Javascript - Senior Developers - AI Training - Sacramento, US

Prolific is building a global platform that supports AI developers, researchers, and organizations with high-quality human data.

The role

We're looking for JavaScript Experts to join an Expert Network to help train and evaluate cutting-edge AI models using real engineering expertise. Candidates complete a short assessment to evaluate technical skills and suitability for AI tasks. Successful candidates can join as participants and complete paid tasks related to AI model evaluation and training.

Researchers looking for these skills tend to pay up to $50 per hour. Tasks may require one hour of uninterrupted work, though some 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 standards for clean code, modularity, readability, and adherence to ES6+ standards
• 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 functional correctness and best practices
• Audit AI explanations for algorithmic solutions and validate logical reasoning
• Execute model-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, and server-side Node environments

Why join the platform

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

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