Find remote AI training and data labeling jobs open to applicants in Brazil.
Create and evaluate Russian and English training data for large language models. Research claims, write reasoning tasks, and explain answers while working 20 or more hours each week with US Pacific time overlap.
Posted Jul 16, 2026
Review Finnish and English content, test reasoning and factual accuracy, and give detailed feedback to improve language models. This is a remote, one-month contractor assignment with 20+ hours per week and compensation based on experience.
Posted Jul 16, 2026
Review and improve AI-generated code across major programming languages, from design through production operations. This flexible contractor role requires strong software engineering experience and partial PST availability.
Posted Jul 16, 2026
Evaluate large language models on real coding problems, inspect open-source repositories, and test bug-fixing tasks locally. This contract role is open worldwide, requires English, and offers 20 or more hours per week.
Posted Jul 16, 2026
Create and evaluate mathematical reasoning content for language models. Analyze problems, validate claims, and explain solutions clearly in a remote contract role requiring 20+ hours each week.
Posted Jul 16, 2026
Evaluate large language model responses, write Python solutions, and create training data in a fully remote one-month contract. Commit to 20, 30, or 40 hours per week with Pacific Time overlap.
Posted Jul 16, 2026
Evaluate AI models, rank responses, build fine-tuning datasets, and write Python solutions in a fully remote data science contract. Choose 20, 30, or 40 hours per week with four hours of daily Pacific Time overlap.
Posted Jul 16, 2026
Evaluate Portuguese AI responses for natural, accurate personalization in realistic conversations. This three-month contractor role pays $15 per hour and offers 20 or more hours per week.
Posted Jul 15, 2026
Review German-language AI conversations, test how models use personal context, and compare responses for accuracy and naturalness. This remote contractor role pays $15 per hour and requires 20+ hours per week.
Posted Jul 15, 2026
Use your social media expertise to create strong posts and strategy notes, then rate AI responses for quality, platform fit, safety, and brand voice. This contract role pays $30-$55 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and rank AI-generated radiology responses, write expert imaging content, and assess clinical safety. This contractor role pays $50-$120 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Use advanced physics knowledge to review AI answers, find errors, rank reasoning, and write model solutions. This contract role pays $30-$70 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated legal support work, rate legal reasoning, and create prompts, templates, checklists, and research summaries. This remote contractor role pays $20-$50 per hour and requires four or more years of paralegal or legal assistant experience.
Posted Jul 9, 2026
Review and improve AI-generated clinical responses for accuracy, safety, diagnosis, treatment planning, and medical reasoning. This contractor role pays $150 per hour and requires 20+ hours per week.
Posted Jul 9, 2026
Install tools on Ubuntu/Linux, follow written instructions, record structured tasks, and check your work. This part-time role pays $10 to $20 per hour and is open to candidates in selected countries.
Posted Jul 9, 2026
Review AI-generated TypeScript code and technical explanations, apply clear evaluation guidelines, and give evidence-based feedback. This remote contractor role pays $60 per hour and requires 20+ hours per week.
Posted Jul 9, 2026
Review and improve AI-generated tax and audit responses, create expert model solutions, and rate technical accuracy. This remote contractor role pays $40 to $80 per hour and requires 5+ years of relevant experience.
Posted Jul 9, 2026
Review AI-generated Swift and iOS code for correctness, performance, maintainability, and UI logic. This remote contractor role pays $55 per hour, offers flexible part-time work, and is estimated at about 20 hours weekly for 1 to 3 months.
Posted Jul 9, 2026
Review AI-generated SQL queries, database designs, and data-processing logic, then write reference solutions that help improve AI systems. This remote contractor role pays $50 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve AI-generated SEO and digital marketing work, write expert briefs and strategy notes, and rate model responses. This contractor role pays $30 to $65 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve AI-generated Scala code, system designs, and technical explanations for $70 per hour. This remote contractor role requires strong Scala, JVM, concurrency, and distributed systems experience, plus 20+ hours per week.
Posted Jul 9, 2026
Review AI-generated Rust code and explanations, write model solutions, and rate reasoning, safety, and prompt adherence. This remote contract pays $60 per hour for 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated Ruby and Ruby on Rails code, assess reasoning and code quality, and write clear technical feedback. This remote contract role pays $55 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve AI-generated risk management content, including risk assessments, control mappings, mitigation plans, and incident response scenarios. Earn $50-$90 per hour with a 20+ hour weekly commitment.
Posted Jul 9, 2026
Review AI-generated responses, check statistical methods, and write accurate R solutions for AI training. This remote contract role pays $55 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated Python solutions and technical explanations for correctness, code quality, performance, and reasoning. Earn $60 per hour with 20+ hours weekly and use C1 English and Chinese.
Posted Jul 9, 2026
Review and rate AI-generated public health answers for accuracy, safety, evidence, and reasoning. This remote contractor role pays $45-$70 per hour and requires 5+ years of public health experience.
Posted Jul 9, 2026
Review and improve AI-generated PR and communications content, including press releases, statements, FAQs, and crisis-response materials. This remote contractor project pays $40 to $70 per hour and requires 5+ years of professional experience.
Posted Jul 9, 2026
Review Portuguese AI training content, trainer work, and QA submissions for accuracy, fluency, and localization quality. This part-time contractor role pays $35 per hour and requires 20+ hours weekly in Brazil or Portugal.
Posted Jul 9, 2026
Review AI-generated responses for accuracy, reasoning, clarity, and Portuguese localization. This remote contract role offers up to $30 per hour and requires 20+ hours per week from candidates in Brazil or Portugal.
Posted Jul 9, 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.
