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.
Record high-quality Tamil speech for AI training using professional audio equipment. This worldwide, part-time contract role offers 20+ hours per week and pays $10-$30 USD per hour.
Posted Jul 30, 2026
Create high-quality scripted and unscripted Telugu recordings that help train next-generation language AI. This remote contractor role offers 20+ hours per week and pays $10 to $30 per hour.
Posted Jul 30, 2026
Test conversational AI models and agents for jailbreaks, prompt injections, bias exploitation, and other safety risks. This expert-level remote contract pays $48 to $62 per hour for 20+ hours weekly.
Posted Jul 30, 2026
Join OpenTrain as a Finnish and English AI safety red team expert testing conversational models for jailbreaks, prompt injections, bias exploitation, and other systemic risks. This remote contract pays $48 to $62 per hour.
Posted Jul 30, 2026
Probe conversational AI for jailbreaks, prompt injections, bias exploitation, and manipulation as an expert red team contractor. Work worldwide for $48 to $62 per hour, 20+ hours weekly, using English and Danish.
Posted Jul 30, 2026
Use expert adversarial testing to expose jailbreaks, prompt injections, bias, misinformation, and harmful behaviors in conversational AI. This remote contractor role offers $24-$35 per hour and about 40 hours per week.
Posted Jul 30, 2026
Help improve conversational AI by uncovering jailbreaks, prompt injections, bias risks, and other vulnerabilities. This remote contractor role offers 20+ hours per week at $29-$45 per hour for native English and Portuguese speakers.
Posted Jul 30, 2026
Probe conversational AI models and agents for vulnerabilities using adversarial testing, jailbreaks, prompt injections, and multi-turn manipulation. This remote, part-time expert contract pays $17 to $25 per hour.
Posted Jul 30, 2026
Help improve conversational AI by uncovering jailbreaks, prompt injections, bias exploitation, and multi-turn manipulation. This remote contract role offers $17-$25 per hour for English and Vietnamese speakers.
Posted Jul 30, 2026
Test conversational AI for jailbreaks, prompt injections, bias, misuse, and multi-turn manipulation. This expert contract role offers 20+ hours weekly at $48-$62 per hour for native English and Dutch speakers.
Posted Jul 30, 2026
Probe conversational AI with jailbreaks, prompt injections, and bias tests while documenting vulnerabilities and systemic risks. This remote expert contract requires native English and Malay fluency and offers $17 to $25 per hour.
Posted Jul 30, 2026
Review browser-based tests for AI-generated web applications and determine whether their workflows, fixtures, and assertions produce reliable results. Work remotely for 20+ hours per week at $30-$60 per hour.
Posted Jul 29, 2026
Build and optimize GPU software for LLM training tasks using CUDA, WebGPU, GLSL, and C++. This expert-level contractor role offers worldwide remote work at $60 to $85 per hour for 20+ hours weekly.
Posted Jul 29, 2026
Evaluate AI-generated and human-created data science work remotely at $100 to $150 per hour. Create grading criteria, assess complex deliverables, and provide evidence-based feedback through a flexible contractor role.
Posted Jul 29, 2026
Use your management consulting expertise to evaluate AI-generated and human-created consulting deliverables, develop grading criteria, and provide evidence-based feedback. This worldwide contract role offers 20+ hours per week at $100 to $150 per hour.
Posted Jul 29, 2026
Use senior civil engineering judgment to create realistic AI evaluation tasks, calculations, technical narratives, and rubrics for infrastructure and construction workflows. This worldwide freelance role pays $70-$80 per hour and requires 20+ hours weekly.
Posted Jul 29, 2026
Use senior electrical engineering judgment to create and evaluate demanding AI tasks across power systems, circuit design, embedded systems, and certification. This remote contract offers 20+ hours per week at $70-$80 per hour.
Posted Jul 29, 2026
Create realistic evaluation tasks that test AI systems on enterprise mechanical engineering, product design, manufacturing, and certification. This remote contract pays $70-$80 per hour and welcomes experts in ASME or ISO standards.
Posted Jul 29, 2026
Use advanced Excel, PowerPoint, and Word skills to evaluate AI-generated business documents, compare outputs, and provide feedback that improves next-generation AI. This remote contract offers 20+ hours per week at $20-$60 per hour.
Posted Jul 29, 2026
Use your microbiology expertise to evaluate and improve next-generation AI systems. This remote contractor role offers $70-$90 per hour, flexible part-time work, and 20+ hours weekly.
Posted Jul 29, 2026
Use your materials science expertise to review technical content, evaluate AI-generated answers, and create high-quality training data. This remote contract role offers 20+ hours per week and pays $80-$130 per hour.
Posted Jul 29, 2026
Use your aerodynamics and computational fluid dynamics expertise to review technical content, refine AI training materials, and translate complex engineering results into actionable knowledge. This worldwide contract role offers 20+ hours per week at $80-$130 per hour.
Posted Jul 29, 2026
Help train next-generation AI by reviewing, editing, formatting, and extracting information from complex Word and PDF documents. This remote, part-time contractor role offers $20-$55 per hour and requires 20+ hours weekly.
Posted Jul 29, 2026
Create realistic PowerPoint, Excel, and Word business tasks, collaborate with an LLM on Office Open XML files, and evaluate model-generated deliverables. This worldwide contract role offers 20+ hours per week and $20 to $60 per hour.
Posted Jul 29, 2026
Use computational biology and medicinal chemistry expertise to annotate biological datasets, evaluate scientific content, and improve next-generation AI systems. This remote contractor role offers 20+ hours per week at $90-$120 per hour.
Posted Jul 28, 2026
Use medicinal chemistry and bioinformatics expertise to curate drug discovery data, evaluate AI-generated scientific content, and improve model reliability. This remote contractor role offers $90 to $120 per hour for 20+ hours weekly.
Posted Jul 28, 2026
Use your physics research expertise to evaluate and improve advanced AI systems remotely. This part-time contractor role offers 20+ hours per week and pays $70-$90 per hour.
Posted Jul 28, 2026
Join OpenTrain as an Audio and Video Data Annotator working 20+ hours per week on detailed labeling, quality review, and annotation improvement. Earn $6-$8 per hour in a worldwide contractor role.
Posted Jul 28, 2026
Annotate and review video and audio samples for next-generation AI systems in a flexible remote contractor role paying $6-$10 per hour. Bring strong attention to detail and clear English communication.
Posted Jul 28, 2026
Review and annotate complex private equity, M&A, fund, banking, technology, and privacy documents to help train AI systems. This expert contractor role offers worldwide, part-time work at $90-$130 per hour.
Posted Jul 24, 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.
