Javascript - Senior Developers - AI Training - Liverpool, UK

prolificacademicltd; United States; Remote; USD 57,000 - 81,000; Full time

Job summary

Prolific Academic Ltd is seeking contributors with strong JavaScript and TypeScript expertise to help train and evaluate AI models. After a short skills assessment, you may be invited to complete paid review tasks, including sessions up to one hour.

Responsibilities include checking generated code for correctness, evaluating explanations of algorithms, running code in Node.js or browser, and flagging inefficiencies, insecure patterns, and memory leaks.

Qualifications

• Bachelor's, Master's or Doctoral degree in CS or related field.
• Professional experience building scalable web applications with JavaScript or TypeScript.
• Ability to solve medium to hard algorithmic coding problems independently in JavaScript.
• Strong knowledge of the event loop, closures, prototypal inheritance, Promises, and async/await.
• Consistent use of modular, readable code and modern ES6+ practices.
• Ability to recognize vulnerabilities such as cross-site scripting and prototype pollution.

Responsibilities

• Check AI-generated JavaScript and TypeScript for correctness, clarity, and sound engineering practices.
• Assess whether explanations of algorithmic solutions are logically valid.
• Run generated code in Node.js or browser environments and examine its behavior and performance.
• Identify inefficient approaches, outdated syntax, invented library APIs, logical defects, memory leaks, and security issues.
• Provide structured feedback on model reasoning about frontend and backend design.

Skills

JavaScript

TypeScript

Node.js

Closures and event loop

Promises and async/await

ES6+ practices

Education

Bachelor's degree in CS or related field

Master's or PhD preferred

Tools

Jest

Cypress

Webpack

Vite

REST APIs

GraphQL

Job description

Role overview

Contribute professional JavaScript and TypeScript expertise to the training and evaluation of AI models. After a short skills assessment, successful candidates may be invited to complete paid review and feedback tasks, which can include focused sessions of up to an hour.

Responsibilities

• Check AI-generated JavaScript and TypeScript for correctness, clarity, and sound engineering practices.
• Assess whether explanations of algorithmic solutions are logically valid.
• Run generated code in Node.js or browser environments and examine its behavior and performance.
• Identify inefficient approaches, outdated syntax, invented library APIs, logical defects, memory leaks, and security issues.
• Provide structured feedback on model reasoning about frontend and backend design.

Requirements

• A bachelor’s, master’s, or doctoral degree in computer science, software engineering, or a closely related technical field.
• Professional experience building scalable web applications with JavaScript or TypeScript.
• Ability to solve medium to hard algorithmic coding problems independently in JavaScript.
• Strong knowledge of the event loop, closures, prototypal inheritance, Promises, and async/await.
• Consistent use of modular, readable code and modern ES6+ practices.
• Ability to recognize vulnerabilities such as cross-site scripting and prototype pollution.

Nice to have

• Experience with React, Node.js, Vue, or Angular; testing and build tools such as Jest, Cypress, Webpack, or Vite; and REST APIs, GraphQL, or server-side Node.js.

Benefits and work setup

Tasks are paid, with rates reported as potentially reaching $50 per hour; actual availability and pay may vary by task. Work is described as flexible and remote, and candidates should be able to set aside uninterrupted time for some assignments. A 10–15 minute assessment is part of the selection process.