Frontend JavaScript Engineer

Role overview

As a Frontend JavaScript Engineer (AI Training), you’ll evaluate, critique, and improve AI-generated JavaScript code. Your feedback helps ensure the next generation of AI tools produces code that is correct, efficient, and aligned with modern engineering standards.

This is a fully remote, flexible contract role with 10–40 hours/week and onboarding/training support (no prior AI experience required).

What you’ll do

• Evaluate AI-generated JavaScript for:
  • correctness
  • efficiency
  • compliance with modern ES6+ standards
• Review DOM manipulation approaches and identify:
  • performance issues
  • anti-patterns
• Tackle complex UI/UX scenarios to assess whether the model can produce responsive, interactive frontend solutions
• Identify bugs and suboptimal frontend logic; provide optimized alternatives
• Write human-readable documentation covering:
  • state flow
  • event handling
  • code structure
• Work independently and asynchronously on your own schedule

Requirements

• Deep, hands-on knowledge of core JavaScript, including:
  • async/await
  • closures
  • the event loop
  • DOM manipulation
• 3–5 years practical experience with modern frontend frameworks such as React, Vue, or Node.js
• Strong instincts for clean, maintainable, efficient frontend code
• Detail-oriented, systematic approach to code quality evaluation
• Clear written communicator able to explain technical reasoning in plain terms
• Bachelor’s degree in Computer Science or related technical field (preferred)

Nice to have

• Experience with data labeling, RLHF, or other AI training/evaluation work
• Familiarity with testing frameworks, code review workflows, or frontend performance profiling
• Background in technical writing or code documentation

Why join Alignerr

• Work on cutting-edge AI projects alongside leading AI research teams
• Fully remote and flexible schedule
• Meaningful, task-based engineering work with potential for ongoing extension