Find remote AI training and data labeling jobs open to applicants in Brazil.
Evaluate AI-generated answers, summaries, and reasoning in Arabic and English. This remote contractor assignment requires 20+ hours each week and suits entry-level candidates with strong analytical and writing skills.
Posted Jul 17, 2026
Review Italian and English content for large language models, research claims, solve analytical questions, and write clear feedback. This remote contractor role requires fluent Italian and English, 20+ hours weekly, and applications through OpenTrain.
Posted Jul 17, 2026
Work remotely for 20+ hours per week evaluating German and English large language model responses, researching claims, and writing clear feedback. Apply through OpenTrain, then complete the hiring site application.
Posted Jul 17, 2026
Evaluate French and English AI responses through research, reasoning, summarization, and structured feedback. This remote contract role is open worldwide and requires at least 20 hours weekly.
Posted Jul 17, 2026
Evaluate Chinese and English LLM content by researching claims, solving analytical problems, and explaining conclusions. This remote contractor assignment requires 20+ hours per week with some overlap with US Pacific time.
Posted Jul 17, 2026
Annotate images and short videos for multimodal AI systems. Identify scenes, actions, emotions, relationships, and story flow while validating AI-generated outputs in a flexible remote contractor role.
Posted Jul 17, 2026
Review AI-generated Go code for dialog-agent systems, test quality and correctness, and solve difficult Go issues. This role requires 20+ hours weekly, English communication, and 3+ years of software engineering experience.
Posted Jul 17, 2026
Create and solve advanced physics problems to test large language models, write detailed solutions, and help build new evaluation benchmarks. This worldwide contractor role requires strong physics knowledge, clear English communication, and 20+ hours each week.
Posted Jul 17, 2026
Evaluate advanced Biology language models by creating difficult problems, writing rigorous solutions, and giving clear feedback. This worldwide role supports 20+ hours per week and welcomes candidates pursuing or holding advanced Biology qualifications.
Posted Jul 17, 2026
Create, solve, and explain advanced chemistry problems for AI training. This remote contractor role covers postgraduate chemistry, detailed annotation, visual explanations, and constructive feedback.
Posted Jul 17, 2026
Design and solve advanced physics problems that test large language models, write clear step-by-step solutions, and give detailed feedback. This remote contractor assignment is open worldwide and requires 20+ hours per week.
Posted Jul 17, 2026
Build Java backend components, evaluate large language model responses, and create training data in a remote, part-time contractor role. The work requires strong Java, English communication, and technical judgment.
Posted Jul 17, 2026
Work remotely as a JavaScript or TypeScript full-stack developer on AI model evaluation, coding datasets, supervised fine-tuning, and human feedback. This one-month contractor assignment requires at least 20 hours per week.
Posted Jul 17, 2026
Build and review code used to train and evaluate AI models with Python and JavaScript or TypeScript. This worldwide contractor role requires 20+ hours each week and fluent English.
Posted Jul 17, 2026
Evaluate large language model responses across finance topics remotely for up to $100 per hour, with a flexible commitment of 10 to 30 hours weekly. Use professional finance experience to create rubrics and clear feedback that improves AI systems.
Posted Jul 16, 2026
Create and review board game reasoning tasks that test AI systems on strategy, probability, game rules, and logical decision-making. This contract role requires 20+ hours per week and strong board game or strategy experience.
Posted Jul 16, 2026
Evaluate personalized AI conversations, rank responses, and explain issues in Dutch for a remote one-month contractor project paying $20 per hour. Apply through OpenTrain, then complete the hiring-site application.
Posted Jul 16, 2026
Review how conversational AI uses personal context, create Vietnamese prompts, and rank responses for helpfulness and naturalness. This remote contractor role pays $15 per hour and requires 20+ hours weekly.
Posted Jul 16, 2026
Evaluate how well an AI personalizes responses in Thai using multi-turn prompts and personal context. This remote contract role pays US$15 per hour and requires 20+ hours each week.
Posted Jul 16, 2026
Evaluate Hindi AI personalization responses by writing prompts, rating model output, and explaining your decisions. The contractor role pays $15 per hour and requires 20+ hours each week.
Posted Jul 16, 2026
Review Indonesian AI responses for accurate, natural personalization, compare outputs, and write clear feedback. This part-time contract pays $15 per hour and requires at least 20 hours weekly.
Posted Jul 16, 2026
Review Turkish AI personalization responses, write evidence-based judgments, and create multi-turn prompts. The role pays $15 per hour and offers 20+ weekly hours with four hours of PST overlap.
Posted Jul 16, 2026
Create Korean multi-turn prompts and evaluate how well AI systems use personal context. Review responses, compare quality, and write evidence-based feedback for $15 per hour with 20+ hours weekly.
Posted Jul 16, 2026
Evaluate how well a conversational AI uses personal context in Chinese responses. This remote, three-month contractor role pays $15 per hour and requires at least 20 hours per week, including Pacific Time overlap.
Posted Jul 16, 2026
Earn $15 per hour evaluating personalized Spanish conversational AI responses, comparing outputs, and writing clear quality rationales. This remote, part-time contract role requires 20+ hours per week and strong Spanish writing skills.
Posted Jul 16, 2026
Evaluate personalized AI responses in Arabic by writing multi-turn prompts, comparing outputs, and explaining your judgments. This remote contractor role pays $15 per hour and requires at least 20 hours per week.
Posted Jul 16, 2026
Review Portuguese conversational AI responses for personalization quality, create realistic multi-turn prompts, and rank model outputs. This remote contractor role pays $15 per hour and requires 20+ hours per week.
Posted Jul 16, 2026
Analyze machine learning data, metrics, model outputs, and benchmark failures as a remote MLE Bench Data Analyst. This three-month contractor role requires 20 hours per week and is open in 10 countries.
Posted Jul 16, 2026
Build and validate Python data pipelines, process structured and unstructured data, and create evaluation tasks for AI systems. This 20-plus-hour contract is open to candidates in selected countries.
Posted Jul 16, 2026
Create and review Russian and English content that helps AI models reason more accurately. Research claims, write analytical prompts, and evaluate responses with 20+ hours per week worldwide.
Posted Jul 16, 2026
AI training and data labeling involve human work used to prepare and review examples for artificial-intelligence systems. Depending on the individual role, tasks can include labeling images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. For applicants located in Brazil, only the individual posting can confirm whether that opportunity accepts applications from Brazil and explain the work involved.
OpenTrain is the hiring organization for these roles, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Review each individual posting for the details and requirements that apply to that opportunity, including whether applicants located in Brazil are eligible.
