Software Engineer - Frontend

Alignerr is seeking experienced frontend engineers to shape AI models relied upon by millions of developers. The role involves reviewing, writing, and refining high-quality UI coding problems and solutions for cutting-edge AI systems, with a focus on clean code and impactful contributions.

Responsibilities:

• Review and evaluate AI-generated frontend code (JavaScript, HTML, CSS) for correctness, efficiency, accessibility, and clarity
• Write high-quality solutions to UI and web development problems across a range of difficulty levels
• Craft clear, thorough explanations for design decisions, code logic, and problem-solving approaches
• Identify edge cases, ambiguities, and weaknesses in problem statements or AI-generated responses
• Help set the quality bar for what great frontend code looks like — at scale

Requirements:

• Fluent in English with strong written communication skills — you can explain complex frontend concepts clearly
• Deep expertise in JavaScript: async/await, closures, DOM manipulation, ES6+ syntax, browser APIs
• Experienced with modern frontend frameworks and tooling such as React, Vue, or Angular
• Detail-oriented, with a strong instinct for catching subtle bugs and edge cases
• Self-motivated and comfortable working independently in an asynchronous environment
• 3–5+ years of professional frontend development experience
• Bachelor's, Master's, or PhD in Computer Science or a related field
• Prior experience with data labeling, RLHF, or AI training workflows
• Familiarity with web accessibility standards and performance optimization techniques