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 advanced biology expertise to evaluate prompts, scenarios, explanations, and AI outputs. This worldwide, part-time contract role pays $80 to $90 per hour and requires less than 20 hours weekly.
Posted Jul 15, 2026
Use your doctoral physics expertise to help train AI models through technical content creation, problem solving, and scientific output evaluation. This worldwide, remote contract role offers flexible work under 20 hours per week at $80 to $90 per hour.
Posted Jul 15, 2026
Use your PhD-level mathematics expertise to write and evaluate precise answers for advanced AI training prompts. This worldwide, part-time contract offers $80-$90 per hour and 20+ hours weekly.
Posted Jul 15, 2026
Use advanced statistical expertise to write, review, and evaluate content that helps AI systems improve. This flexible remote contractor role pays $90-$120/hour and is open worldwide.
Posted Jul 15, 2026
Use advanced chemistry expertise to evaluate AI responses, create authoritative benchmark answers, and improve model quality. This flexible remote contract pays $80 to $90 per hour.
Posted Jul 15, 2026
Create graduate-level mechanical engineering questions, rationales, and AI-material reviews for a flexible, worldwide contractor role paying $60-$130 per hour. Work 20+ hours weekly with OpenTrain.
Posted Jul 14, 2026
Use your advanced electrical engineering and teaching expertise to write graduate-level questions, build rubrics, and evaluate AI-generated technical content. This worldwide contract role offers flexible work under 20 hours per week at $40-$130 per hour.
Posted Jul 14, 2026
Evaluate AI-generated BI dashboards and performance reporting artifacts against expert quality standards in a remote, flexible contract paying $80 to $120 per hour.
Posted Jul 13, 2026
Use your program management expertise to evaluate AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, and presentation quality. This remote contract offers 20+ hours per week at $80-$120 per hour.
Posted Jul 13, 2026
Use 5+ years of marketing or advertising experience to create rubrics and evaluate AI-generated and human work, including campaigns, brand strategy, copy, and presentations. Remote contractor work pays $80-$150 per hour.
Posted Jul 13, 2026
Help train computer vision systems by annotating robotic surgery videos with segmentation, bounding boxes, keypoints, and object tracking. This fully remote contract role pays $15 to $32 per hour and requires 20+ hours weekly.
Posted Jul 12, 2026
Evaluate AI-generated documents, spreadsheets, and presentations for brand, creative, and marketing quality. This remote contractor role offers $80-$120 per hour and requires 20+ hours weekly.
Posted Jul 10, 2026
Record natural, expressive French voice samples for a next-generation text-to-speech system in an approximately four-hour session paying $50-$100 per hour. A follow-up session may be available.
Posted Jul 10, 2026
Use your humanities, arts, or culture expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote contractor role pays $80-$120 per hour and requires 20 or more hours weekly.
Posted Jul 10, 2026
Review AI-generated business documents, spreadsheets, and presentations for factual accuracy, analytical rigor, and visual quality. Work remotely for $80-$120 per hour with a flexible 20+ hour weekly commitment.
Posted Jul 10, 2026
Use your personal finance expertise to evaluate AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, and presentation quality. This remote freelance role pays $80-$120 per hour.
Posted Jul 10, 2026
Use your FP&A and corporate finance expertise to evaluate AI-generated documents, spreadsheets, and presentations for accuracy, rigor, and business quality. This worldwide contract role offers 20+ hours per week at $80-$120 per hour.
Posted Jul 10, 2026
Review AI-generated documents, spreadsheets, and presentations for cybersecurity and IT GRC quality, accuracy, and clarity. Work remotely for $80-$120 per hour with a flexible 20+ hour weekly engagement.
Posted Jul 10, 2026
Record expressive Castilian Spanish speech for text-to-speech training and evaluation. This flexible contract role offers 5 to 10 hours per week and pays $50 to $100 per hour.
Posted Jul 10, 2026
Review AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, visual quality, and presentation effectiveness. This worldwide contract role offers 20+ hours per week and pays $80-$120 per hour through OpenTrain.
Posted Jul 10, 2026
Use your product launch and experiment readiness expertise to evaluate AI-generated documents, spreadsheets, and slide decks. Review accuracy, rigor, visual quality, and presentation effectiveness remotely for $80-$120 per hour.
Posted Jul 10, 2026
Evaluate AI-generated documents, spreadsheets, and presentations against privacy and regulatory compliance standards. This remote contractor role offers 20+ hours per week and pays $80-$120 per hour.
Posted Jul 10, 2026
Use your legal contracts, diligence, and redline expertise to evaluate AI-generated documents, spreadsheets, and slide decks. This remote contractor role offers 20+ hours per week and pays $80-$120 per hour.
Posted Jul 10, 2026
Use your finance or accounting expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote contractor role pays $80-$120 per hour and requires 20+ hours weekly.
Posted Jul 10, 2026
Use your education expertise to evaluate AI-generated documents, spreadsheets, and slide decks for accuracy, rigor, aesthetics, and presentation. Work worldwide on a flexible, part-time contract at $80-$120 per hour.
Posted Jul 10, 2026
Use your people operations or recruiting expertise to evaluate AI-generated documents, spreadsheets, and slide decks. This remote contractor role offers $80-$120 per hour and requires 20+ hours weekly.
Posted Jul 10, 2026
Review AI-generated clinical, biomedical, and pharmaceutical documents, spreadsheets, and presentations for accuracy and rigor. Work remotely for $80-$120 per hour with a flexible 20+ hour weekly engagement through OpenTrain.
Posted Jul 10, 2026
Use professional biology or environmental science expertise to evaluate AI-generated documents, spreadsheets, and slide decks. This remote contractor role offers flexible work at $80-$120 per hour.
Posted Jul 10, 2026
Use your operations, inventory, or capacity-planning expertise to evaluate AI-generated documents, spreadsheets, and presentations. This remote contract offers 20+ hours per week at $80-$120 per hour.
Posted Jul 10, 2026
Evaluate AI-generated government documents, spreadsheets, and presentations for accuracy, rigor, and presentation quality. Use your public administration expertise in flexible, remote AI training work paying $80 to $120 per hour.
Posted Jul 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.
