Top 4055 Data science Jobs in California

Principal Data Scientist - AI Trainer
DataAnnotation —Windsor, CA
- $50.00 - $140.56 an hour
- Part-time
- Remote
- Computer Science
- English
- 3 years
- Flexible schedule
Quick Apply
10d
Special Agent: Cybersecurity/Technology Expertise
Federal Bureau of Investigation —San Francisco, CA
- $103,326 - $133,200 a year
- Full-time
- Computer Science
- Mid-level
- Bachelor's degree
Special Agent: Cybersecurity/Technology Expertise
Federal Bureau of Investigation —Los Angeles, CA
- $103,326 - $133,200 a year
- Full-time
- Computer Science
- Mid-level
- Bachelor's degree
Data Science Consultant - AI Trainer
DataAnnotation —San Ramon, CA
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
10d
Special Agent: Cybersecurity/Technology Expertise
Federal Bureau of Investigation —San Diego, CA
- $103,326 - $133,200 a year
- Full-time
- Computer Science
- Mid-level
- Bachelor's degree
FBI Special Agent: Data Science & Intelligence Expertise
Federal Bureau of Investigation —San Francisco, CA
- $99,461 - $128,329 a year
- Full-time
- Doctoral degree
- Master's degree
- Bachelor's degree
FBI Special Agent: Data Science & Intelligence Expertise
Federal Bureau of Investigation —Los Angeles, CA
- $99,461 - $128,329 a year
- Full-time
- Doctoral degree
- Master's degree
- Bachelor's degree
FBI Special Agent: Data Science & Intelligence Expertise
Federal Bureau of Investigation —Sacramento, CA
- $99,461 - $128,329 a year
- Full-time
- Doctoral degree
- Master's degree
- Bachelor's degree
Data Engineer AI
Quest Global —Sunnyvale, CA
- $105,000 - $110,000 a year
- Full-time
- Mid-level
- Office
- SQL
- Disability insurance
- Health insurance
Quick Apply
Data Scientist - Machine Learning
Tailored Shared Services, LLC —Dublin, CA
- $80,700 - $110,000 a year
- Full-time
- 3 years
- Master's degree
- SQL
- Store discount
- Paid jury duty
Quick Apply
AI/ML Applied Scientist - Remote
UnitedHealth Group —San Francisco, CA
- $112,300 - $134,800 a year
- Full-time
- Hybrid work
- Computer Science
- Pass drug screening
- Office
7d
Data Scientist, Analytics
Discord —San Francisco Bay Area, CA
- $180,000 - $220,000 a year
- Full-time
- Mid-level
- SQL
- Analysis skills
6d
Data Scientist
Pinterest —San Francisco, CA
- $101,382 - $209,296 a year
- Remote
- Computer science
- Computer Science
- Bachelor's degree
Data Scientist
Block, Inc. —San Francisco Bay Area, CA
- $178,200 - $297,000 a year
- Remote
- Salesforce
- 3 years
- Master's degree
- Life insurance
- Retirement plan
3d
Data Scientist
Mastercard —San Francisco, CA
- $138,000 - $221,000 a year
- Online Application
- Computer Science
- Master's degree
- SQL
- Paid jury duty
- Health savings account
Data Scientist
Parafin —San Francisco, CA
- $200,000 - $330,000 a year
- Full-time
- Hybrid work
- Computer science
- Computer Science
- Mid-level
- Commuter assistance
- Paid parental leave
Data Scientist
Twitch —San Francisco, CA
- $136,000 - $212,800 a year
- Computer science
- Computer Science
- Mid-level
- AD&D insurance
- Disability insurance
14d
Data Scientist
University of California San Francisco —San Francisco, CA
- Full-time
- Azure
- Computer Science
- Mid-level
Data Science Engineering
California Institute of Technology —Pasadena, CA
- $40.50 - $64.00 an hour
- Computer science
- Computer Science
- Mid-level
- Paid holidays
- Health insurance
Data Scientist II - AMZ27351.1
Amazon Web Services, Inc. - A97 —San Francisco, CA
- $157,300 - $212,800 a year
- Multiple hires
- Computer Science
- Mid-level
- Office
- AD&D insurance
- Health insurance

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data science jobs near california

Principal Data Scientist - AI Trainer

DataAnnotation -
Windsor, CA

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Job Details

Part-time | Full-time | Contract
$50.00 - $140.56 an hour
10 days ago

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 Principal 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

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data science jobs in california

Principal Data Scientist - AI Trainer

Special Agent: Cybersecurity/Technology Expertise

Special Agent: Cybersecurity/Technology Expertise

Data Science Consultant - AI Trainer

Special Agent: Cybersecurity/Technology Expertise

FBI Special Agent: Data Science & Intelligence Expertise

FBI Special Agent: Data Science & Intelligence Expertise

FBI Special Agent: Data Science & Intelligence Expertise

Data Engineer AI

Data Scientist - Machine Learning

AI/ML Applied Scientist - Remote

Data Scientist, Analytics

Data Scientist

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Data Scientist

Data Scientist

Data Scientist

Data Scientist

Data Science Engineering

Data Scientist II - AMZ27351.1

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