data annotation

Type: Short-Term Contract Location: Remote Commitment: Part-time (20-40 hours/week) Engagement Length: 1-2 weeks Start Date: Immediate Role Responsibilities Record high-quality Portuguese (Brazil) voice samples for AI training projects Deliver voice recordings with clear speech, natural emotion, and accurate pacing Interpret scripts and adapt performances...

Application Security Analyst (AI Training) About The Role You know how software actually breaks in production. You can tell the difference between a theoretical vulnerability and a genuine exploit path. Now, put that instinct to work on one of the most impactful problems in tech: teaching AI to think like a security expert. At Alignerr, we partner with...

Document AI/IDP Specialist (Remote - Latam) Be among the first 25 applicants. This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Document AI/IDP Specialist in Latin America. In this role, you will leverage AI and intelligent document processing technologies to transform unstructured documents into structured,...

Job Type: Contract, Part-time Location: Remote Role Description In this hourly, remote contractor role, you will work as a Copywriting & Content Subject Matter Expert (SME) to review AI-generated marketing/content-writing outputs and/or create expert copy and content, evaluating reasoning quality, intent alignment, and step-by-step writing decisions while...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Georgian Language Specialist - Freelance AI Trainer Project based in Brazil. This role offers the opportunity to apply your Georgian language expertise to the development of next-generation artificial intelligence systems.You...

As a Senior C Engineer, you will work remotely on an hourly paid basis to review AI-generated C code, low-level systems designs, and technical explanations, as well as generate high-quality reference implementations and step-by-step reasoning for complex engineering problems. You will assess solutions for accuracy, clarity, safety, and adherence to the...

Brazilian Portuguese Audio Transcriptionist (AI Training) About the Role What if your sharp ear for spoken Brazilian Portuguese could directly shape how AI understands and processes one of the world's most widely spoken languages? We're looking for detail-oriented transcriptionists based in and around São Paulo to produce accurate, high-quality...

Lean 4 Proof Engineer — Mathematical Formalization About The Role What if your deep mathematical expertise could directly shape how AI understands and reasons about formal proofs? We're looking for mathematicians and formal verification specialists to translate advanced mathematical arguments into machine-verifiable Lean 4 proofs — working at the...

DescriptionDefined.ai is a leading provider of high-quality, ethically sourced data for Artificial Intelligence (AI) and Machine Learning (ML) model training. We host the world's largest AI marketplace and offer end-to-end services to help companies accelerate their AI solutions. Backed by significant funding and recognized globally for our commitment to...

About the ProjectWe are looking for native or near-native speakers to support an AI data annotation and translation project. The role involves reviewing, translating, and annotating content according to detailed guidelines to help improve the quality and accuracy of AI systems.Project DetailsWork Type: Freelance / RemoteCommitment: Approx. 20 hours per...

Chemistry Specialist (Masters/PhDs) - AI Training About The Role What if your deep knowledge of chemistry could directly shape how AI reasons through some of the most complex scientific problems in the world? We're looking for Chemistry Specialists — Masters and PhD level — to help train cutting-edge AI models by designing, solving, and evaluating...

Role: AI Model Evaluator - Brazilian Portuguese Role Type : Contract ----2 Months | 8 hours/day | 5 days/week Role Location- Brazil (Remote) Candidate must be flexible from Monday to Sunday (with option with 2 days off) Flexible Hours: EST Overlap but 2 months of dedicated project Job description: We are looking for native/near-native Brazilian...

This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency. At Mindrift, innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI. What...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a German Translator - Freelance AI Trainer Project based in Brazil. This freelance opportunity is ideal for a German translator who wants to apply language expertise to the development of next-generation AI systems.You will...

About The Role We're looking for economists with public policy experience to help shape how AI understands, reasons about, and communicates complex economic and policy topics. Your expertise will directly influence the quality and rigor of AI systems being developed by leading research labs — making a real-world impact from the comfort of your own...

AI Pilot Operations Associate (Freelance) 4 days ago. Be among the first 25 applicants. This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency. At Mindrift, innovation meets opportunity. We believe...

We are looking for Speech AI Evaluation Specialist to support the improvement of AI-generated content in Portuguese (Brazil). Job Type: Freelance Location: Brazil (work from home) Work Schedule: Part-time - 10+ hours per week. Flexible - work whenever you want. Start Date: Immediately Duration: TBC Rate: 6 USD per hour Help Shape the Future of AI Are...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Market Curation Editor (Sports) based in Brazil. This role sits at the intersection of sports expertise, editorial judgment, and product data operations for a social-predictions platform. You will serve as the human quality layer...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Graphic Designer Specialist - Freelance AI Trainer Project based in Brazil. This freelance opportunity is designed for an experienced graphic designer who wants to help shape the next generation of AI-powered creative tools. You...

Nursing Informatics Specialist (AI Training) About The Role Your clinical expertise is more valuable than ever — and not just at the bedside. We're looking for Registered Nurses and clinical informatics professionals to help train and evaluate AI systems designed for healthcare settings. Your real-world knowledge of nursing workflows, EHR systems, and...