Find remote AI training and data labeling jobs open to applicants in Brazil.
Review sports-focused AI prompts and responses for accuracy, reasoning, completeness, and nuance. This remote eight-week contractor assignment requires 40 hours per week and strong sports knowledge.
Posted Aug 11, 2026
Evaluate AI-generated music responses for accuracy, reasoning, completeness, and nuance. This remote, eight-week contractor assignment requires 40 hours per week and four hours of Pacific Time overlap.
Posted Aug 10, 2026
Build Docker-based validation workflows for datasets, schemas, and model artifacts using Dockerfiles, Python or Bash, and CI/CD checks. This contractor role requires 20+ hours weekly and is open to candidates in selected countries.
Posted Aug 3, 2026
Help evaluate how AI systems handle real clinical problems by creating medical scenarios, testing clinical reasoning, and judging model performance. This remote freelance role requires an actively practicing licensed physician and offers flexible scheduling for 20+ hours per week.
Posted Aug 3, 2026
Improve prompts, policies, and AI responses across tools, APIs, and languages. This remote contractor assignment requires 20 or more hours weekly and is open to applicants in 10 countries.
Posted Aug 2, 2026
Evaluate chatbot responses in Spanish for small business scenarios, from customer interactions and marketing to operations and financial planning. This contractor project requires 20 or more hours each week.
Posted Aug 1, 2026
Help evaluate how AI systems handle real medical problems by creating clinical scenarios and assessment methods. This remote, flexible contract is for a currently practicing, licensed physician.
Posted Jul 25, 2026
Evaluate Russian-language AI conversations, test how models use personal context, and explain which responses are accurate, helpful, and natural. This remote contractor role pays $15 per hour for 20 or more hours per week.
Posted Jul 24, 2026
Record Korean scripts, characters, and stories for AI training projects using clear speech, emotional range, and professional audio. This flexible contractor role supports remote or studio work and requires 20 or more hours per week.
Posted Jul 20, 2026
Review Polish AI conversations, compare personalized responses, and explain what makes them helpful, natural, and accurate. This remote contractor role pays $20 per hour for 20 to 40 hours per week.
Posted Jul 20, 2026
Analyze content, validate claims, solve reasoning questions, and write feedback that helps improve language models. This remote contract role requires professional fluency in English and Bahasa Indonesian.
Posted Jul 20, 2026
Lead teams of 20 or more developers delivering supervised fine-tuning and RLHF work for language models. This part-time role requires English fluency, 20 or more hours per week, and substantial software engineering and management experience.
Posted Jul 20, 2026
Evaluate advanced mathematics problems and model-generated solutions, write corrections, and verify formal proofs in Lean. This remote contractor role offers 20, 30, or 40 hours per week.
Posted Jul 20, 2026
Assess how Gemini uses personal context in multi-turn conversations, then compare and explain model responses. This three-month contractor role requires English, at least 20 hours per week, and four hours of PST overlap.
Posted Jul 17, 2026
Analyze public datasets, interpret JSON data, and turn findings into clear technical documentation for AI research and data work. This remote contract requires 20 or more hours per week and strong English communication.
Posted Jul 17, 2026
Review and improve AI-generated C and C++ code, solve difficult programming problems, and help build backend components for language model training. This contract role requires 20 or more hours each week and strong English communication.
Posted Jul 17, 2026
Create, research, summarize, and review English content that helps language models produce clearer and more accurate text. This remote contractor role is open worldwide and requires 20+ hours per week.
Posted Jul 17, 2026
Evaluate how AI chatbots handle real Japanese small-business situations, from customer service and marketing to finance. This remote, flexible project runs for 16 weeks and requires 20+ hours per week.
Posted Jul 17, 2026
Evaluate AI chatbot responses using realistic Korean small business scenarios, documents, and conversations. This remote, flexible project runs for 10 weeks and requires 20 or more hours each week.
Posted Jul 17, 2026
Record natural Spanish (Latam) voices for AI training projects involving characters, stories, and varied subjects. Use your acting range, follow direction, and deliver polished audio from a professional studio.
Posted Jul 17, 2026
Record expressive French voice-overs for AI and creative projects from a professional home studio or recording studio. Use your voice acting skills to bring scripts, characters, and stories to life.
Posted Jul 17, 2026
Record expressive Arabic voice performances for AI training projects, including character and story-driven scripts. This remote freelance role requires prior voice acting experience, strong vocal control, and reliable recording equipment.
Posted Jul 17, 2026
Record expressive Japanese voice-overs for AI training projects from a professional home studio or in-studio setting. This flexible freelance role requires prior voice acting experience and 20+ hours per week.
Posted Jul 17, 2026
Review Tagalog and English content, answer analytical questions, research claims, and give detailed feedback that helps improve AI models. This remote contractor role requires 20+ hours per week and is open worldwide.
Posted Jul 17, 2026
Review Malay and English language model responses, validate claims, solve reasoning tasks, and write detailed feedback. This remote contractor role requires 20+ hours per week.
Posted Jul 17, 2026
Help improve language models through Hebrew and English research, summarization, reasoning questions, and detailed feedback. This remote contractor role requires 20+ hours weekly and accepts entry-level applicants with strong analytical skills.
Posted Jul 17, 2026
Analyze Turkish content, research claims, answer reasoning questions, and create clear feedback that helps improve language models. This remote contract role requires English and Turkish fluency and 20+ hours per week.
Posted Jul 17, 2026
Help improve language models by researching claims, solving reasoning tasks, summarizing content, and reviewing answers in English and Swedish. This remote contract requires at least 20 hours per week.
Posted Jul 17, 2026
Work remotely as a Danish-English LLM Data Analyst on research, text review, analytical questions, and structured feedback that helps improve language models. This freelance assignment requires 20+ hours per week.
Posted Jul 17, 2026
Evaluate Korean and English language model answers through research, logic problems, content analysis, and detailed feedback. This remote contract role requires at least 20 hours per week.
Posted Jul 17, 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.
