Posted Aug 14, 2026

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

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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.