Senior JS Engineer — AI Training Expert (Remote)

Prolific; United States; Remote; USD 41,000 - 69,000; Full time

Job summary

Prolific seeks JavaScript Specialists to join our Expert Network to help train and evaluate AI models using real engineering expertise. If successful, you’ll join Prolific as a participant and get paid to train and evaluate powerful AI models.

Researchers may pay up to $50 per hour for tasks requiring about an hour of uninterrupted work, with many shorter. You’ll bring a BS/MS/PhD in CS or related field, professional JS/TS experience, and a disciplined approach to clean, modern code while

Qualifications

• BS, MS, or PhD in Computer Science, Software Engineering, or related field.
• Professional experience building scalable web apps using JavaScript/TypeScript.
• Ability to solve LeetCode Medium–Hard problems in JavaScript.
• Deep understanding of the Event Loop, closures, prototypal inheritance, and asynchronous patterns.
• High standard for clean, modular, readable ES6+ code.
• Ability to spot memory leaks and security issues (XSS, prototype pollution) in model code.

Responsibilities

• Evaluate code accuracy of AI-generated JS/TS for correctness and best practices.
• Validate logic and reasoning of AI explanations for complex algorithms.
• Conduct execution testing in Node.js or browser consoles to verify performance.
• Annotate model performance and flag inefficient or deprecated methods.
• Refine technical logic with structured feedback on frontend/backend design.

Skills

JS/TS experience

Event Loop knowledge

Prototypical inheritance

Async patterns

Code quality

Security awareness

Education

CS degree

Tools

Jest

Cypress

Webpack

Vite

Job description

Prolific seeks JavaScript Specialists to join our Expert Network to help train and evaluate AI models using real engineering expertise. If successful, you’ll join Prolific as a participant and get paid to train and evaluate powerful AI models.

Researchers may pay up to $50 per hour for tasks requiring about an hour of uninterrupted work, with many shorter. You’ll bring a BS/MS/PhD in CS or related field, professional JS/TS experience, and a disciplined approach to clean, modern code while