Find remote AI training and data labeling jobs open to applicants in Brazil.
Review and rate AI-generated medication answers, write expert pharmacy responses, and identify safety issues. This remote contractor role pays up to $35 to $65 per hour and requires 20+ hours weekly, pharmacy expertise, and C1 English.
Posted Jul 9, 2026
Review AI-generated clinical responses, assess diagnosis and medication safety, and write expert answers as a Nurse Practitioner. This remote contract role pays up to $40 to $90 per hour and requires 20+ hours each week.
Posted Jul 9, 2026
Review and rate AI-generated nursing and clinical-care responses, write expert explanations, and assess safety, triage, medication guidance, and care planning. This remote contract role pays up to $40 to $65 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated medical responses for accuracy, clinical reasoning, and patient safety. This remote contractor role pays up to $90 per hour and requires 20+ hours weekly plus strong medical expertise and C1 English.
Posted Jul 9, 2026
Review and rate AI-generated mechanical engineering solutions, write model explanations, and assess technical reasoning. This remote contractor role pays up to $70 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review AI-generated mathematics answers, check proofs and calculations, and rank responses for correctness and reasoning quality. This part-time contractor role pays up to $70 per hour and requires 20+ hours per week.
Posted Jul 9, 2026
Review AI-generated market research, test its methods and conclusions, and create reference-quality research deliverables for up to $30 to $65 per hour. This remote contract role offers 20+ hours each week and requires advanced English plus substantial market research experience.
Posted Jul 9, 2026
Review and improve AI-generated Kotlin answers for accuracy, clarity, prompt adherence, and technical soundness. This remote contract role pays up to $55 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve AI-generated JavaScript code, compare model responses, and explain technical issues clearly. This remote contract role pays up to $60 per hour for about 20 hours weekly, with flexible scheduling.
Posted Jul 9, 2026
Review AI-generated Java code, architecture, and technical explanations for up to $55 per hour with a 20+ hour weekly commitment. Use your senior Java expertise to rate answers, write reference implementations, and provide structured feedback.
Posted Jul 9, 2026
Review AI-generated insurance content, create reference answers, and rate reasoning on claims, coverage, underwriting, and policy communication. This expert contractor role pays up to $40 to $70 per hour and requires 20 or more hours each week.
Posted Jul 9, 2026
Review and improve AI-generated brand strategy, positioning, messaging, and go-to-market work. This part-time expert role pays up to $35 to $85 per hour and requires 5+ years of relevant experience.
Posted Jul 9, 2026
Review and write fintech, payments, and crypto content for AI training at up to $35 to $100 per hour. This part-time role requires 5+ years of relevant experience, strong English, and 20+ hours each week.
Posted Jul 8, 2026
Review and improve AI-generated financial analysis covering modeling, valuation, forecasting, and unit economics. This remote contractor role pays up to $50 to $85 per hour and requires 5+ years of professional finance experience.
Posted Jul 8, 2026
Review and improve AI-generated dental content as a dentist with clinical experience. Work remotely for up to $50 to $90 per hour, with 20+ hours per week and applications through OpenTrain.
Posted Jul 8, 2026
Review and rank AI-generated compliance, regulatory, and risk content, write expert feedback, and create policies and controls. This part-time contract pays up to $40 to $95 per hour for 20+ hours weekly.
Posted Jul 8, 2026
Review AI-generated contract analyses, assess legal reasoning, and write clear feedback, redlines, and clause improvements. This remote contract role pays up to $40 to $100 per hour, requires 20+ hours weekly, and is open to candidates in 17 countries.
Posted Jul 8, 2026
Review and improve AI-generated Go code, compare technical answers, and write strong backend solutions. This remote contract offers flexible work of 20+ hours per week and pay up to $60 per hour.
Posted Jul 8, 2026
Evaluate AI-generated electrical engineering answers, calculations, and explanations for technical accuracy, safety, and practical feasibility. This contract role pays up to $40 to $100 per hour for 20+ hours weekly.
Posted Jul 8, 2026
Review and improve AI-generated marketing and content writing for clarity, accuracy, tone, brand fit, and audience impact. This remote contractor role pays up to $25 to $55 per hour and requires 20+ hours each week.
Posted Jul 8, 2026
Review AI-generated clinical research content, assess study design and evidence, and write expert explanations. This remote contractor role pays up to $40 to $70 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Review and improve AI-generated civil engineering content across structural, geotechnical, transportation, water, and construction topics. Earn up to $45 to $100 per hour with 20+ hours per week and a flexible schedule.
Posted Jul 8, 2026
Review and improve AI-generated chemistry answers for accuracy, reasoning, calculations, and clear explanations. This expert contract role pays up to $30 to $70 per hour, requires 20 or more hours weekly, and is open to candidates in Brazil, Germany, India, and the United States.
Posted Jul 8, 2026
Review and improve AI-generated chemical engineering content across process design, safety, calculations, and troubleshooting. This remote contract role pays up to $40 to $100 per hour and requires 20+ hours each week.
Posted Jul 8, 2026
Review AI-generated C++ code, systems designs, and technical explanations for accuracy, safety, and performance. This remote contractor role pays up to $65 per hour for 20+ hours weekly, with applications starting on OpenTrain.
Posted Jul 8, 2026
Use your C# and .NET expertise to write, review, and improve AI-generated technical responses. This remote contractor role pays up to $35 to $65 per hour, requires 20+ hours weekly, and includes future project opportunities.
Posted Jul 8, 2026
Review AI-generated accounting answers, write reference content, and rate model responses for accuracy, clarity, and GAAP or IFRS alignment. This remote part-time contractor role pays up to $35 to $65 per hour.
Posted Jul 8, 2026
Review AI-generated legal answers, assess reasoning and risk, and write accurate legal content. This remote contractor role pays up to $40 to $120 per hour and requires legal practice experience plus fluent English.
Posted Jul 8, 2026
Review AI-generated astronomy and space science answers for accuracy, sound reasoning, uncertainty, and clear limits. This remote contract role pays up to $40 to $100 per hour and requires 4+ years of relevant experience.
Posted Jul 8, 2026
Review AI-generated C code, systems designs, and technical explanations for memory, concurrency, safety, and performance issues. This remote contractor role pays up to $65 per hour and requires 20-plus hours per week.
Posted Jul 8, 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.
