About OpenTrain
OpenTrain AI is the hiring and contracting organization for this role. OpenTrain is the #1 platform for finding and building careers in AI training and data labeling, helping people discover meaningful projects, build their profiles, and apply to opportunities in minutes.
• Free OpenTrain account creation
• Contract opportunity with a 3 to 6 month expected project duration
• Candidates based in the United Kingdom, United States, or Mexico
About AI Training Work
AI training is the human side of building modern artificial intelligence. Contributors write, review, rate, and improve examples that help AI systems produce more accurate and useful results. In this project, your frontend engineering expertise will support programming-focused tasks involving code evaluation, technical solution review, and text generation.
• Work with projects connected to cutting-edge AI development
• Apply practical software engineering judgment to technical tasks
• Flexible, remote-friendly industry work that can fit alongside other commitments
The Frontend Engineer Role
OpenTrain is looking for skilled Frontend Engineers to work on frontend development, debugging, user interface improvements, and software engineering problem-solving. You will build and improve interface features, fix issues, review technical solutions, and create clear reference environments and solutions for programming tasks.
• Role type: Contractor
• Experience level: Intermediate
• Language: Fluent English
• Pay range: $65 to $120 USD per hour
• Typical listed rate: $100 USD per hour
What You'll Do
You will work across different codebases, including unfamiliar components, and use sound engineering judgment to produce clean, maintainable solutions. The work includes both hands-on implementation and evaluation of frontend code and technical approaches.
• Write clear, maintainable JavaScript and TypeScript code
• Build and improve interfaces with React or another modern frontend framework
• Fix UI bugs, layout issues, rendering problems, and state-related issues
• Build small to medium-sized frontend features and reusable components
• Improve frontend readability, performance, consistency, and code quality
• Debug issues with browser developer tools
• Review frontend code and technical solutions for correctness and quality
• Explain technical decisions and development approaches clearly
• Create reproducible frontend environments and reference solutions for technical tasks
Requirements and Preferred Qualifications
You should be comfortable working independently with existing frontend applications and communicating technical reasoning in English. The source requirements list 1+ year of hands-on frontend development experience as preferred, while an additional qualification lists 4+ years as preferred; both experience preferences should be considered when applying.
• Strong knowledge of JavaScript and/or TypeScript
• Experience with React or another modern frontend framework
• Good understanding of HTML and CSS
• Experience with responsive web design
• Understanding of component-based architecture
• Ability to troubleshoot frontend and UI issues
• Familiarity with browser developer tools
• Ability to work with existing and unfamiliar codebases
• Good communication and documentation skills
• Production-level web application experience is preferred
• Strong understanding of frontend state and rendering behavior is preferred
• Experience improving frontend performance and code quality is preferred
• Ability to quickly understand and modify existing applications is preferred
• Interest in AI and emerging technologies is a plus, but not required
Who Should Apply
This opportunity suits an intermediate Frontend Engineer who enjoys solving practical UI problems, understanding unfamiliar code, and explaining why a technical solution is correct. Apply if you can work comfortably in English and are based in the United Kingdom, United States, or Mexico.
• Frontend developers with hands-on JavaScript or TypeScript experience
• React developers familiar with component-based applications
• Engineers who combine implementation, debugging, and code review skills
• Candidates comfortable contributing to AI training and programming evaluation work
How It Works
As a contractor with OpenTrain AI, you will contribute to a project expected to run for 3 to 6 months. The work combines frontend development with evaluation and text-generation tasks used in AI training, giving you a direct role in improving how AI systems handle software engineering problems.
• Apply through OpenTrain
• Complete project-specific onboarding or evaluation steps if requested
• Contribute in fluent English throughout the project
• Use your frontend expertise to build, review, and explain technical solutions