Find remote AI training and data labeling jobs open to applicants in Brazil.
Review Finnish and English content, test reasoning, validate claims, and give detailed feedback that helps improve AI models. This remote, one-month contract offers 20 or more hours per week, with up to 40 hours preferred.
Posted Jul 16, 2026
Review and improve AI-generated code, create coding datasets, and test software engineering models across the development lifecycle. This flexible contractor role requires strong production software experience and partial PST overlap.
Posted Jul 16, 2026
Evaluate large language models on real coding tasks, test open-source repositories, and review software-engineering datasets. This worldwide contractor role requires English fluency and 20+ hours per week.
Posted Jul 16, 2026
Create and review advanced math questions, logic problems, and written solutions used to train language models. This remote contract role requires strong English and 20+ hours per week.
Posted Jul 16, 2026
Evaluate AI model responses, write Python solutions, and create training data in a fully remote, one-month contractor assignment. Choose 20, 30, or 40 hours per week with Pacific Time overlap.
Posted Jul 16, 2026
Work remotely as a Data Scientist/Analyst evaluating AI models, ranking responses, building training datasets, and analyzing results with Python. Choose 20, 30, or 40 hours per week with Pacific Time overlap.
Posted Jul 16, 2026
Evaluate personalized AI responses in Portuguese by testing conversations, checking factual grounding, comparing outputs, and writing clear reasoning. This remote contractor role pays $15 per hour.
Posted Jul 15, 2026
Evaluate how a conversational AI model uses personal context in German. Create multi-turn prompts, compare responses, and document evidence-based judgments at $15 per hour for a three-month remote contract.
Posted Jul 15, 2026
Review and improve AI-generated social content, write platform-specific posts and strategy notes, and rate model responses. This contract, part-time role pays up to $30 to $55 per hour and requires 20+ hours weekly, 5+ years of professional social media experience, and C1 English.
Posted Jul 9, 2026
Review and improve AI-generated radiology content, assess imaging decisions and clinical reasoning, and write expert answers. This part-time contract pays up to $50 to $120 per hour for 20+ hours weekly.
Posted Jul 9, 2026
Review and rank AI-generated physics answers, find errors, and write model solutions for up to $30 to $70 per hour. This part-time contractor role requires 20+ hours weekly and is open to candidates in Australia, Brazil, Canada, Germany, India, New Zealand, the United Kingdom, and the United States.
Posted Jul 9, 2026
Review and rate AI-generated legal support responses, create paralegal templates and research content, and assess legal reasoning for up to $20 to $50 per hour. This part-time contract role requires 20+ hours each week and C1 English.
Posted Jul 9, 2026
Review AI-generated clinical responses, assess diagnosis and treatment reasoning, and write expert medical feedback. This contract role pays up to $150 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Use Ubuntu/Linux to complete structured AI data training tasks, record your actions, and check your work for mistakes. This part-time role pays up to $10 to $20 per hour and is open to entry-level contributors.
Posted Jul 9, 2026
Review AI-generated TypeScript code and explanations, apply detailed rubrics, and give clear feedback. This remote contractor role pays up to $60 per hour and requires 20+ hours per week.
Posted Jul 9, 2026
Review and improve AI-generated tax and audit responses, create reference answers, and rank model outputs. This remote contractor role pays up to $40 to $80 per hour, varies by country, and requires 20+ hours per week.
Posted Jul 9, 2026
Review AI-generated Swift and iOS code for correctness, performance, maintainability, and UI logic. This remote part-time contract pays up to $55 per hour for about 20 hours weekly over 1 to 3 months.
Posted Jul 9, 2026
Work remotely as an expert SQL Engineer evaluating AI-generated queries, database designs, and data-processing logic for up to $50 per hour. The role requires 20+ hours per week and strong database engineering experience.
Posted Jul 9, 2026
Review and improve AI-generated SEO and digital marketing work, write expert prompts and strategy materials, and rate model responses. This contractor role pays up to $30 to $65 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review Scala and JVM code, write model answers, and rate AI responses for correctness, safety, and performance at up to $70 per hour. Work 20+ hours weekly as a part-time contract contributor.
Posted Jul 9, 2026
Review and rate AI-generated Rust code, write model solutions, and give precise feedback on ownership, lifetimes, safety, and reasoning. This remote contract role pays up to $60 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated Ruby and Rails code, assess reasoning and code quality, and write clear technical feedback. This part-time contract pays up to $55 per hour and requires 20+ hours each week.
Posted Jul 9, 2026
Work 20+ hours per week reviewing AI-generated risk content and creating expert training examples. This part-time Risk Management Expert role pays up to $50 to $90 per hour and is open across 17 countries.
Posted Jul 9, 2026
Earn up to $55 per hour reviewing AI-generated responses, checking statistical methods, and writing accurate R solutions. This remote contract role requires 20+ hours weekly, strong English, and at least two years of R experience.
Posted Jul 9, 2026
Review and compare AI-generated Python solutions, explanations, and technical reasoning for up to $60 per hour. This expert contract role requires 20+ hours per week, C1 English and Chinese, and strong production Python experience.
Posted Jul 9, 2026
Review and score AI-generated answers about epidemiology, prevention, policy, and population health. This remote contractor role pays up to $45 to $70 per hour and requires advanced public health knowledge.
Posted Jul 9, 2026
Review and improve AI-generated PR and communications content, then create press releases, statements, pitches, and other model-training examples. This remote contractor project pays up to $40 to $70 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review Portuguese AI training content, trainer work, and QA submissions for accuracy, fluency, and cultural fit. This part-time contract role pays up to $35 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated responses for accuracy, reasoning, clarity, and Portuguese localization. This remote contractor role is open in Brazil and Portugal, offers up to $30 per hour, and requires 5+ years of translation or localization experience.
Posted Jul 9, 2026
Review and improve AI-generated PHP code, backend designs, and technical explanations for up to $60 per hour. The part-time contract requires expert PHP skills and 20+ hours per week.
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.
