Frontend UI Engineer — Pixel-Perfect TypeScript & CSS

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. We help people start and grow careers teaching AI by connecting contributors with practical projects, helping them build a portfolio, and providing a single place to manage contract work.

OpenTrain is the hiring and contracting organization for every role listed here. Creating an OpenTrain account is free and the platform supports flexible, remote work that fits around study, family, or other jobs.

About This Role

We're hiring a Frontend UI Engineer to translate component style guides and interface screenshots into responsive, accessible, and high-performance web components. This contract, part-time role focuses on pixel-perfect implementation, attention to interaction details, and clear asynchronous collaboration.

This position emphasizes visual fidelity, consistency with design systems, accessibility standards, and optimizing UI performance across devices.

What You'll Do

You will take visual references and established style guides and deliver production-ready front-end components that match designs closely and work smoothly across screen sizes.

• Interpret component style guides and screenshots into precise, pixel-accurate UI deliverables.
• Build responsive web components using TypeScript and CSS3 that perform well on desktop and mobile.
• Maintain visual consistency with existing design systems and meet accessibility standards.
• Document decisions, surface design ambiguities, and collaborate asynchronously with product and design stakeholders.
• Identify and resolve inconsistencies in design specifications and improve UI performance.

Requirements

Candidates must demonstrate front-end engineering skill and the ability to reproduce detailed visual designs. This role is entry-level friendly but expects clear evidence of the required skills.

• Proven experience building pixel-perfect interfaces from detailed visual references.
• Strong TypeScript and CSS3 skills and solid knowledge of responsive web design.
• Experience working with component style guides and design systems.
• Understanding of accessibility standards (WCAG-level considerations) in UI implementation.
• Strong English communication skills for clear written documentation and asynchronous collaboration.
• Ability to work autonomously in a distributed, remote environment.
• Advanced degree in Computer Science or related field is a plus (optional).

Logistics & Compensation

This is a contract, part-time role requiring at least 20 hours per week. The position is fully remote and open worldwide; English fluency is required for collaboration and documentation.

Pay is hourly under a PAY_PER_HOUR arrangement at USD $40–50 per hour, reflecting range provided.

• Employment type: Contractor, Part-time.
• Time requirement: 20+ hours/week.
• Pay: $40–50 USD per hour (PAY_PER_HOUR).
• Location: Worldwide (remote). English required.

Who Should Apply

Apply if you enjoy translating visual design into precise front-end code, care about polish and performance, and can work independently while communicating clearly in writing. This role suits developers who want flexible, remote contract work contributing to how AI tooling is built.

• Entry-level candidates with a strong portfolio of pixel-perfect UI work are encouraged to apply.
• Experienced front-end engineers seeking flexible contract work are also welcome.

How It Works

To apply, create a free OpenTrain account, complete your profile, and submit your application. Successful candidates will collaborate asynchronously, deliver components from design references, and document decisions and questions clearly.

OpenTrain connects you to steady, flexible AI-training work and helps you build a portfolio of contracts and deliverables you control.

• Create a free OpenTrain account and complete your profile.
• Prepare examples of pixel-perfect UI work and TypeScript/CSS projects to share.
• Apply through OpenTrain and follow the onboarding instructions if selected.