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.
Use deep strategy consulting expertise to create, evaluate, and refine complex business scenarios that help AI reason through strategic problems. This remote freelance engagement lasts up to 9 weeks and requires at least 4 hours daily.
Posted Aug 21, 2026
Use senior finance and advisory judgment to create evaluation tasks, validate models, and set quality standards for AI-generated outputs. This worldwide contractor engagement offers 20+ hours per week for up to 10 weeks.
Posted Aug 21, 2026
Use vocal control, emotional range, and precise pacing to create expressive English (US) performances for AI training projects. This part-time contractor role offers 20+ hours per week for experienced voice actors with quality recording equipment.
Posted Aug 21, 2026
Use your technology-transactions experience to evaluate AI-generated contract responses, conduct redlining exercises, and improve legal AI performance. This part-time remote contractor role offers flexible scheduling and hourly pay.
Posted Aug 21, 2026
Use your M&A legal expertise to evaluate contract redlines, assess AI-generated legal responses, and improve models used for contract review. This part-time remote contractor role pays $90-$150 per hour.
Posted Aug 21, 2026
Help improve legal AI through simulated negotiations, redlining, and expert evaluation of fund and M&A contract scenarios. This remote, part-time contractor role pays $90 to $150 per hour.
Posted Aug 21, 2026
Use expert Java and Spring Boot skills to build scalable microservices supporting next-generation AI training work. This remote, part-time contractor role offers $60-$110 per hour.
Posted Aug 20, 2026
Use your 3D animation and CGI expertise to evaluate video and model outputs for AI training. This flexible remote contractor role offers about 20 hours per week and pays $15-$80 per hour.
Posted Aug 20, 2026
Use Avid Media Composer and professional post-production judgment to label, segment, and curate video data for AI training. This remote contractor role offers $15 to $80 per hour and requires 20 or more hours weekly.
Posted Aug 20, 2026
Use Adobe Premiere Pro and After Effects to annotate video data, create motion graphics, and improve AI training datasets in a flexible remote contractor role paying $15 to $80 per hour.
Posted Aug 20, 2026
Use DaVinci Resolve, editing expertise, and color-grading judgment to label and evaluate video for AI training. This remote contractor role offers $15-$80 per hour and 20+ hours per week.
Posted Aug 20, 2026
Use Final Cut Pro and macOS workflows to segment footage, mark keyframes, and prepare accurate video datasets for AI training. This remote contractor role welcomes entry-level to mid-level video editors and pays $15 to $80 per hour.
Posted Aug 20, 2026
Review transformed documents and datasets to verify accurate PII redaction and anonymization. This remote, part-time contractor role offers $31-$60 per hour for professionals with privacy, legal review, compliance, or eDiscovery experience.
Posted Aug 19, 2026
Use your technology transactions experience to evaluate AI contract analysis, perform simulated negotiations, and improve legal reasoning systems. This remote, part-time contractor role pays $90-$200 per hour.
Posted Aug 19, 2026
Apply political science and public policy expertise to create rigorous AI evaluation tasks, develop gold-standard answers, and review model-training content. This worldwide contractor role offers flexible part-time work for 20+ hours per week.
Posted Aug 19, 2026
Create and solve research-grade computational mathematics problems that train and evaluate advanced AI models. This fully remote, three-month freelance assignment offers 20, 30, or 40 hours per week.
Posted Aug 19, 2026
Use your expertise in fine arts, visual culture, and art history to write challenging prompts and evaluate AI-generated responses. This worldwide, part-time contract role offers 20+ hours per week in cutting-edge AI evaluation.
Posted Aug 19, 2026
Help train advanced AI systems by creating and evaluating expert-level financial tasks involving valuation, investment research, modeling, forecasting, and risk assessment. This contract requires 20+ hours per week and PST overlap.
Posted Aug 19, 2026
Use 8 to 15 years of strategy or management consulting experience to create, evaluate, and refine complex scenarios that train AI in strategic reasoning. Work remotely as a flexible contractor for 20+ hours weekly.
Posted Aug 19, 2026
Use your marketing expertise to create and evaluate strategic tasks that improve AI-generated recommendations. This remote, part-time contractor role offers 20+ hours weekly for English-speaking marketing professionals worldwide.
Posted Aug 19, 2026
Use public interest legal expertise to create realistic AI evaluation tasks, legal briefs, and judgment-based rubrics across civil rights, environmental, and advocacy contexts. This worldwide contract role pays $90-$100 per hour for 20+ hours weekly.
Posted Aug 19, 2026
Use your intellectual property expertise to create realistic patent, licensing, trademark, copyright, and enforcement evaluations for AI systems. This remote contract role pays $90-$100 per hour and requires at least five years of professional IP experience.
Posted Aug 19, 2026
Create and verify rigorous engineering multiple-choice questions for AI benchmarks across fields such as VLSI, control science, mechatronics, and biotechnology. Earn $61-$77 per hour in fully remote, asynchronous work.
Posted Aug 19, 2026
Use current hospital-based expertise to review FHIR data, clinical notes, and claims for AI training. This remote contractor role offers hospitalist physicians 20+ hours per week at $70-$100 per hour.
Posted Aug 19, 2026
Use your hospitalist expertise to review inpatient cases, assess documentation and care quality, and explain complex clinical decisions for AI training. This remote contractor role offers $70-$100 per hour and requires 20+ hours weekly.
Posted Aug 19, 2026
Create and validate precise parametric FreeCAD models that help train AI systems, using mechanical design, GD&T, and engineering judgment. This remote contractor role offers 20+ hours per week at $40 to $100 per hour.
Posted Aug 19, 2026
Use advanced mechanical CAD and manufacturing expertise to create, edit, and review parametric models for AI training data. This remote contractor role offers 20+ hours per week and pays $40 to $100 per hour.
Posted Aug 19, 2026
Use advanced parametric CAD, GD&T, and design-for-manufacturability expertise to create, revise, and audit mechanical models for an AI training project. This worldwide contractor role offers 20+ hours per week and pays $30 to $100 per hour.
Posted Aug 19, 2026
Use advanced parametric CAD and manufacturing expertise to create, review, and improve mechanical model training data for AI. This worldwide contractor role offers 20+ hours per week and pays $40-$100 per hour.
Posted Aug 19, 2026
Use advanced FreeCAD and mechanical engineering expertise to review parametric models, assemblies, and technical drawings that help train AI systems. This remote contractor role offers flexible part-time work at $40-$100 per hour.
Posted Aug 19, 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.
