Jobs at Prolific (Now Hiring) — 3,402 open — Page 114

Javascript - Senior Developers - AI Training - Cambridge, UK

Remote OK

Senior$34M raised

JavaScript Specialist- AI Training About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and org…

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Javascript - Senior Developers - AI Training - Brighton, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Javascript - Senior Developers - AI Training - Bristol, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Mental Health Professionals - AI Training - Jacksonville, USA

Remote Solely

$8/hr–$65/hr

Mid level$34M raised

Mental Health Professionals - AI Training About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, …

Skills: Psychological Theory, Research Methods, Human Behaviour Analysis, Content Editing, Technical Writing

Prolific

Legal Professionals - AI Training - London, UK

Remote Solely

Mid level$34M raised

Legal Professionals - AI Training About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and orga…

Skills: Document Evaluation, AI Model Training, Fact-Checking, Legal Reasoning, Critical Thinking

Prolific

Javascript - Senior Developers - AI Training - Manchester, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Javascript - Senior Developers - AI Training - London, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Javascript - Senior Developers - AI Training - Edinburgh, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

Javascript - Senior Developers - AI Training - Birmingham, UK

Remote OK

Senior$34M raised

Skills: JavaScript, TypeScript, React, Node.js, Vue

Prolific

AI Training Experts - Madrid

Remote Solely

Mid level$34M raised

AI Training Experts About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizations use …

Skills: AI Training, Data Annotation, AI Evaluation, Analytical Writing, Attention To Detail

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

AI Trainer – Visual & Graphic Design Expert (Remote) About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, re…

Skills: Graphic Design, Visual Design, Figma, Adobe Photoshop, Adobe Illustrator

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

Skills: Graphic Design, Visual Design, Figma, Adobe Photoshop, Adobe Illustrator

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

Skills: Graphic Design, Visual Design, Figma, Adobe Photoshop, Adobe Illustrator

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

Skills: Graphic Design, Visual Design, Figma, Adobe Photoshop, Adobe Illustrator

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

Skills: Graphic Design, Visual Design, Figma, Adobe Photoshop, Adobe Illustrator

Prolific

AI Trainer – GNU Image Manipulation Program Users (Remote)

Remote Solely

Mid level$34M raised

AI Trainer – GNU Image Manipulation Program Users (Remote) About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI develope…

Skills: GIMP, Graphic Design, Visual Design, Typography, Image Editing

Prolific

United Kingdom Residents - Survey Participants - UK

Remote Solely

Entry level$34M raised

Survey Participants - UK About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizations…

Skills: AI Training, Data Evaluation, User Research, Behavioral Analysis, Attention To Detail

Prolific

France Residents - Survey Participants - France

Remote Solely

Entry level$34M raised

Survey Participants - France About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizat…

Skills: AI Training, Data Evaluation, User Research, Behavioral Analysis, Attention To Detail

Prolific

New Zealand Residents - Survey Participants - New Zealand

Remote Solely

Entry level$34M raised

Survey Participants - New Zealand About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and orga…

Skills: AI Training, User Research, Data Collection, Attention To Detail, Critical Thinking

Prolific

Poland Residents - Survey Participants - Poland

Remote Solely

Entry level$34M raised

Survey Participants - Poland About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizat…

Skills: AI Training, User Research, Data Collection, Attention To Detail, Critical Thinking

JavaScript Specialist- AI Training

About Prolific

Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world.

Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills.

The role

We’re looking for JavaScript Experts to join our Expert Network to help train and evaluate cutting-edge AI models using real engineering expertise. If you have the necessary experience, we’ll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you’ll be invited to join Prolific as a participant, where you’ll get paid to train and evaluate powerful AI models.

Researchers looking for your skills tend to pay up to $50 per hour. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter.

