Top 228 Research scientist Jobs in Costa Mesa, Ca

Cognitive Scientist - AI Trainer
DataAnnotation —Garden Grove, CA
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
R&D Supervisor
Quick USA —Irvine, CA
- $80,000 - $100,000 a year
- Full-time
- Microsoft Outlook
- Ability to walk for extended periods
- 5 years
- Health insurance
- Dental insurance
Quick Apply
1d
Research Scientist - AI Trainer
DataAnnotation —California
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Clinical Data Scientist - AI Trainer
DataAnnotation —California
- $70.78 - $141.56 an hour
- Part-time
- Remote
- Computer Science
- Writing skills
- English
- Flexible schedule
Quick Apply
Research & Development Scientist
Biowy —Lake Forest, CA
- Master's degree
- Analysis skills
- Doctor of Philosophy
Research Scientist I
ResearchDx —Irvine, CA
- Full-time
- Management
- Analysis skills
- Doctor of Philosophy
Scientist I
Advanced Sterilization Products —Irvine, CA
- $65,090 - $108,675 a year
- Bachelor's degree
- Communication skills
- Entry level
R&D Scientist, Immunoassay Development
Fluxergy —Irvine, CA
- $80,000 - $100,000 a year
- Full-time
- 3 years
- Doctor of Philosophy
- Senior level
- Paid holidays
- Health insurance
Quick Apply
Scientist II
Advanced Sterilization Products —Irvine, CA
- $81,190 - $135,585 a year
- Mid-level
- Travel
- Communication skills
Clinical Lab Scientist- Corelab Irvine- FT Variable Shift
University of California, Irvine —Irvine, CA
- $59.43 - $86.55 an hour
- Overtime
- Background check
- Customer service
- English
- Health insurance
- Retirement plan
Clinical Laboratory Scientist Specialist-Fulltime-Laboratory-Lakewood-Variable
University of California, Irvine —Lakewood, CA
- $65.48 - $95.36 an hour
- Full-time
- Background check
- Customer service
- Bachelor of Science
- Health insurance
- Retirement plan
7d
Student Researcher, BS/MS, Fall 2026
Google —Irvine, CA
- $98,000 - $131,000 a year
- Computer Science
- Bachelor of Science
- English
- Paid holidays
- Health insurance
11d
Per Diem-Clinical Laboratory Scientist-Laboratory-Lakewood-Variable
University of California, Irvine —Lakewood, CA
- $71.40 an hour
- Per diem
- Background check
- Management
- Customer service
- Health insurance
- Retirement plan
11d
Innovation Scientist
MeriCal, LLC —Orange, CA
- $115,000 - $130,000 a year
- Full-time
- 5 years
- Bachelor of Science
- Databases
- Wellness program
- Paid holidays
Quick Apply
Research Assistant (Long Beach)
Irvine Clinical Research —Long Beach, CA
- $25 an hour
- Full-time
- English
- Clinic
- Neurology
- Dental insurance
- Paid time off
Quick Apply
ENVIRONMENTAL SCIENTIST
Department of Fish and Wildlife —Orange County, CA
- $4,418 - $9,321 a month
- Full-time
- Hybrid work
- Mid-level
- Office
- Driver's License
- Dental insurance
- Vision insurance
9d
Clinical Trial Manager
University of California, Irvine —Irvine, CA
- $113,505 - $215,145 a year
- Full-time
- Background check
- Analysis skills
- University
- Health insurance
- Retirement plan
R&D Food Scientist
Nura —Irvine, CA
- $80,000 - $100,000 a year
- Full-time
- Mid-level
- 3 years
- Master's degree
Quick Apply
Market Research Associate
Green Street Advisors, LLC —Newport Beach, CA
- $80,000 - $110,000 a year
- Full-time
- Writing skills
- Mid-level
- Finance
1d
Clinical Research Coordinator I, Oncology
CHOC Children's —Orange, CA
- $29.48 - $48.61 an hour
- Full-time
- Microsoft Excel
- Writing skills
- Children

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Cognitive Scientist - AI Trainer

DataAnnotation -
Garden Grove, 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 Cognitive 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

research scientist jobs in costa mesa, ca

Cognitive Scientist - AI Trainer

R&D Supervisor

Research Scientist - AI Trainer

Clinical Data Scientist - AI Trainer

Research & Development Scientist

Research Scientist I

Scientist I

R&D Scientist, Immunoassay Development

Scientist II

Clinical Lab Scientist- Corelab Irvine- FT Variable Shift

Clinical Laboratory Scientist Specialist-Fulltime-Laboratory-Lakewood-Variable

Student Researcher, BS/MS, Fall 2026

Per Diem-Clinical Laboratory Scientist-Laboratory-Lakewood-Variable

Innovation Scientist

Research Assistant (Long Beach)

ENVIRONMENTAL SCIENTIST

Clinical Trial Manager

R&D Food Scientist

Market Research Associate

Clinical Research Coordinator I, Oncology

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