Senior JavaScript Engineer - AI Model Trainer

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

Job summary

Prolific in the United States is seeking a JavaScript Specialist for AI Training. You will join our Expert Network to evaluate and train AI models, reviewing JavaScript/TypeScript code and ensuring quality, performance, and security.

Successful candidates complete a short test, then may be invited to work from home with flexible hours and competitive pay, up to $50 per hour. Strong knowledge of ES6+ and modern frameworks is essential.

Qualifications

• BS, MS, or PhD in CS/SE or related field.
• Experience building scalable web apps with JavaScript/TypeScript.
• Ability to solve LeetCode Medium to Hard problems in JavaScript.
• Expert understanding of Event Loop, closures, prototype inheritance, and async patterns.
• High standard for clean code, modularity and ES6+.
• Ability to spot memory leaks and security flaws (XSS, prototype pollution).

Responsibilities

• Evaluate AI-generated JavaScript/TypeScript code for functional correctness.
• Validate logic and reasoning in algorithm explanations.
• Conduct execution testing in Node.js or browser environments.
• Annotate model performance and identify inefficient or outdated code.
• Provide structured feedback on frontend/backend architectural discussions.

Skills

JavaScript/TypeScript

Event Loop & async patterns

Prototypical inheritance

Code quality & modularity

Security awareness (XSS)

Education

BS/MS/PhD in CS/SE

Tools

Jest

Cypress

Webpack

Vite

Job description

Prolific in the United States is seeking a JavaScript Specialist for AI Training. You will join our Expert Network to evaluate and train AI models, reviewing JavaScript/TypeScript code and ensuring quality, performance, and security.

Successful candidates complete a short test, then may be invited to work from home with flexible hours and competitive pay, up to $50 per hour. Strong knowledge of ES6+ and modern frameworks is essential.