Looking for remote AI training or data labeling work open to applicants located in Portugal? OpenTrain is the hiring organization for these roles. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Each live posting determines eligibility and provides the responsibilities, qualifications, hours, location rules, pay, and other details for that role.
Use professional biology or environmental science expertise to evaluate AI-generated documents, spreadsheets, and slide decks. This remote contractor role offers flexible work at $80-$120 per hour.
Posted Jul 10, 2026
Use your operations, inventory, or capacity-planning expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote contract offers 20+ hours per week at $80-$120 per hour.
Posted Jul 10, 2026
Evaluate AI-generated government documents, spreadsheets, and presentations for accuracy, rigor, and presentation quality. Use your public administration expertise in flexible, remote AI training work paying $80 to $120 per hour.
Posted Jul 10, 2026
Use 5+ years of process improvement or SOP expertise to evaluate AI-generated documents, spreadsheets, and presentations. Work remotely worldwide for $80-$120 per hour with 20+ hours available weekly.
Posted Jul 10, 2026
Review AI-generated public health documents, spreadsheets, and slide decks for factual accuracy, rigor, and presentation quality. Work remotely for $80-$120 per hour with a flexible commitment of 20 or more hours each week.
Posted Jul 10, 2026
Use your intellectual property, trademark, and copyright expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote, part-time contract pays $80-$120 per hour and offers 20+ hours weekly through OpenTrain.
Posted Jul 10, 2026
Use your sales and go-to-market expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote freelance role pays $80-$120 per hour and requires 20+ hours weekly.
Posted Jul 10, 2026
Review AI-generated healthcare documents, spreadsheets, and presentations for factual accuracy, clinical rigor, and presentation quality. This remote contractor role pays $80 to $120 per hour and requires at least five years of healthcare or clinical experience.
Posted Jul 10, 2026
Use your product management expertise to evaluate AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, and professional quality. This remote hourly contract pays $80 to $120 per hour.
Posted Jul 10, 2026
Review AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, and presentation quality. Earn $80-$120 per hour in a flexible, remote contractor role with OpenTrain.
Posted Jul 10, 2026
Use professional music production and critical listening skills to evaluate Russian and English AI-generated songs, lyrics, and vocals. This remote contract pays $35-$49 per hour for flexible work of around 20 hours weekly.
Posted Jul 10, 2026
Use your user and customer research expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote contractor role offers flexible work at $80-$120 per hour through OpenTrain.
Posted Jul 10, 2026
Lead quality assurance for Portuguese AI training projects, reviewing localized content, guiding contributors, and improving QA workflows at $35 per hour. This flexible, remote contractor role requires 20+ hours weekly.
Posted Jul 9, 2026
Review and improve Portuguese AI responses for accuracy, reasoning, localization, and clarity in a fully remote contractor role based in Brazil. Work 20+ hours weekly at $30 per hour through OpenTrain.
Posted Jul 9, 2026
Review and improve AI-generated English responses, write expert feedback, and test guided speech conversations. This remote contractor role pays $20-$25 per hour and requires 20+ hours weekly.
Posted Jul 8, 2026
Use your accounting expertise to evaluate AI-generated answers, create gold-standard examples, and improve model reasoning across journal entries, reconciliations, and financial reporting. Remote contract work offers 20+ hours per week.
Posted Jul 8, 2026
Use your legal expertise to evaluate AI-generated answers, check reasoning and citations, and create high-quality legal analyses, memos, and model responses. This remote contractor role offers 20+ hours weekly at $40-$120 per hour.
Posted Jul 8, 2026
Build and improve machine learning models remotely as a contractor using Python, MongoDB, major ML frameworks, and large datasets. Earn $80-$140 per hour while contributing to practical AI training workflows.
Posted Jul 3, 2026
Annotate approximately 60 engineering diagram sheets as graph data, labeling classified symbols, routing nodes, bounding boxes, and connections. A paid pilot comes first, with a fixed project price of $499.
Posted Jun 30, 2026
Join a remote, part-time project annotating humanoid-robot videos for vision-language-action models. Bring prior VLA annotation experience, Level B capability, and familiarity with Encord or another labeling platform.
Posted Jun 27, 2026
Use your UI/UX expertise in a worldwide contract opportunity focused on user-centered product design, design systems, and usability. The $100 fixed-price engagement includes an AI interview assessing your design judgment and experience.
Posted Jun 15, 2026
Review and correct AI-generated extractions from legal, financial, accounting, and compliance documents. Use JSON schemas and careful document analysis in a flexible, worldwide contract role paying $8 to $11.20 per hour.
Posted May 14, 2026
Use your pathology expertise to evaluate super-resolution algorithms by comparing whole-slide images and rating image quality. This remote, part-time contractor role pays $100-$200 per hour and requires a licensed pathologist.
Posted May 12, 2026
Help build a multimodal benchmark of African cultural content by validating images, refining captions, and adding cultural context. Work flexibly on a browser-based platform for less than 20 hours per week.
Posted Apr 28, 2026
Use your accounting or finance expertise to review financial documents, correct OCR, and structure tables and key-value data for AI training. This worldwide contractor role pays $7-$9 per hour and requires 20+ hours weekly.
Posted Apr 27, 2026
Record scripted Dutch dialogue from a professional or prosumer setup and help improve AI voice systems. This remote contract offers flexible scheduling, clear audio standards, and a listed rate of $83 to $150 per hour.
Posted Apr 23, 2026
Rate image quality metrics and assess image quality tools in a remote AI training project. This worldwide contractor role offers flexible part-time work at $5 to $7 per hour.
Posted Apr 15, 2026
Record clear, natural scripted audio in English and one or more supported languages using professional equipment. This worldwide, part-time contractor role offers $40 to $60 per hour and 20+ hours of weekly work.
Posted Apr 10, 2026
Review and improve auto-generated annotations across an 8,000-frame refinery dataset using CVAT. This worldwide, part-time contractor project offers a fixed $1,200 payment and requires 20+ hours per week.
Posted Apr 5, 2026
Use Python and advanced computer science expertise to design problems, validate AI-generated solutions, and score multi-step reasoning. This project-based contractor role offers global remote work at $15-$40 per hour.
Posted Apr 5, 2026
AI training work involves preparing and reviewing examples used by artificial-intelligence systems. Roles open to applicants located in Portugal can involve annotating images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. The individual live posting explains which responsibilities and requirements apply.
OpenTrain is the hiring organization for roles open to applicants located in Portugal. Candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Refer to each individual live posting for every other role-specific detail.
