Frontend UI Developer

About OpenTrain

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• Remote contract opportunity
• Part-time schedule of less than 20 hours per week
• Work with modern AI-training and software-development workflows

About AI Training Work

AI training is the human side of building artificial intelligence. Developers, writers, reviewers, and other specialists prepare examples, assess outputs, and improve the data and tools used to make AI systems more capable. This fast-growing field offers flexible remote work that can fit around other commitments.

• Contribute to how modern AI systems are developed
• Use your software and user-experience expertise in practical projects
• Work remotely with a flexible, part-time schedule

The Role

As a Frontend UI Developer, you will implement and refine user-facing features, build responsive components, and improve interfaces for usability and visual quality. The work centers on modern web development and UI/UX engineering, with an emphasis on clean implementation, accessibility, performance, and reproducible reasoning.

You should have 2–4 years of professional frontend or full-stack experience and strong proficiency in at least one of React, Angular, Next.js, or Svelte. Compensation is $10–$30 per hour, with potential rates of $40–$50 per hour for exceptional developers based on portfolio strength, speed, quality, and UX craftsmanship.

• Contract, part-time engagement
• Expected availability: 17–20 hours per week
• Ideal availability: 8 hours per day, with a minimum of 3 hours per day
• Pilot pace of 2,500–5,000 items within 1 week

What You’ll Do

You will create polished frontend experiences and document the reasoning behind your work so results can be reproduced. The role includes collaborating with coding agents and modern development tooling while maintaining a high standard for usability and code quality.

• Implement and refine user-facing web features
• Build responsive components and cross-browser interfaces
• Apply strong CSS skills using Tailwind or Bootstrap
• Optimize interfaces for accessibility and performance
• Write clean, maintainable code
• Document implementation decisions and reasoning clearly
• Work with Git, npm, bundlers, CI, and modern JavaScript tooling
• Collaborate with coding agents and contemporary development workflows

Requirements

This opportunity is suited to developers with professional frontend or full-stack experience, a refined eye for design, and the communication skills needed to explain technical decisions. A bachelor’s degree in computer science or a related field is preferred, and experience with coding agents such as Lovable is a plus.

• 2–4 years of professional frontend or full-stack development experience
• Strong proficiency in React, Angular, Next.js, or Svelte
• Excellent command of CSS, including Tailwind or Bootstrap
• Strong UI/UX judgment and attention to visual quality
• Conversational English at B1/B2 level
• Clear documentation and communication skills
• Git workflow experience and familiarity with npm, bundlers, and CI
• Ability to deliver responsive, accessible, performant interfaces
• Two or three public web app URLs that you built

Who Should Apply

Apply if you enjoy turning product requirements into polished interfaces and can balance visual detail with maintainable engineering. Your portfolio should demonstrate the quality of your frontend work, and your application should include links to two or three public web applications you built.

• Frontend developers with strong hands-on UI implementation skills
• Full-stack developers with a clear frontend portfolio
• Developers who care about accessibility, performance, and usability
• Candidates comfortable explaining decisions in written English
• Applicants experienced with coding agents may have an advantage

How to Apply

Create a free OpenTrain account, complete your profile, and apply through OpenTrain. Include your public web app links and highlight the frontend frameworks, CSS tools, JavaScript tooling, and relevant UI/UX work you have used.

• Apply through OpenTrain AI
• Include two or three public web app URLs
• Showcase your strongest examples of responsive UI work
• State your relevant framework, tooling, and coding-agent experience