Coding Expert - JavaScript

Alignerr Corp.; United States; Remote; USD 34,000 - 138,000; Part time

Benefits offered by this job

Fully remote

Asynchronous schedule

Rolling start

Job summary

Labelbox is seeking a Coding Expert - JavaScript (Contract) to review and craft high-quality JavaScript solutions for AI-focused coding challenges. Work remotely with flexible asynchronous hours, contributing to projects used by top AI teams.

The role emphasizes deep JavaScript knowledge (async/await, closures, DOM, ES6+), 3–5 years in JS frameworks, and potential involvement in data labeling and AI training work. Rolling start dates and hourly compensation apply.

Qualifications

• Strong proficiency in JavaScript and modern language features.
• Experience with async programming and DOM APIs.
• Familiarity with front-end and back-end JS tooling.
• Bachelor’s degree in CS or related field preferred.

Responsibilities

• Review and evaluate AI-generated JavaScript code for correctness and efficiency.
• Write high-quality JS solutions to coding problems across levels of difficulty.
• Create clear explanations for code logic and problem-solving approaches.
• Identify edge cases or ambiguities in problem statements or AI responses.

Skills

JavaScript fundamentals

Async/await

Closures

DOM manipulation

ES6+ features

Education

Bachelor's degree in Computer Science

Tools

Node.js

React

Web development

Job description

Remote (UnitedStates preferred) Shape the data that powers frontier AI

Coding Expert - JavaScript (Contract)

Labelbox

Quick facts

• Engagement - Hourly, at-will contractor
• Schedule - Fully remote & asynchronous (min.15hrs/week)
• Pay Range (US) - $25–$100 per hour
• Start Date - Rolling - staffed as projects launch

What you’ll do

• Review and evaluate AI-generated JavaScript code for correctness, efficiency, and clarity.
• Write high-quality JavaScript solutions to coding problems across varying difficulty levels.
• Create clear, human-readable explanations for code logic and problem-solving strategies.
• Identify and flag edge cases or ambiguities in problem statements or AI responses.

You’re a great fit if

• Fluent in English, with strong written communication skills and the ability to clearly explain abstract coding concepts.
• Expertise in JavaScript: Deep familiarity with core JavaScript concepts such as async/await, closures, DOM manipulation, and ES6+ features.
• 3-5 years of experience with JavaScript frameworks, tools, or domains (e.g., Node.js, React, web development) is a plus.
• Bachelor’s degree (or pursuing one) in Computer Science or a related field. Master’s or PhD preferred, but not required.
• Bonus: Experience with data labeling, RLHF, or other AI training projects.

About the role

• Flexible workload - work from anywhere, on your own schedule
• High impact - your craft directly improves models used by top AI labs & Fortune500 teams
• Clear ownership - know exactly what success looks like and have autonomy to deliver
• Growth potential - consistent high performers spearhead new programs and mentor incoming SMEs

Interview process

• Complete a screening with Zara - our AI interviewer in English, to learn more about your background and experience.
• Domain-specific Zara interview to assess your JavaScript expertise, including advanced language features (such as closures, prototypes, and async/await), modern frameworks (like React, Angular, and Node.js), and your problem-solving skills with complex algorithms and data structures.

About Labelbox

Labelbox builds the data engine that accelerates breakthrough AI. Our platform, expert services, and marketplace let teams iterate on data as nimbly as they iterate on code, enabling safer, smarter models in production. We’re backed by SoftBank, AndreessenHorowitz, BCapital, GradientVentures, DatabricksVentures, and KleinerPerkins, and trusted by leading research labs and enterprises worldwide.