Frontend JavaScript Engineer

Role overview

Alignerr is hiring Frontend JavaScript Engineers (AI Training) to evaluate, critique, and improve AI-generated JavaScript code. You’ll help ensure next-generation AI coding tools produce solutions that align with modern engineering standards.

Type: Hourly contract (10–40 hours/week) • Location: Fully remote

What you’ll do

• Evaluate AI-generated JavaScript for:
  • correctness
  • efficiency/performance
  • adherence to modern ES6+ standards
• Review DOM manipulation approaches and identify performance issues or anti-patterns
• Tackle complex UI/UX challenges to test the quality of responsive, interactive frontend solutions
• Find bugs and suboptimal patterns in AI-written frontend logic and provide optimized alternatives
• Write human-readable documentation covering:
  • state flow
  • event handling
  • code structure
• Work independently and asynchronously on your own schedule

Who you are

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

Nice to have

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

Why Join Us

• Work on cutting-edge AI projects alongside leading AI research labs and teams
• Fully remote, flexible contract with task-based autonomy
• Direct impact on how AI understands and generates JavaScript
• Potential for ongoing work and contract extension