Top 12 Senior data scientist Jobs in O'fallon, Mo

Senior Data Scientist - AI Trainer
DataAnnotation —Missouri
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- 3 years
- Flexible schedule
Quick Apply
Senior Quantitative Analyst - AI Trainer
DataAnnotation —Missouri
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- Mid-level
- Flexible schedule
Quick Apply
Senior Data Analyst - Archimedes
Navitus Health Solutions, LLC —Earth City, MO
- Full-time
- Remote
- Office
- SQL
- Bachelor's degree
Senior AI Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Azure
- Computer Science
- SQL
- Paid jury duty
- Health savings account
6d
Senior Data Analyst Engineer
TKC Holdings —St. Louis, MO
- $100,000 - $160,000 a year
- Full-time
- Computer Science
- Customer service
- 3 years
- AD&D insurance
- Disability insurance
21h
Senior Material Master Data Analyst
MiTek USA Inc —Chesterfield, MO
- Full-time
- 5 years
- Office
- Continuous improvement
- Profit sharing
- Paid parental leave
Quick Apply
Senior Exploitation Specialist / Data Scientist
B&A —St. Louis, MO
- Full-time
- Office
- Analysis skills
- Bachelor's degree
- Commuter assistance
- Health savings account
Quick Apply
12d
Senior Data Solution Architect/Engineer
Land O'Lakes —Gray Summit, MO
- $78,083 - $103,346 a year
- Full-time
- Hybrid work
- Computer Science
- Research
- Office
Senior AI/ML Developer (Full-Stack)
Peraton —Pacific, MO
- $86,000 - $138,000 a year
- Azure
- Computer Science
- 5 years
- Health savings account
- Paid holidays

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Senior Data Scientist - AI Trainer
DataAnnotation —Missouri
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Senior Data Scientist - AI Trainer

DataAnnotation -
Missouri

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 Senior 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

senior data scientist jobs in o'fallon, mo

Senior Data Scientist - AI Trainer

Senior Quantitative Analyst - AI Trainer

Senior Data Analyst - Archimedes

Senior AI Engineer

Senior Data Analyst Engineer

Senior Material Master Data Analyst

Senior Exploitation Specialist / Data Scientist

Senior Data Solution Architect/Engineer

Senior AI/ML Developer (Full-Stack)

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