What you’ll bring

Education: a BS, MS, or PhD in Computer Science, Software Engineering, or a closely related technical field.
Professional Experience: professional experience building scalable web applications using JavaScript/TypeScript.
Coding Proficiency: ability to solve LeetCode Medium to Hard-level problems in JavaScript independently.
Deep Domain Knowledge: expert understanding of the Event Loop, closures, prototypical inheritance, and asynchronous patterns (Promises, async/await).
Code Quality: a high standard for clean code, including modularity, readability, and adherence to modern ES6+ standards.
Attention to Detail: ability to spot subtle logical flaws, memory leaks, or security vulnerabilities (e.g., XSS, prototype pollution) in model-generated code.

What you'll be doing in the role

Evaluate Code Accuracy: review AI-generated JavaScript and TypeScript code for functional correctness and adherence to best practices.
Validate Logic & Reasoning: audit the step-by-step explanations provided by AI for complex algorithmic solutions to ensure they are logically sound.
Conduct Execution Testing: execute model-generated scripts in appropriate environments (Node.js or Browser consoles) to verify performance and output.
Annotate Model Performance: identify areas where a model provides inefficient solutions, deprecated syntax, or hallucinated library methods.
Refine Technical Logic: provide structured feedback on how models reason through frontend or backend architecture discussions.

Key Technologies

Core Language: expert mastery of JavaScript (ES6+) and TypeScript.
Frameworks: extensive experience with React, Node.js, Vue, or Angular.
Testing & Tools: proficiency with Jest, Cypress, Webpack, and Vite.
Backend & API: strong understanding of RESTful APIs, GraphQL, and server-side logic in a Node environment.

Why Prolific is a great platform to join as a Participant

Joining our Expert Network will give you the chance to influence the AI models of the future using professional expertise. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home.

We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems.

We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation – one that reflects the breadth and the best of humanity.

Links & Privacy

Website

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Privacy Statement

By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific's use of your personal information.

About Prolific

LinkedIn Visit site

Building the biggest pool of quality human data in the world—for AI developers, researchers, and organizations.

Industry: Software Development
Company size: 51-200 employees
Founded: 2014
Headquarters: London
LinkedIn followers: 92,765
Total funding: $34M

Prolific is a technology company building the biggest pool of quality human data in the world—and the ultimate platform to access it. Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from real, engaged participants—with a new study launched every 2 minutes. Prolific has been ranked among the fastest-growing businesses in the Financial Times 1000 in 2025 & 2024 and the Deloitte Technology Fast 50 in 2023.

Offices: London, GB · New York City, US · San Francisco, US

crowdsourcingparticipant recruitmentonline researchaidata collectiondata labelingai traininghuman dataglobal participant poolai model development

View all jobs at Prolific

Jobs at Prolific (Now Hiring) — 3,402 open — Page 114

Javascript - Senior Developers - AI Training - Cambridge, UK

Javascript - Senior Developers - AI Training - Brighton, UK

Javascript - Senior Developers - AI Training - Bristol, UK

Mental Health Professionals - AI Training - Jacksonville, USA

Legal Professionals - AI Training - London, UK

Javascript - Senior Developers - AI Training - Manchester, UK

Javascript - Senior Developers - AI Training - London, UK

Javascript - Senior Developers - AI Training - Edinburgh, UK

Javascript - Senior Developers - AI Training - Birmingham, UK

AI Training Experts - Madrid

AI Trainer – GNU Image Manipulation Program Users (Remote)

AI Trainer – GNU Image Manipulation Program Users (Remote)

AI Trainer – GNU Image Manipulation Program Users (Remote)

AI Trainer – GNU Image Manipulation Program Users (Remote)

AI Trainer – GNU Image Manipulation Program Users (Remote)

AI Trainer – GNU Image Manipulation Program Users (Remote)

United Kingdom Residents - Survey Participants - UK

France Residents - Survey Participants - France

New Zealand Residents - Survey Participants - New Zealand

Poland Residents - Survey Participants - Poland

Javascript - Senior Developers - AI Training - Cambridge, UK

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JavaScript Specialist- AI Training

About Prolific

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