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 private equity expertise to create realistic deal tasks, stress-test LBO models, write investment committee memos, and evaluate AI-generated financial analysis. This remote contract role pays $45 to $100 per hour.
Posted Aug 27, 2026
Evaluate AI-generated responses for accuracy, depth, and logical quality while creating expert prompts and reference answers. This worldwide, part-time contractor role offers $245 to $280 per hour for PhD-level expertise.
Posted Aug 27, 2026
Use your finance and investment experience to evaluate AI-generated models, valuation analyses, and market reasoning. This flexible contractor role pays $245-$280 per hour and requires 20+ hours weekly.
Posted Aug 27, 2026
Use management consulting expertise to evaluate AI reasoning, write high-quality prompts and model answers, and improve business strategy models. This remote contractor role offers 20+ hours per week at $245-$280 per hour.
Posted Aug 27, 2026
Evaluate and improve AI-generated writing against professional newsroom standards. This remote contractor role offers experienced journalists, editors, and writers 20+ hours per week at $245 to $280 per hour.
Posted Aug 27, 2026
Help improve AI with accurate Tamil audio transcription and linguistic review. Work remotely for 20+ hours per week on flexible contract assignments paying $10 to $24 per hour.
Posted Aug 27, 2026
Work remotely as a Telugu Transcription Expert for 20+ hours per week, transcribing and annotating audio, video, and text to improve AI systems. Earn $10-$24 per hour while applying your language expertise to meaningful AI training work.
Posted Aug 27, 2026
Transcribe German audio and help improve next-generation language AI from anywhere. This contractor role offers 20+ hours per week and pays $10-$25 per hour based on experience.
Posted Aug 27, 2026
Use your PhD-level chemistry expertise to create and evaluate challenging scientific computing tasks for frontier AI models. This remote, six-week contract pays $70 per hour for 20 or more hours weekly.
Posted Aug 27, 2026
Create rigorous, executable AI evaluation tasks grounded in scientific computing, mathematics, and programming. This remote contract role pays $70 per hour and requires 20+ hours weekly.
Posted Aug 27, 2026
Review AI-generated financial research and trading analysis against relevant market information, rate response quality, and provide clear feedback in a flexible, remote contract role.
Posted Aug 26, 2026
Use advanced design judgment to annotate editorial, poster, marketing, and short video assets for AI training. Work remotely for $20-$50 per hour with a flexible 20+ hour weekly commitment.
Posted Aug 26, 2026
Use advanced ear training, musical notation expertise, and Python audio analysis to transcribe polyphonic SATB recordings into accurate MusicXML. This flexible remote contractor role offers approximately 15 hours per week at $50 to $100 per hour.
Posted Aug 26, 2026
Help improve multilingual AI by quality-checking Spanish audio, transcriptions, timestamps, speaker labels, and metadata. This fully remote, 15-week contractor project requires native LATAM Spanish and at least 40 hours per week.
Posted Aug 26, 2026
Use advanced 3D/CGI editing, animation, motion graphics, and visual effects to create polished video assets for robotics and educational AI training. This remote contractor role offers $30-$80 per hour and flexible work of 20+ hours weekly.
Posted Aug 25, 2026
Evaluate AI agents on realistic software engineering tasks and build reliable MCP-based reinforcement learning environments. This flexible remote contractor role offers an ideal rate range of $60 to $120 per hour.
Posted Aug 25, 2026
Use your software engineering expertise to build MCP-powered reinforcement learning environments that test how AI agents solve real-world coding problems. This flexible contractor role pays $60 to $120 per hour.
Posted Aug 25, 2026
Use psychiatry or clinical psychology expertise to review and improve AI content for military personnel and veterans. This remote contract role offers 20+ hours per week and pays $100 to $200 per hour.
Posted Aug 25, 2026
Use a PhD in child development or developmental psychology to review datasets and evaluate AI outputs for accuracy, cultural appropriateness, and developmental relevance. Remote contractor work offers 20+ hours per week at $100-$300 per hour.
Posted Aug 25, 2026
Create challenging AI evaluation tasks focused on semiconductor materials and molecular modeling. Use scientific judgment, programming, and rubric design in a flexible, worldwide contract role paying $70 per hour.
Posted Aug 23, 2026
Join a short-term research project manually segmenting structural cracks in high-resolution UAV bridge images. Use your civil or infrastructure inspection experience to create precise, independent reference annotations.
Posted Aug 23, 2026
Use your DevOps expertise to design infrastructure tasks, write reference solutions, and evaluate AI-generated code. This worldwide contract offers $50-$100 per hour and 20+ hours of flexible work each week.
Posted Aug 22, 2026
Use your technology transactions expertise to redline contracts, assess AI-generated legal responses, and build evaluation standards for legal AI systems. This remote contractor role offers flexible part-time work at an advertised $90-$150 per hour.
Posted Aug 22, 2026
Use your US corporate law expertise to evaluate legal documents, deal structures, and litigation materials that help train advanced AI systems. This remote contract role offers flexible work at $140-$400 per hour.
Posted Aug 21, 2026
Use your litigation and transactional expertise to review legal documents, draft clauses, and evaluate scenarios that improve AI-generated legal content. This remote contractor role pays $140-$400 per hour and requires US bar admission.
Posted Aug 21, 2026
Use your US legal expertise to analyze, draft, review, and evaluate sophisticated legal materials that help improve AI systems. This remote contractor role offers 20+ hours per week and $140-$400 per hour.
Posted Aug 21, 2026
Apply your U.S. immigration law expertise to evaluate AI-generated legal content, research, and workflows remotely. This contractor role pays $140 to $400 per hour and requires an active law license and significant BigLaw experience.
Posted Aug 21, 2026
Use your family law expertise to review, analyze, and annotate complex legal documents for AI training. This remote contractor role offers flexible part-time work at $140 to $400 per hour.
Posted Aug 21, 2026
Use your M&A legal expertise to review transaction documents, evaluate AI responses, and improve legal training data remotely for $140-$400/hour. Prior AI training experience is not required.
Posted Aug 21, 2026
Create challenging, research-driven questions and evaluate AI model answers using citations, clear reasoning, and detailed quality standards. This worldwide remote contractor role offers flexible part-time work paying $20 to $60 per hour.
Posted Aug 21, 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.
