Frontend Software Engineer (Contract)

Alignerr United State
Remote
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AI Summary

Review and develop AI-generated frontend code, focusing on correctness, efficiency, and clarity. Write high-quality solutions for UI and web development challenges, explaining design decisions and problem-solving. Requires strong English communication, JavaScript expertise, and 3-5 years of frontend framework experience.

Key Highlights
Contract role with flexible, asynchronous, fully remote work.
Focus on reviewing and improving AI-generated frontend code.
Opportunity to work on data powering frontier AI.
Key Responsibilities
Review and evaluate AI-generated frontend code (JavaScript, HTML, CSS) for correctness, efficiency, accessibility, and clarity.
Write high-quality frontend solutions to UI and web development problems across varying difficulty levels.
Create clear, user-friendly explanations for design decisions, code logic, and problem-solving strategies.
Identify and flag edge cases or ambiguities in problem statements or AI responses.
Technical Skills Required
JavaScript HTML CSS async/await closures DOM manipulation ES6+ browser APIs
Benefits & Perks
Hourly pay
Fully remote
Asynchronous schedule
Flexible workload
Nice to Have
Experience with modern frontend frameworks, tools, or domains (e.g., React, Vue, Angular, web development)
Bachelor’s degree (or pursuing one) in Computer Science or a related field.
Master’s or PhD
Experience with data labeling, RLHF, or other AI training projects

Job Description


SWE - Frontend (Contract)

Labelbox

  • Remote (United States preferred) Shape the data that powers frontier AI

Quick facts

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

What You’ll Do

  • Review and evaluate AI-generated frontend code (JavaScript, HTML, CSS) for correctness, efficiency, accessibility, and clarity
  • Write high-quality frontend solutions to UI and web development problems across varying difficulty levels
  • Create clear, user-friendly explanations for design decisions, 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 frontend coding concepts
  • Expertise in JavaScript: Deep familiarity with core JavaScript features such as async/await, closures, DOM manipulation, ES6+ syntax, and browser APIs
  • 3–5 years of experience with modern frontend frameworks, tools, or domains (e.g., React, Vue, Angular, 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 & Fortune 500 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 frontend expertise, including frontend frameworks, state management, and performance optimization.

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, Andreessen Horowitz, B Capital, Gradient Ventures, Databricks Ventures, and Kleiner Perkins, and trusted by leading research labs and enterprises worldwide.

Ready to Apply?

Click “Apply” above, and take one or more domain specific assessments.

We review candidates on a rolling basis and will contact you if your background matches an active project.

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