labs —Irvine, CA
- From $100,000 a year
- Full-time
- Master's degree
- Math
- Continuous improvement
- Paid parental leave
- Health insurance
Quick Apply
Machine Learning Engineer (Agent & Inference) - (Chinese Mandarin Speaker)
Bitus Labs —Irvine, CA
- From $130,000 a year
- Full-time
- Azure
- Computer Science
- 3 years
- Health insurance
- Dental insurance
Quick Apply
Principal Data Scientist - AI Trainer
DataAnnotation —California
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- Writing skills
- English
- Flexible schedule
Quick Apply
3d
Machine Learning Engineer - AI Trainer
DataAnnotation —California
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- Writing skills
- English
- Flexible schedule
Quick Apply
3d
REMOTE Senior AI/ML Engineer (CDT/EDT)
Everforth, Cybercoders —California
- $180,000 - $230,000 a year
- Full-time
- Remote
- Azure
- AWS
- Analysis skills
- Health insurance
- Dental insurance
Quick Apply
3d
Lead Data Scientist
Forward Financing —Ontario, CA
- $160,000 - $220,000 a year
- Full-time
- Master's degree
- SQL
- Math
- Paid parental leave
- Health insurance

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Marketing Data Scientist - AI Trainer

DataAnnotation -
Pomona, CA

Quick Apply

Job Details

Part-time | Full-time | Contract
$50 - $100 an hour

Benefits

Flexible schedule

Qualifications

Software coding
Design of experiments
English
Providing code feedback

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 Marketing Data 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 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 scientist jobs in ontario ca

Marketing Data Scientist - AI Trainer

Senior Data Scientist - AI Trainer

Data Scientist I

DATA SCIENTIST I–FINANCIAL & TIME SERIES FORECASTING

Data Scientist

Senior Data Analyst (AR)

Data Scientist for Analytics (Engineer/Scientist Support)

Senior Research Data Analyst

Senior Data Analyst

Data Analyst Sr, Finance - Encounter Data (Covered California)

Manufacturing Data Scientist

DATA SCIENTIST II

DATA SCIENTIST II–FINANCIAL & TIME SERIES FORECASTING

Machine Learning Research Scientist — Game Systems & Player Modeling (Chinese Mandarin Speaker)

Research Scientist — Mathematics & Statistics (Chinese Mandarin Speaker)

Machine Learning Engineer (Agent & Inference) - (Chinese Mandarin Speaker)

Principal Data Scientist - AI Trainer

Machine Learning Engineer - AI Trainer

REMOTE Senior AI/ML Engineer (CDT/EDT)

Lead Data Scientist

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