Marketing
AI
Infrastructure
+12
Engineering
Microsoft Teams
MCP
Make
Communication
Leadership
ARR
APIs
Alignment
Messaging
Sales
Strategic Thinking
Our mission is to bring clarity and control to the world's most complex codebases. AI is accelerating code creation, but the infrastructure to understand, oversee, and evolve that code hasn't kept pace.
AI
Healthcare
Writing
+10
Accuracy
Reasoning
Diagnosis
Planning
Pharmacology
Nursing
Medical Reasoning
Clinical Diagnosis
Treatment Planning
Patient Safety
Medical Experts (doctors, nurses, PAs, etc.) help train and evaluate how AI models reason about clinical and healthcare topics in a variety of ways.
Remote freelance role reviewing and labeling data on physical activity, exercise, and movement patterns (wearable sensor data, logs, video, or text) to support AI/health models. Annotate activity type, intensity, and movement quality. 8-week contractor engagement.
English
AI
Annotation
+12
Training
Reporting
Calibration
Operations
Management
Triage
Assurance
Quality Assurance
Slack
Channels
Webinars
Spreadsheets
Location: Remote Type of contract: Freelance Languages required: English Hourly Rate: Include the rate you are comfortable with on your CV. About ProlificProlific is not just another player in the AI space. We are building the biggest pool of quality human data in the world.
Remote freelance role labeling and evaluating data on food intake, dietary patterns, and nutrition information to support AI models for nutrition tracking, coaching, or research. Annotate food items, portions, and nutrient content. 8-week contractor engagement.
Remote freelance role reviewing and annotating text, audio, or survey data on mood, stress, and emotional states to support responsible AI in mental health. Apply validated frameworks and safety-escalation protocols. 8-week contractor engagement.
Remote freelance role annotating and evaluating sleep-health data (sleep-tracker data, logs, self-reports) to support AI models focused on sleep health. Annotate sleep stages, quality indicators, and disturbances. 8-week contractor engagement.
Remote freelance role evaluating LLM outputs on health coaching and behavior change. Assess AI-generated coaching conversations for accuracy, safety, empathy, and effectiveness against best-practice coaching frameworks. 8-week contractor engagement.
AI
English
Norwegian
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Norwegian. Native fluency in English and Norwegian is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Danish
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Danish. Native fluency in English and Danish is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Finnish
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Finnish. Native fluency in English and Finnish is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Swedish
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Swedish. Native fluency in English and Swedish is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Thai
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Thai. Native fluency in English and Thai is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Portuguese
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Portuguese (global, excluding Brazilian Portuguese). Native fluency in English and Portuguese (global, excluding Brazilian Portuguese) is required for this position.
AI
English
Indonesian
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Indonesian. Native fluency in English and Indonesian is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Vietnamese
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Vietnamese. Native fluency in English and Vietnamese is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
AI
English
Dutch
+12
Testing
Cybersecurity
Machine Learning
RLHF
DPO
Engineering
Analysis
Psychology
Acting
Writing
AI Safety
Language Skills
Fluent Language Skills Required: English & Dutch. Native fluency in English and Dutch is required for this position. Why This Role Exists At Mercor, we believe the safest AI is the one that’s already been attacked — by us.
We are hiring physics experts. This assessment is the first step to potentially qualify you for a range of paid opportunities at AfterQuery, from ongoing project work to specialized physics roles.
Remote DevOps and cloud engineering contractor role designing scalable, secure, cost-effective cloud architectures across AWS, Azure (preferred), and GCP with Terraform and Kubernetes. 8+ years of cloud experience.
Remote contractor role evaluating and improving agentic coding models: reviewing model trajectories, verifying solutions, designing realistic coding tasks, and producing high-quality annotations. 5+ years of software engineering.
CAD
Flexible
Modeling
+8
Design Review
SolidWorks
AutoCAD
CATIA
CAD Design
Professional Experience
Product Design
Attention to Detail
Remote, project-based role for experienced CAD professionals. Flexible hours, competitive pay, and a variety of modeling and design tasks. This is a remote, project-based role for CAD professionals with hands-on experience in 3D modeling and technical drafting.
AI
Infrastructure
Engineering
+12
Microsoft Teams
MCP
Make
Communication
Index
SaaS
Terraform
Google Cloud Platform
Leadership
Architecture
Debugging
Strategic Thinking
Our mission is to bring clarity and control to the world's most complex codebases. AI is accelerating code creation, but the infrastructure to understand, oversee, and evolve that code hasn't kept pace.
As a biology expert, you'll help train and evaluate how AI models reason about biological sciences. This can be writing challenging biology prompts, evaluating model responses for accuracy and sound reasoning, spotting subtle errors like fabricated citations, outdated…
Engineering
AI
Research
+12
Creativity
Organization
Physics
Simulation
Infrastructure
Leadership
Architecture
Algorithms
Decision Making
Microsoft Teams
Reporting
Testing
FirstPrinciples is building AI to accelerate scientific discovery. Our core product is the Theo Platform, a research environment built to help researchers iterate faster, validate rigorously, and reach verified results they can trust.
