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.
Play modern AAA games while capturing, organizing, and annotating gameplay data for AI training. This worldwide, part-time contract role pays $10-$15 per hour and requires 20+ hours weekly.
Posted Jul 24, 2026
Use Revit and Navisworks to review BIM coordination materials, identify construction clashes, and document clear technical resolutions for AI model evaluation. This worldwide, part-time contractor role requires 20+ hours weekly.
Posted Jul 24, 2026
Help prepare computer vision data by outlining qualifying objects in images with polygon segmentation. This entry-level, worldwide contract offers less than 20 hours per week at $4-$6 per hour, with more work possible after a successful trial.
Posted Jul 22, 2026
Build reproducible reinforcement learning environments that test how AI systems solve real-world coding problems. This remote contractor role offers flexible work of about 15 hours per week at $50 to $100 per hour.
Posted Jul 22, 2026
Use senior cloud infrastructure expertise to evaluate AI systems, build reinforcement learning environments, and provide precise technical feedback. This remote contractor role pays $60-$130/hour.
Posted Jul 22, 2026
Evaluate AI model responses for safety, factual accuracy, policy compliance, and alignment across high-risk topics. This remote expert contract pays $60-$70 per hour and requires 20+ hours per week.
Posted Jul 22, 2026
Review medicinal chemistry data, structures, reactions, and drug discovery content to improve AI training datasets. This worldwide, part-time contract offers 20+ hours per week at $60-$80 per hour.
Posted Jul 21, 2026
Use advanced neuroscience expertise to evaluate research, write clear explanations, and improve AI training materials. This remote contractor role offers flexible part-time work at $60 to $80 per hour.
Posted Jul 21, 2026
Use your biochemistry expertise to evaluate datasets, research, protocols, prompts, and AI-generated answers. This worldwide contract role offers 20+ hours per week at $60-$80 per hour.
Posted Jul 21, 2026
Use your molecular biology expertise to create scientific training data, evaluate AI-generated content, and improve model performance. This remote contractor role offers 20+ hours per week at $60-$80 per hour.
Posted Jul 21, 2026
Use advanced pharmacology expertise to evaluate AI responses, create training datasets, and improve model accuracy. This worldwide, part-time contract offers $60-$80 per hour for 20+ hours weekly.
Posted Jul 21, 2026
Manage the workflows, KPIs, reporting, and quality processes behind AI training data. This remote contractor role offers 20+ hours per week and pays $40 to $60 per hour.
Posted Jul 21, 2026
Use advanced immunology expertise to evaluate AI-generated content, review datasets, and improve scientific accuracy. This worldwide contract role offers $60 to $80 per hour and 20+ hours weekly.
Posted Jul 21, 2026
Build realistic cloud infrastructure scenarios, reproducible environments, validation tests, and reference solutions that help train next-generation AI systems. This flexible remote contractor role pays $40-$100 per hour and requests 20+ hours weekly.
Posted Jul 21, 2026
Develop reproducible reinforcement learning environments that test complex software engineering workflows, create golden solutions, and contribute to open-source code. This worldwide contract role offers $50 to $150 per hour and requires 20+ hours weekly.
Posted Jul 20, 2026
Use your commercial contracting expertise to build negotiation playbooks, improve legal templates, and provide feedback that supports AI training. This worldwide contractor role offers $90 to $130 per hour and requires 20+ hours weekly.
Posted Jul 18, 2026
Evaluate Gemini personalization through creative multi-turn prompts, detailed response analysis, and side-by-side rankings. This remote contractor role offers flexible hours worldwide for skilled English writers and analytical thinkers.
Posted Jul 17, 2026
Use your commercial contracts and M&A diligence experience to review agreements, assess legal risk, and train AI systems used by transaction teams. This worldwide contractor role offers 20+ hours per week at $90-$100 per hour.
Posted Jul 17, 2026
Use your M&A, corporate, or securities expertise to evaluate deal scenarios, due diligence materials, and AI-generated legal analysis. This remote contract role offers 20+ hours per week at $80 to $100 per hour.
Posted Jul 17, 2026
Use your commercial contract expertise to draft MSAs, leases, IP licenses, and other agreements that help train next-generation AI systems. This remote, part-time contractor role pays $80 to $100 per hour.
Posted Jul 17, 2026
Use your senior commercial contracts expertise to create and evaluate negotiation playbooks for AI training. This flexible remote contractor role offers approximately 20 hours per week at $100-$200 per hour.
Posted Jul 17, 2026
Challenge frontier AI systems with adversarial prompts, uncover safety weaknesses, and document model behavior across high-risk topics. This expert contractor role pays $70 to $84 per hour for 20+ hours weekly.
Posted Jul 17, 2026
Review AI-generated Go code, validate backend solutions, and resolve difficult software issues for next-generation dialogue agents. This flexible worldwide contract role requires 20+ hours per week.
Posted Jul 17, 2026
Help advance large language models by designing challenging physics problems, writing rigorous solutions, and shaping evaluation benchmarks. This expert-level remote contract offers 20+ hours per week for graduate-level STEM specialists.
Posted Jul 17, 2026
Evaluate how AI personalizes conversations in Hindi by designing multi-turn prompts, ranking responses, and writing evidence-based rationales. This remote contractor role pays $15 per hour and requires 20+ hours weekly.
Posted Jul 16, 2026
Evaluate how conversational AI uses personal context in Chinese, comparing responses, checking grounding, and writing evidence-based feedback. This remote three-month contractor role pays $15 per hour and requires at least 20 hours weekly.
Posted Jul 16, 2026
Design Arabic multi-turn prompts and evaluate how naturally and accurately AI uses personal context. Join a remote, three-month contractor engagement paying $15 per hour through OpenTrain.
Posted Jul 16, 2026
Evaluate how conversational AI uses personal context in Portuguese, rank responses, and explain quality issues. This remote contractor role pays $15/hour and requires 20+ hours per week.
Posted Jul 16, 2026
Evaluate finance-focused AI models, identify failure modes, and create benchmarks for tasks such as deal analysis and M&A assessment. This worldwide contractor role offers flexible work under 20 hours per week at $100 per hour.
Posted Jul 16, 2026
Use strong Python skills to create coding data, evaluate language-model responses, and improve AI training workflows. This fully remote, one-month contractor assignment offers 20, 30, or 40 hours per week.
Posted Jul 16, 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.
