Frontend Web Developer (HTML/CSS/JS) — India, C1/C2

About OpenTrain

OpenTrain is the #1 platform for people building careers in AI training and data labeling. We hire and contract contributors to help shape how modern AI systems behave — and we pay for real work that improves models and datasets.

We offer flexible, remote roles that let you work part-time or full-time with clear, technical tasks. For this project, OpenTrain is the hiring organization and will manage onboarding, tasks, and payments.

• Remote, contractor-friendly work with flexible scheduling.
• Work directly on data used to train and evaluate AI systems.
• Create transferable experience in an industry that’s rapidly growing.

About AI training and why it matters

AI training (data labeling/annotation) is the human work behind every major AI system. People prepare examples, evaluate outputs, and refine code/annotations so models learn to behave correctly.

This role focuses on the frontend web domain: your technical skills and careful annotations will be used to build better web-focused training data and code examples for models.

• Contribute to state-of-the-art AI by creating high-quality, reproducible annotations and code.
• Gain hands-on experience that’s highly relevant to web engineering and ML-assisted tooling.

The role

You will analyze website screenshots, create challenging question-and-answer pairs, produce sketch-style annotations (e.g., marking elements or layout regions), and edit or improve HTML/CSS/JS code to meet task specifications.

Work is contractor, part-time, remote, and requires immediate availability. Tasks emphasize precision, creativity, and technical skill to produce high-quality artifacts used for model training and evaluation.

• Schedule: 20+ hours per week.
• Pay: $13 USD per hour (PAY_PER_HOUR).
• Employment Types: Contractor, Part-time.
• Label types include bounding boxes and programming/coding annotations.

What you'll do (key responsibilities)

Daily tasks combine visual analysis with frontend coding. Expect short, focused assignments that require reading a screenshot or spec, annotating UI elements, and producing working HTML/CSS/JS edits or examples.

• Create challenging question-and-answer pairs about web layouts and components.
• Draw sketch annotations or bounding boxes on screenshots to identify elements and layout areas.
• Edit and optimize HTML, CSS, and JavaScript based on task requirements.
• Ensure responsive behavior, cross-browser compatibility, and clean, maintainable code.
• Deliver work promptly and follow task-specific guidelines for format and quality.

Requirements

Candidates must meet all of the following requirements. OpenTrain will verify documentation and readiness to start immediately.

• Location: Must be located in India.
• Language: English proficiency at C1 or C2 level, with official documentation to validate this level.
• Experience: Minimum 2 years hands-on frontend development using HTML, CSS, and JavaScript.
• Technical skills: Strong understanding of responsive design, cross-browser compatibility, and code optimization.
• Availability: Able to start immediately and commit to project timelines (20+ hrs/week).
• Attention to detail: Ability to create precise annotations and produce high-quality code edits.

Interview questions and evaluation

We evaluate candidates with open-ended technical and writing questions to judge both frontend skill and English proficiency. Interviewers should use non-leading questions (ask open questions such as 'What is your English level?' and 'How many years of HTML/CSS/JS experience do you have?').

• Technical — HTML: Explain the difference between semantic and non-semantic HTML elements and why semantic elements matter.
• Technical — CSS: How would you design a responsive navigation bar? What techniques or tools would you use to ensure it works across devices?
• Technical — JavaScript: Describe event delegation and give an example where it’s preferable to attaching listeners directly.
• English proficiency — Writing task 1: Describe a challenging project you recently worked on and how you overcame the difficulties (detailed response required).
• English proficiency — Writing task 2: Explain a complex technical issue to a non-technical client in clear, accessible language (detailed response required).
• Documentation requirement: Ask whether the candidate already has official C1/C2 documentation and request they share it within the day. Candidates who cannot provide documentation immediately should be scored 5 or lower on the interview score.

How to apply

Apply through your OpenTrain account with the following information. Applications that omit required documentation or the open-ended responses below cannot be considered.

• Confirm you are located in India and available to start immediately.
• State your English level (C1/C2) and whether you can provide official documentation today.
• State your years of hands-on HTML/CSS/JS experience and relevant examples of past work.
• Answer the interview writing prompts included above in your application.
• Include your weekly availability (confirm 20+ hrs/week) and any other scheduling constraints.