Software Engineer - Frontend

Role: Software Engineer — Frontend (Contract)

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

What you’ll do

• Review and evaluate AI-generated frontend code (JavaScript, HTML, CSS) for:
  • correctness
  • efficiency
  • accessibility
  • clarity
• Write high-quality frontend solutions for UI/web development problems across varying difficulty levels.
• Explain your decisions clearly, including:
  • design decisions
  • code logic
  • problem-solving approaches
• Identify and flag edge cases or ambiguities in problem statements or AI responses.

Requirements

• Fluent English with strong written communication skills
• Ability to clearly explain frontend coding concepts
• JavaScript expertise, including:
  • async/await
  • closures
  • DOM manipulation
  • ES6+ syntax
  • browser APIs
• 3–5 years experience with modern frontend frameworks/tools/domains (e.g., React, Vue, Angular, or web development)
• Bachelor’s degree (or pursuing) in Computer Science or related field

Nice to have

• Master’s or PhD (preferred)
• Experience with data labeling, RLHF, or other AI training projects

Interview process

• English screening with Zara (AI interviewer)
• Domain-specific interview/assessment focused on:
  • frontend frameworks
  • state management
  • performance optimization

About the company (Labelbox)

Labelbox builds the data engine for breakthrough AI, enabling teams to iterate on data with expert services and a marketplace so models can be safer and smarter in production.