Javascript - Senior Developers - AI Training - Phoenix, USA

Prolific is building a global platform for 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 cutting-edge AI models using real engineering expertise. Candidates complete a short skills assessment and, if successful, join as paid participants to train and evaluate AI models. Researchers typically pay up to $50 per hour, and some tasks require one hour of uninterrupted work.

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 such as Promises and async/await
• High standards for clean, modular, and readable ES6+ code
• Ability to identify subtle logical flaws, memory leaks, and security vulnerabilities such as XSS and prototype pollution

What you'll be doing in the role

• Review AI-generated JavaScript and TypeScript code for correctness and best practices
• Audit AI reasoning and explanations for 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

• JavaScript (ES6+) and TypeScript
• React, Node.js, Vue, Angular
• Jest, Cypress, Webpack, Vite
• RESTful APIs, GraphQL, server-side logic in Node environments

Why join as a Participant

• Competitive pay rates
• Flexible working hours
• Remote work opportunities
• Opportunity to contribute to the development of advanced AI systems

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