Frontend JavaScript Engineer
Sundayy
full-remotemidcontractfrontend United States 2 days ago via LinkedIn
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JavaScriptReactVue.jsDOM ManipulationAsync/AwaitCode ReviewFrontend PerformanceUI/UXTechnical WritingES6+
About the role
Role Overview
Join as a Frontend JavaScript Engineer on a fully remote, flexible contract (freelance) basis. You will evaluate, critique, and improve AI-generated JavaScript code, shaping the quality and usability of next-generation AI tools for developers.
Responsibilities
- Evaluate AI-generated JavaScript for correctness, efficiency, and ES6+ best practices
- Review and improve DOM manipulation approaches; identify performance issues and anti-patterns
- Test whether AI models can produce responsive, interactive frontend experiences by solving UI/UX challenges
- Identify bugs and suboptimal patterns in generated frontend logic; propose optimized, maintainable alternatives
- Write clear, human-readable documentation explaining code structure, state flow, and event handling
- Work independently and asynchronously, managing your own schedule to meet deadlines
Requirements
- Deep, hands-on knowledge of core JavaScript concepts, including:
- async/await
- closures
- event loop
- DOM manipulation
- 3–5 years of practical experience with modern frameworks such as React, Vue, or Node.js
- Strong instincts for clean, maintainable, efficient frontend code
- Systematic approach to code quality evaluation and improvement
- Excellent written communication to explain technical reasoning
- Bachelor’s degree in Computer Science (preferred)
Nice to Have
- Experience with data labeling, RLHF, or AI training/evaluation
- Familiarity with testing frameworks, code review workflows, and frontend performance profiling
- Background in technical writing or documentation
About Sundayy
Alignerr (listed as Sundayy) is a technology organization focused on advancing AI and machine learning solutions. It collaborates with AI research labs and industry partners to develop tools that help AI understand and generate code, with an emphasis on innovation, quality, and remote flexibility.
Scraped 4/19/2026