Find remote AI training and data labeling jobs open to applicants in Brazil.
Create advanced, non-code life sciences reasoning tasks and expert reference answers for AI evaluation. This remote contract role requires strong biological research expertise and at least 20 hours per week.
Posted Oct 20, 2026
Use your photography judgment to describe, label, and organize images for AI training. This flexible contractor role is open in listed countries and values clear writing, visual expertise, and careful data work.
Posted Oct 20, 2026
Review Bluebook and pincite rubrics, create realistic citation-checking examples, and explain corrections for an AI training project. This remote contractor role pays $50 to $80 per hour with flexible scheduling.
Posted Oct 20, 2026
Review Bluebook citation rubrics, build realistic legal citation examples, and explain the reasoning behind correct answers in a remote contract role paying $50 to $80 per hour.
Posted Oct 20, 2026
Review Bluebook and pincite citation rules, identify edge cases, and create cite-checking examples for an AI training project. Remote contract work pays $50 to $80 per hour.
Posted Oct 20, 2026
Record hands-free, first-person videos of household chores and physical tasks for AI training. This remote contractor role pays $6 per hour for accepted recorded video and offers flexible scheduling in selected Latin American countries.
Posted Oct 19, 2026
Use your dental expertise to evaluate AI outputs, clinical data, charting, imaging, and digital dentistry workflows. This contract role pays $80 to $285 per hour and is open to qualified dentists in listed countries.
Posted Oct 19, 2026
Review sperm detection and motility labels in reconstructed microscopy videos for an AI-assisted semen analyzer. This contractor role pays $6-$14 per hour and requires at least two years of hands-on semen analysis experience.
Posted Oct 19, 2026
Use clinical dentistry and digital dentistry experience to evaluate dental cases, imaging, treatment plans, and AI-generated content. The remote contract role pays $80 to $285 per hour and requires an active dental license.
Posted Oct 19, 2026
Run structured aerodynamic workflows in Flow5 v7 using supplied geometry and project files. This remote contractor role pays per task and involves precise analyses, file delivery, and documentation.
Posted Oct 18, 2026
Review financial documents, valuation models, deal scenarios, and AI-generated content using your investment banking expertise. This remote contract role pays $120 to $150 per hour, with applications starting through OpenTrain.
Posted Oct 17, 2026
Create complex computational life sciences tasks that test AI agents through scientific analysis, coding, and reproducible evaluation. This remote contractor assignment pays $300 per approved task.
Posted Oct 17, 2026
Create difficult web research benchmarks for AI models by verifying obscure facts, writing precise prompts and answer keys, and analyzing model failures. This part-time contract role requires 20+ hours weekly and strong English research skills.
Posted Oct 17, 2026
Review stylized 3D assets, textures, and model outputs against clear project guidelines for an eight-week remote AI training project paying $7 per hour. Apply with your portfolio through OpenTrain.
Posted Oct 17, 2026
Review short audio and video clips, compare two options, and select the best cross-modal match. This entry-level contract project requires English, headphones, careful judgment, and 20+ hours each week.
Posted Oct 17, 2026
Review AI-generated nutrition content and label food, dietary, and nutrient data for accuracy, safety, and relevance. This entry-level contract role is open worldwide and requires 20 or more hours per week.
Posted Oct 17, 2026
Annotate food and dietary data, evaluate AI-generated nutrition content, and check scientific accuracy for nutrition tracking, coaching, and research applications. This flexible, eight-week remote assignment requires 20+ hours weekly and English proficiency.
Posted Oct 17, 2026
Create rigorous biomedical signal processing and machine learning problems, develop reference solutions, and validate reproducible methods. This part-time contract pays $60 to $120 per hour equivalent, paid per task that meets the project specifications.
Posted Oct 17, 2026
Create, review, and validate coding-heavy machine-learning tasks involving models, training systems, inference, and performance optimization. Pay is $60 to $120 per hour equivalent, paid per task that meets project specifications, with about 15 flexible hours per week.
Posted Oct 16, 2026
Solve coding, debugging, and technical reasoning challenges used to evaluate AI models. This flexible remote contractor role expects about 15 hours per week and pays $60 to $120 per hour equivalent, paid per task that meets project specifications.
Posted Oct 16, 2026
Use mechanical engineering, simulation, Python, and coding-agent skills to create and review tasks for AI training. This remote contractor role offers flexible scheduling of about 15 hours per week and pays $60 to $120 per hour equivalent, paid per task.
Posted Oct 16, 2026
Create, solve, and validate aerodynamics and computational fluid dynamics tasks for AI training. This remote role offers approximately 15 hours per week and pays $80 to $120 per hour equivalent, paid per task that meets the project specifications.
Posted Oct 16, 2026
Create, solve, and evaluate hardware engineering problems for AI training. This remote contractor role pays $60 to $120 per hour equivalent, paid per task that meets the project specifications, for about 15 hours per week.
Posted Oct 16, 2026
Use deep STEM expertise and Python to solve technical problems and evaluate AI-generated answers. This remote contractor role offers $60 to $120 per hour equivalent, paid per task that meets the project specifications, with about 15 flexible hours each week.
Posted Oct 16, 2026
Lead a team reviewing realistic engineering tasks for AI training, including simulations, numerical methods, and automated tests. This remote contractor assignment lasts about four weeks, requires 20+ hours weekly, and has no listed pay rate.
Posted Oct 16, 2026
Build and evaluate AI training datasets around mechanical design, simulation, testing, and failure analysis. This remote contract is planned for eight weeks and requires advanced engineering experience.
Posted Oct 16, 2026
Review complex biology problems and AI-generated answers, assess evidence and methods, and document clear scientific judgments. This contract, part-time role requires advanced life sciences expertise and 20+ hours each week.
Posted Oct 16, 2026
Create realistic social scenarios, review English AI responses, and explain your ratings in clear written feedback. This remote project runs about 2 to 3 weeks, requires at least 20 hours per week, and pays per task.
Posted Oct 16, 2026
Use chemistry or computational chemistry expertise to evaluate AI problems, workflows, data, and reasoning. This contractor role pays $45 to $90 per hour and is open in selected countries.
Posted Oct 16, 2026
Review biological workflows, datasets, and analysis methods used to benchmark AI systems. This contract, part-time role pays $45 to $90 per hour and requires deep biology or bioinformatics expertise.
Posted Oct 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.
