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.
Assess AI coding agents through realistic software tasks, trajectory reviews, testing, and technical judgments. This remote, two-month contractor role requires eight hours daily and four-hour PST overlap.
Posted Aug 31, 2026
Evaluate Python coding agents by reviewing trajectories, tool use, code changes, execution results, and final outputs. This remote contractor role offers 20+ hours per week for experienced software engineers with AI or LLM expertise.
Posted Aug 30, 2026
Use Python and CAD tools to turn dimensioned engineering drawings into precise 3D solid models for AI training. This worldwide contract role offers flexible work under 20 hours per week at $50 to $100 per hour.
Posted Aug 30, 2026
Apply your electrical engineering expertise to evaluate designs, calculations, and power systems for AI training. This remote short-term contract pays $70-$85 per hour with a 40-hour weekly commitment.
Posted Aug 30, 2026
Use your RF and electromagnetic engineering expertise to evaluate complex technical problems for AI training. This remote contractor role offers 20+ hours per week at $80-$95 per hour.
Posted Aug 30, 2026
Lead recorded one-on-one Spanish tutoring sessions that help improve language-learning AI. This remote freelance project pays $60-$70 per hour and runs for approximately three weeks.
Posted Aug 30, 2026
Review action and hand-pose annotations in video datasets, identify quality issues, make precise corrections, and provide clear feedback. This entry-level contractor role offers worldwide, part-time work at $15-$20 per hour.
Posted Aug 29, 2026
Use your healthcare administration, clinical documentation, billing, or coding expertise to evaluate and improve next-generation AI systems remotely. Earn $150 to $287 per hour as a flexible contractor.
Posted Aug 29, 2026
Evaluate and refine AI-generated corporate presentations, documents, spreadsheets, and PDFs as a remote contractor working about 15 hours per week. Use sharp visual judgment and business context to create polished reference deliverables.
Posted Aug 29, 2026
Help train language-focused AI by participating in authentic, recorded Spanish learning sessions with experienced tutors. This flexible contractor role pays $30-$42 per hour and requires 20+ hours weekly.
Posted Aug 29, 2026
Use your backend engineering skills to build reproducible environments, solve software problems, and create reference solutions that help train AI models. This remote contract pays $60 to $120 per hour and is expected to run for 3 to 6 months.
Posted Aug 29, 2026
Create executable scientific computing problems that challenge frontier AI models, using your biology expertise and programming skills. This remote, six-week freelance engagement pays $70 per hour and requires at least 20 hours weekly.
Posted Aug 28, 2026
Use advanced physics and scientific programming to create executable research problems that test frontier AI models. This remote six-week contract pays $70 per hour for at least 20 hours weekly.
Posted Aug 28, 2026
Use your Norwegian music expertise to evaluate AI-generated lyrics and music for quality, originality, natural language, and prompt adherence. Work remotely for around 20 hours per week at $42-$78 per hour.
Posted Aug 28, 2026
Use your preclinical ADC or bispecific antibody expertise to annotate scientific data, evaluate AI outputs, and shape drug discovery models. This ongoing remote contract pays $60 to $100 per hour.
Posted Aug 28, 2026
Use your Brazilian Portuguese voice acting skills to record characters, stories, and varied content for AI projects. This flexible freelance role offers worldwide availability and requires 20+ hours per week.
Posted Aug 28, 2026
Help improve AI legal reasoning by reviewing model answers, testing contract interpretation, and identifying citation and jurisdictional errors. This remote contractor role offers $245-$280 per hour for qualified attorneys.
Posted Aug 27, 2026
Evaluate AI-generated code, inspect model reasoning, and create rigorous software-engineering challenges that improve advanced AI systems. This remote contractor role offers $245-$280 per hour and requires 20+ hours weekly.
Posted Aug 27, 2026
Apply real venture capital judgment to AI training data, from market sizing and founder evaluation to investment memos and financial scenarios. This remote contractor role offers flexible work at $45 to $100 per hour.
Posted Aug 27, 2026
Use your data science, statistics, and quantitative expertise to evaluate AI model reasoning, create expert prompts and reference solutions, and improve next-generation systems. This remote contractor role offers $245-$280 per hour and requires 20+ hours weekly.
Posted Aug 27, 2026
Use real investment banking expertise to create and evaluate AI training data covering valuation, deal analysis, financial models, and client-ready written work. This remote contractor role offers $45-$100 per hour for 20+ hours weekly.
Posted Aug 27, 2026
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
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.
