Top 145 Data scientist Jobs in Ontario Ca

Decision Scientist - AI Trainer
DataAnnotation —Riverside, CA
- $40 - $60 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Computational Neuroscientist - AI Trainer
DataAnnotation —Fontana, CA
- $40 - $60 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Quantitative Reasoning Analyst - AI Trainer
DataAnnotation —Rancho Cucamonga, CA
- $40 - $60 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
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
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
9d
Data Scientist
ocV!BE —Anaheim, CA
- $100,000 - $140,000 a year
- Full-time
- Computer Science
- Mid-level
- 3 years
Data Scientist
Gustaine —Orange, CA
- Computer Science
- Java
- Math
DATA SCIENTIST II
VSolvit —Norco, CA
- $115,000 - $130,000 a year
- Full-time
- Azure
- Computer Science
- DevOps
- Health savings account
- Disability insurance
Quick Apply
Staff Data Scientist – ML, Gen AI & Agentic AI
Niagara Bottling —Diamond Bar, CA
- $136,778.46 - $198,328.77 a year
- Full-time
- Computer Science
- Master's degree
- SQL
- Health savings account
- AD&D insurance
Quick Apply
Senior Data Analyst
Forward Financing —Ontario, CA
- $114,000 - $144,000 a year
- Full-time
- Computer Science
- Salesforce
- SQL
- Paid parental leave
- Health insurance
7d
Research Scientist — Mathematics & Statistics (Chinese Mandarin Speaker)
Bitus Labs —Irvine, CA
- From $100,000 a year
- Full-time
- Master's degree
- Math
- Continuous improvement
- Health insurance
- Dental insurance
Quick Apply
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 - AI Trainer
DataAnnotation —California
- $40 - $60 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Professional Consultant - Remote
Genesis10 —Irvine, CA
- $40 - $42 an hour
- Contract
- Remote
- 6 years
- Computer Science
- Continuous improvement
- Commuter assistance
- Health savings account
Quick Apply
2d
Sr. AI Engineer & Strategist
Everforth —Irvine, CA
- Full-time
- Remote
- System design
- Fair chance
- Senior level
Quick Apply
4d
Senior Research Data Analyst
University of California, Riverside —Riverside, CA
- $84,100 - $154,700 a year
- Full-time
- ERP systems
- Mid-level
- SQL
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
11d
Director-Data Science Center
Loma Linda University Health —Loma Linda, CA
- $124,321.60 - $189,176.00 a year
- Full-time
- Azure
- Management
- 5 years
Manager, Data Science
Inland Empire Health Plan —Rancho Cucamonga, CA
- $154,128.00 - $204,214.40 a year
- Full-time
- Hybrid work
- 7 years
- Computer Science
- Research
- Disability insurance
- Health insurance
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

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data scientist jobs near ontario ca

Decision Scientist - AI Trainer

DataAnnotation -
Riverside, CA

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Job Details

Part-time | Full-time | Contract
$40 - $60 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 Decision 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:

2+ 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 is preferred (Statistics, Computer Science, Mathematics, Engineering, or similar); a 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

Decision Scientist - AI Trainer

Computational Neuroscientist - AI Trainer

Quantitative Reasoning Analyst - AI Trainer

Data Scientist for Analytics (Engineer/Scientist Support)

Lead Data Scientist

Data Scientist

Data Scientist

DATA SCIENTIST II

Staff Data Scientist – ML, Gen AI & Agentic AI

Senior Data Analyst

Research Scientist — Mathematics & Statistics (Chinese Mandarin Speaker)

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

Research Scientist - AI Trainer

Professional Consultant - Remote

Sr. AI Engineer & Strategist

Senior Research Data Analyst

Data Analyst Sr, Finance - Encounter Data - Covered California

Director-Data Science Center

Manager, Data Science

Senior Data Analyst

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