Freelance Senior Data Annotator

1 semana atrás

São Paulo, São Paulo, Brasil Toloka Annotators Tempo inteiro R$18.000 - R$36.000 por ano

Please submit your resume in English and indicate your level of English.

What we do

The Toloka Annotators platform connects individuals with Generative AI projects from leading tech innovators. Our mission is to unlock the full potential of AI by involving real people from around the world in the development process.

About the Role

Annotation is what helps AI make sense of the world — it's the bridge between raw data and intelligent understanding. As a Senior Data Annotator, you'll play a key role in shaping how AI systems interpret language, images, and information. You'll collaborate with cross-functional teams, provide feedback on data quality, and help maintain high annotation standards across diverse projects.

Responsibilities:

  • Review and analyze data — from text passages and product descriptions to social media posts, news articles, or visual content (such as marketing images and short videos) — ensuring it's correctly labeled and contextually accurate.
  • Perform quality assurance (QA) checks on tasks completed by other annotators, identifying inconsistencies or labelling errors, and providing constructive feedback to help improve accuracy.
  • Label or classify content according to detailed project guidelines — for example, tagging sentiment in user reviews, identifying medical terminology in clinical texts, or categorizing tone in marketing copy.
  • Evaluate AI-generated content by rating response quality, factual correctness, and tone appropriateness — such as comparing different chatbot outputs or fact-checking generated summaries.
  • Flag problematic or sensitive material, including biased language, misleading claims, or inappropriate visual content, to ensure compliance with ethical and safety standards.
  • Contribute to process improvements, such as suggesting refinements to annotation guidelines, improving workflow efficiency, and mentoring new team members on best practices.

Important note: This is project-based work. Tasks are available only when projects are active. You may be invited to one or more projects depending on your profile and current opportunities.

Requirements

  • You hold or are currently pursuing a Bachelor/Master/PhD Degree in any professional field.
  • You have advanced proficiency in Korean (C1) and at least English (B2), both written and spoken.
  • Experience in mentoring/teaching/consulting, or editing/reviewing/consulting work in a professional or academic setting.
  • Excellent written communication and ability to give clear, structured and constructive feedback
  • Proven experience in annotation or data labelling.
  • Attention to details and ability to understand and follow instructions.
  • Genuine interest in technology and artificial intelligence.

Benefits

Why this freelance opportunity might be a great fit for you?

  • Get paid for your expertise, with rates that can go up to $9/hour depending on your skills, experience, and project needs.
  • Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
  • Work on advanced AI projects and gain valuable experience that enhances your portfolio.
  • Influence how future AI models understand and communicate in your field of expertise.

  • Data Annotator for AI Models

    Há 6 dias

    São Paulo, São Paulo, Brasil RWS TrainAI Tempo inteiro R$30.000 - R$45.000 por ano

    Location: Remote working in Brazil Work Schedule: Full-time, Monday to Friday, 9 AM to 5 PM, PST (Pacific Standard Time) or GMT/IST (Ireland) - To be confirmed Experience: Previous experience in data annotation or content review is a plus Education: Bachelor's degree required Contract duration: Until June Compensation: 11 USD/hour Does this sound like you?...

  • Data Annotator for AI Models

    Há 6 dias

    São Paulo, São Paulo, Brasil RWS Group Tempo inteiro R$28.800 - R$57.600 por ano

    Location: Remote working in BrazilWork Schedule: Full-time, Monday to Friday, 9 AM to 5 PM, PST (Pacific Standard Time) or GMT/IST (Ireland) - To be confirmed.Experience: Previous experience in data annotation or content review is a plusEducation: Bachelor's degree requiredContract duration: Until June 2026.Compensation: 11 USD/hourDoes this sound like...

  • Data Annotator for AI Models

    Há 6 dias

    São Paulo, São Paulo, Brasil RWS Group Tempo inteiro R$15.000 - R$25.000 por ano

    Location: Remote working in BrazilWork Schedule: Full-time, Monday to Friday, 9 AM to 5 PM, PST (Pacific Standard Time) or GMT/IST (Ireland) - To be confirmed.Experience: Previous experience in data annotation or content review is a plusEducation: Bachelor's degree requiredContract duration: Until June 2026.Compensation: 11 USD/hourDoes this sound like...

  • Freelance Annotation Quality Reviewer

    1 semana atrás

    São Paulo, São Paulo, Brasil Toloka Annotators Tempo inteiro R$24.000 - R$72.000 por ano

    The Toloka Annotators platform connects individuals with Generative AI projects from leading tech innovators. Our mission is to unlock the full potential of AI by involving real people from around the world in the development process.About the RoleAnnotation is what helps AI make sense of the world — it's the bridge between raw data and intelligent...

  • Freelance Infrastructure Reporter

    1 semana atrás

    São Paulo, São Paulo, Brasil Acuris Tempo inteiro R$40.000 - R$80.000 por ano

    DescriptionInfraLatinAmerica, an online publication that covers private infrastructure investments in Latin America, is seeking bilingual freelance reporters in Sao Paulo.Candidates are required to write clear and crisp copy in English and have a background in breaking business news. Experience covering project finance, infrastructure funds and M&A is...

  • Senior Procurement

    Há 2 dias

    São Paulo, São Paulo, Brasil NTT DATA Tempo inteiro

    Make an impact with NTT DATAJoin a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it's a place where you can grow, belong and thrive.A NTT DATA Inc. é uma empresa...

  • Senior Data Analyst

    Há 4 horas

    São Paulo, São Paulo, Brasil GeorgiaTEK Systems Inc. Tempo inteiro R$80.000 - R$120.000 por ano

    Senior Data AnalystWe are seeking a Senior Data Analyst with strong expertise in statistics and data quality. This role is critical to ensuring the integrity and reliability of data used in analytical models and business decision-making. Key Responsibilities• Validate and certify data across all stages: raw sources, variables, and analytical models•...

  • Senior Java Developer

    Há 6 dias

    São Paulo, São Paulo, Brasil Grupo Data Tempo inteiro R$100.000 - R$120.000 por ano

    Hi We are Group DATA and we are searching for the best talent Our goal is to simplify our clients' lives with innovative IT solutions. We operate at global scale and we are expanding to PortugalIf you are passionate and have the desire to make the difference, we want to get to know you Join us to be part of this incredible adventureDescription:We are looking...

  • Senior Java Developer

    Há 2 horas

    São Paulo, São Paulo, Brasil Grupo Data Tempo inteiro €60.000 - €80.000 por ano

    Hi We are Group DATA and we are searching for the best talent Our goal is to simplify our clients' lives with innovative IT solutions. We operate at global scale and we are expanding to Portugal If you are passionate and have the desire to make the difference, we want to get to know you Join us to be part of this incredible adventure Description: We are...

  • Senior Data Engineer

    Há 2 dias

    São Paulo, São Paulo, Brasil Nearform Tempo inteiro R$90.000 - R$120.000 por ano

    This is acontract full-timeremote position for those based inBrazil. The initial contract is for6 months,with strong potential for extension.About UsNearform is an independent team of engineers, designers, data experts and strategists who build intelligent digital solutions and capability at pace. We create software solutions that enhance digital...