Frontend Web Developer, JavaScript And TypeScript

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. OpenTrain AI is hiring contractors for flexible, remote projects that help shape how modern artificial intelligence is built.

Create a free OpenTrain account, build your profile, and apply in minutes for opportunities that match your skills and availability.

• Remote work available worldwide
• Contractor and part-time engagement
• $35 USD per hour
• Minimum commitment of approximately 17–20 hours per week

About AI Training Work

AI training is the human side of building artificial intelligence. People with technical expertise help prepare, review, and improve the examples and evaluations used to make AI systems more capable and reliable.

Programming and frontend specialists contribute practical software knowledge to this fast-growing industry while working remotely and fitting projects around other commitments.

• Work from anywhere with a computer and internet connection
• Flexible part-time work for contributors with specialized skills
• Contribute to cutting-edge AI development through software expertise

The Role

OpenTrain is seeking Frontend Web Developers with 2–6 years of professional frontend or full-stack development experience. You will build, refine, and maintain elegant, high-performance web interfaces using JavaScript or TypeScript and one or more modern frameworks.

The work requires a strong eye for visual polish, usability, accessibility, responsive design, and smooth interactions. You will translate design mockups into production-ready components, improve existing implementations, explain your technical reasoning, and collaborate with project operations to deliver work to specification and on time.

We plan to hire up to 30 developers. The minimum availability is approximately 17–20 hours per week, with an ideal schedule of about four hours per day.

• Pay: $35 USD per hour
• Engagement: Part-time contractor
• Location: Worldwide and fully remote
• Language: Excellent written English at C1 level or higher
• Experience: 2–6 years in professional frontend or full-stack development

What You'll Do

You will combine frontend engineering skill with strong UI and UX judgment to create interfaces that are responsive, accessible, performant, and visually precise.

• Build responsive, production-ready components from Figma or Sketch mockups
• Develop with JavaScript and TypeScript
• Use React, Next.js, Vue, or Angular
• Apply advanced HTML5 and CSS3 techniques
• Work with design systems such as Tailwind, Bootstrap, or Material UI
• Review and improve existing frontend implementations
• Follow accessibility and UI/UX best practices
• Optimize performance and support cross-browser compatibility
• Document the reasoning, trade-offs, and solutions behind your work
• Collaborate with project operations and deliver to specification and schedule

Requirements

Applicants must meet the technical, communication, portfolio, and availability requirements below. A public portfolio is mandatory and will be checked during the interview.

• 2–6 years of professional frontend or full-stack experience
• Strong proficiency in JavaScript and TypeScript
• Expertise with at least one of React, Next.js, Vue, or Angular
• Advanced HTML5 and CSS3 knowledge
• Strong command of responsive layouts and accessibility
• Experience with Tailwind, Bootstrap, or Material UI
• Demonstrable attention to detail and ability to deliver pixel-perfect UI
• Understanding of performance optimization and cross-browser compatibility
• Clear written communication and ability to document reasoning and trade-offs
• Excellent written English at C1 level or higher
• Availability for at least 17–20 hours per week, preferably about four hours per day

Portfolio Requirement

During the interview, applicants must provide one public, live portfolio URL demonstrating their frontend or full-stack work. The link must be accessible online and may be hosted on a platform such as Dribbble, Behance, GitHub Pages, CodePen, or Vercel.

Applications without a public portfolio link will not be reviewed. Only links are accepted; do not submit files, screenshots, or private portfolio links.

• Required: one public, live portfolio URL
• Accepted examples include Dribbble, Behance, GitHub Pages, CodePen, and Vercel
• Files and screenshots are not accepted
• Private links are not accepted
• The portfolio should show visual polish, usability, and frontend implementation quality

Who Should Apply

This opportunity is suited to frontend engineers and full-stack developers who enjoy turning designs into polished interfaces and can clearly explain their implementation choices. It is especially relevant for people experienced with modern JavaScript ecosystems, design systems, accessibility, and responsive web development.

If you have a strong public portfolio, can commit the required weekly hours, and want to apply your technical skills to the growing AI training industry, create your free OpenTrain profile and apply.

• Frontend developers with a strong eye for detail
• Full-stack developers with substantial frontend experience
• Engineers comfortable working from design mockups
• Developers who value accessibility, performance, and usability
• Candidates able to communicate technical decisions clearly