Looking for remote AI training or data labeling work open to applicants located in Spain? OpenTrain is the hiring organization for roles on OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Eligibility and requirements can vary by individual posting.
Create rigorous sociology assessments, aligned rubrics, and actionable feedback for an AI training project. This flexible worldwide contract offers 20+ hours per week at $50-$90 per hour.
Posted Aug 12, 2026
Use your civil engineering expertise to author evaluation tasks, technical documents, complex problems, and rubrics for AI models. This worldwide contractor role offers flexible work at $50-$100 per hour.
Posted Aug 12, 2026
Use your technical B2B sales expertise to evaluate AI model outputs, review professional documents, and provide clear feedback. This remote contractor role offers flexible part-time work at $45-$85 per hour.
Posted Aug 12, 2026
Use your mechanical engineering technology expertise to create technician workflow tasks, technical datasets, and grading rubrics for advanced AI benchmarks. This remote contractor role pays $30 to $70 per hour and requires less than 20 hours weekly.
Posted Aug 12, 2026
Use your contract drafting, review, and risk assessment experience to evaluate legal documents and improve AI systems. This remote contractor role pays $80–$180 per hour.
Posted Aug 12, 2026
Use your mechanical design expertise to create CAD models, interpret technical drawings, and help train advanced AI systems. This remote contractor role offers flexible work under 20 hours per week at $55-$100 per hour.
Posted Aug 12, 2026
Use advanced biostatistical expertise to create rigorous AI evaluation tasks covering clinical trials, regulatory reviews, and observational studies. Contract work pays $60-$100 per hour for 20+ hours weekly.
Posted Aug 12, 2026
Apply your securities and commodities expertise to create realistic evaluation tasks, market scenarios, and compliance-focused rubrics for frontier AI systems. This remote contractor role pays $30 to $80 per hour for approved work.
Posted Aug 12, 2026
Use your supply chain expertise to help train next-generation AI systems through ERP workflows, demand forecasting, supplier scorecards, and inventory analysis. This remote freelance role offers 20+ hours per week and pays $55 to $100 per hour.
Posted Aug 12, 2026
Use professional emergency communications experience to evaluate and improve AI systems for high-stakes coordination. Work remotely as a contractor for 20+ hours weekly at $30 to $55 per hour.
Posted Aug 12, 2026
Use professional ambulance dispatch expertise to evaluate emergency communications AI training data and simulations. This worldwide, part-time contractor role offers 20+ hours per week and pays $30-$55 per hour.
Posted Aug 12, 2026
Use your management consulting expertise to help train and evaluate AI on business problem briefs and data sets. Work remotely in English for 10-15 hours per week at $60-$120 per hour.
Posted Aug 12, 2026
Apply your advanced statistical expertise to clean, analyze, visualize, and annotate complex datasets used to train next-generation AI systems. This flexible worldwide contract offers less than 20 hours per week and pays $60-$120 per hour.
Posted Aug 12, 2026
Create expert-level benchmark tasks that test AI agents on data entry, validation, reconciliation, and record accuracy. Work remotely for $20 to $35 per hour with flexible part-time hours.
Posted Aug 12, 2026
Help improve legal AI through contract redlining, simulated negotiations, and expert evaluation of AI-generated responses. This part-time remote contractor role offers $80-$200 per hour for attorneys with technology-transactions experience.
Posted Aug 12, 2026
Use your Tier 2/3 IT support expertise to create troubleshooting examples and evaluate AI training content remotely. This flexible contractor role pays $30 to $55 per hour.
Posted Aug 12, 2026
Use your statistical and data visualization expertise to create rigorous benchmark questions, answers, and explanations for advanced AI evaluation. Work remotely as a contractor for 20 or more hours per week at $25 to $50 per hour.
Posted Aug 11, 2026
Create rigorous chart-based reasoning and evaluation tasks that help advanced AI systems understand financial markets and operational performance. This remote contractor role pays $25-$50 per hour and requires 20+ hours weekly.
Posted Aug 11, 2026
Use your technology transactions experience to negotiate simulated contracts, review AI-generated legal responses, and shape evaluation standards. This remote, part-time contractor role pays $100-$200 per hour and requires 20+ hours weekly.
Posted Aug 11, 2026
Use advanced CUDA, C++, GLSL, and WebGPU skills to optimize GPU kernels and evaluate performance across modern architectures. This remote contractor role offers $60-$100 per hour and 20+ hours per week.
Posted Aug 11, 2026
Use your technology transactions expertise to evaluate AI-generated contract responses, simulate negotiations, and build legal evaluation standards. This part-time remote contractor role pays $100-$200 per hour and requires 20+ hours weekly.
Posted Aug 11, 2026
Use your chart analysis and quantitative reasoning skills to create clear questions, answers, and explanations that help train AI systems. This remote contractor role offers flexible scheduling, 20+ hours per week, and $25-$50 per hour.
Posted Aug 11, 2026
Create rigorous AI training data from Kaplan-Meier curves, forest plots, ROC curves, and other medical visualizations. This remote contractor role offers $25-$50 per hour and requires clear clinical and biostatistical reasoning.
Posted Aug 11, 2026
Use deep engineering expertise to author rigorous technical problems and evaluate AI-generated responses. This remote contractor role offers flexible, output-based work for professionals with advanced engineering knowledge.
Posted Aug 11, 2026
Use your sports expertise to evaluate AI-generated answers, create challenging prompts, and build benchmark datasets for an eight-week remote contractor assignment with OpenTrain.
Posted Aug 11, 2026
Use senior FP&A expertise to create financial planning, forecasting, modeling, and business analysis evaluations for AI systems. This remote contractor role offers $80–$90 per hour.
Posted Aug 11, 2026
Use your complex litigation and trial experience to build scenarios, reference pleadings, and evaluation rubrics for AI systems. This worldwide, part-time contract role pays $90-$100 per hour and requires 20+ hours weekly.
Posted Aug 11, 2026
Use five or more years of corporate-law experience to build sophisticated AI evaluation tasks covering M&A, governance, securities, contracts, and restructuring. Work worldwide as a contractor for $90-$100 per hour with a 20+ hour weekly commitment.
Posted Aug 11, 2026
Review AI-generated plain-English translations of US tax laws, statutes, and IRS regulations as a qualified accountant or tax professional. Apply your expertise to complex legal logic, terminology, exceptions, and edge cases in remote AI training work.
Posted Aug 11, 2026
Use your music expertise to evaluate and improve AI-generated responses across theory, composition, history, production, and contemporary music. This remote eight-week contractor assignment includes prompt design, benchmark development, and evidence-based review.
Posted Aug 10, 2026
AI training is human work that helps prepare and review examples used by artificial-intelligence systems. Depending on the role, tasks may include labeling images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. Roles open to applicants located in Spain can differ in their responsibilities, so inspect each live posting for the exact work involved.
OpenTrain is the hiring organization for roles on OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. The individual live posting is the source of truth for eligibility, qualifications, responsibilities, hours, pay, and other role-specific requirements.
