Javascript - Senior Developers - AI Training - Boston, USA

Prolific is building a global pool of high-quality human data used by AI developers, researchers, and organizations.

The role

We're looking for JavaScript Experts to join the Expert Network to help train and evaluate AI models using real engineering expertise. Candidates complete a short skills assessment and, if successful, join as paid participants working on AI training and evaluation tasks.

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

What you'll bring

• BS, MS, or PhD in Computer Science, Software Engineering, or a closely related technical field
• Professional experience building scalable web applications using JavaScript/TypeScript
• Ability to solve LeetCode Medium to Hard-level problems in JavaScript independently
• Expert understanding of the Event Loop, closures, prototypical inheritance, and asynchronous patterns including Promises and async/await
• High standard for clean code, including modularity, readability, and adherence to modern ES6+ standards
• Ability to identify subtle logical flaws, memory leaks, or security vulnerabilities such as XSS and prototype pollution in generated code

What you'll be doing in the role

• Review AI-generated JavaScript and TypeScript code for correctness and best practices
• Audit AI-generated explanations for complex algorithmic solutions
• Execute generated scripts in Node.js or browser environments to verify output and performance
• Identify inefficient solutions, deprecated syntax, and hallucinated library methods
• Provide structured feedback on frontend and backend architecture reasoning

Key Technologies

• Expert mastery of JavaScript (ES6+) and TypeScript
• Experience with React, Node.js, Vue, or Angular
• Proficiency with Jest, Cypress, Webpack, and Vite
• Strong understanding of RESTful APIs, GraphQL, and server-side logic in a Node environment

Why join as a Participant

Joining the Expert Network provides the opportunity to help shape future AI models using professional expertise. Participants can access competitive pay rates, flexible hours, and remote work opportunities after passing the assessment.

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