Find remote AI training and data labeling jobs open to applicants in Brazil.
Review and improve AI-generated PHP code, backend designs, and technical explanations. Earn $60 per hour while evaluating security, performance, architecture, and prompt adherence.
Posted Jul 9, 2026
Use your pharmacy expertise to review medication AI responses, assess dosing and safety, and create reliable clinical answers. This remote contractor role pays $35 to $65 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and rank AI-generated clinical answers, identify safety risks, and write expert reference responses. This remote contractor role pays $40 to $90 per hour and requires advanced nursing credentials, licensure eligibility, and C1 English.
Posted Jul 9, 2026
Review and improve AI-generated nursing and clinical-care responses for safety, accuracy, and clear reasoning. This remote contractor role pays $40 to $65 per hour and requires an active nursing qualification.
Posted Jul 9, 2026
Review and rank AI-generated medical answers for accuracy, clinical reasoning, and patient safety. This remote contractor role pays $90 per hour and requires strong healthcare expertise and C1 English.
Posted Jul 9, 2026
Review and improve AI-generated mechanical engineering content as a remote contractor earning up to $70 per hour. Work 20+ hours weekly and use your engineering expertise to assess technical accuracy and reasoning.
Posted Jul 9, 2026
Review AI-generated math answers, check proofs and calculations, and write clear model solutions for $70 per hour. This part-time contract requires 20+ hours weekly and advanced mathematics training.
Posted Jul 9, 2026
Review AI-generated market research and create expert research deliverables, including surveys, competitor scans, and insight summaries. Earn $30-$65 per hour with 20+ hours per week in a remote contractor role.
Posted Jul 9, 2026
Review AI-generated Kotlin answers for correctness, reasoning, and code quality, then write expert explanations and model solutions. This remote, part-time contract role pays $55 per hour and requires 2+ years of Kotlin development experience.
Posted Jul 9, 2026
Review AI-generated JavaScript code, write better solutions, and rate model responses for accuracy and reasoning. This remote contract offers flexible part-time work of about 20 hours per week.
Posted Jul 9, 2026
Review AI-generated Java code, architecture, and technical explanations while writing reference solutions and feedback. This remote contractor role pays $55 per hour and requires 20+ hours each week.
Posted Jul 9, 2026
Use your insurance expertise to review AI-generated coverage, claims, and underwriting responses, create accurate reference answers, and improve model reasoning. This contractor role pays $40-$70 per hour and requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve AI-generated brand strategy, positioning, messaging, and go-to-market work. This expert contract role pays $35 to $85 per hour and requires 20 or more hours each week.
Posted Jul 9, 2026
Review and write fintech, payments, and crypto AI content as a subject matter expert. Evaluate model reasoning, safety, compliance, and technical accuracy for $35-$100 per hour.
Posted Jul 8, 2026
Review AI-generated financial analysis, check models and valuations, and write expert feedback and reference outputs. This remote contractor role pays $50 to $85 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Review and improve AI-generated dental content, including diagnoses, treatment plans, radiographs, prescribing, emergencies, and patient counseling. This remote contractor role pays $50 to $90 per hour and requires a dental degree, licensure eligibility, and five years of clinical experience.
Posted Jul 8, 2026
Review AI-generated compliance, regulatory, and risk content, write expert feedback, and create policies and controls for training data. This contractor role pays $40-$95 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Review AI-generated contract analyses and drafting, identify legal and commercial risks, and write clear feedback and redlines. This remote contractor role pays $40-$100 per hour and requires substantial contract experience.
Posted Jul 8, 2026
Review AI-generated Go code, explanations, and backend solutions for correctness, clarity, and idiomatic style. This remote contract role pays up to $60 per hour and requires 20+ hours per week.
Posted Jul 8, 2026
Review and improve AI-generated electrical engineering answers, calculations, and explanations. This contract role pays $40 to $100 per hour and requires 20+ hours each week.
Posted Jul 8, 2026
Review and improve AI-generated marketing content, from emails and landing pages to ads and long-form guides. Earn $25 to $55 per hour as a remote contractor working 20+ hours weekly.
Posted Jul 8, 2026
Review and improve AI-generated clinical research content for $40-$70 per hour. Use your expertise in study design, statistics, evidence appraisal, and scientific writing in a flexible remote contractor role.
Posted Jul 8, 2026
Review and improve AI-generated civil engineering content across structural, geotechnical, transportation, and water topics. This remote contract role pays $45 to $100 per hour and is open to qualified candidates in 17 countries.
Posted Jul 8, 2026
Review and compare AI-generated chemistry answers, check calculations and concepts, and write accurate explanations. This expert contractor role pays $30-$70 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Review and improve AI-generated chemical engineering content for technical accuracy, safety, calculations, and process reasoning. This remote contract pays $40 to $100 per hour and requires 20+ hours per week.
Posted Jul 8, 2026
Review and rank AI-generated C++ code, systems designs, and technical explanations. This remote contractor role pays $65 per hour and requires expert modern C++ and systems programming experience.
Posted Jul 8, 2026
Review and improve AI-generated C# and .NET responses, write technical explanations, and help models learn from expert feedback. This remote contractor role pays $35 to $65 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Review AI-generated accounting responses, write expert reference content, and rate reasoning for accuracy under GAAP or IFRS. This remote contractor role offers 20+ hours weekly and country-based rates of up to $65 per hour.
Posted Jul 8, 2026
Review AI-generated legal answers, assess reasoning and risk, and write model legal content. This remote contract role pays $40 to $120 per hour and requires a law degree, bar eligibility, five years of practice, and C1 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 $40-$100 per hour and requires 20+ hours weekly.
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.
