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 your software QA expertise and paid human-data evaluation experience to assess AI outputs, design tests, and document defects remotely for $90-$175 per hour.
Posted Sep 9, 2026
Review business datasets and sensitive documents that support AI training, identify quality and privacy issues, and deliver clear recommendations. This worldwide remote contractor role offers 20+ hours per week at $31-$60 per hour.
Posted Sep 9, 2026
Use hands-on CRM and sales operations expertise to evaluate AI-generated workflows, automation logic, and model responses. This worldwide, part-time contract offers 20+ hours per week at $28 to $92 per hour.
Posted Sep 9, 2026
Use professional QA expertise to evaluate AI-generated technical responses, design edge-case tests, and document defects with precision. This remote contractor role offers $90-$175 per hour and requires 20+ hours weekly.
Posted Sep 9, 2026
Use your accounting and ERP expertise to evaluate AI-generated financial work, correct errors, and improve model performance. This remote contractor role pays $90-$170 per hour and requires 20+ hours weekly.
Posted Sep 9, 2026
Use professional creative experience to evaluate AI-generated design and media, provide expert feedback, and shape next-generation creative tools. This remote contractor role pays $30-$100 per hour and requires paid AI-training experience.
Posted Sep 9, 2026
Use your CRM and sales operations expertise to evaluate AI-generated workflows, annotate business data, and improve next-generation models. Remote contractor openings pay $28 to $92 per hour.
Posted Sep 9, 2026
Review and improve realistic data-center MEP engineering tasks, grading criteria, and technical documents as a remote contractor earning $100-$140 per hour.
Posted Sep 9, 2026
Apply your data-center and mission-critical engineering expertise to review AI training tasks, technical documents, rubrics, and quality checks. This worldwide, part-time contract role pays $100-$140 per hour.
Posted Sep 9, 2026
Use your data center or complex capital-project experience to review AI training tasks, technical documents, schedules, and acceptance criteria. This worldwide, part-time contract offers flexible work at $80-$130 per hour.
Posted Sep 9, 2026
Help shape reliable healthcare research by designing and reviewing physician and patient surveys across therapeutic areas. This remote contract pays $140 per hour with a stated 40-hour weekly commitment.
Posted Sep 9, 2026
Evaluate AI-generated designs and media using professional creative workflows in a remote contract role expected to last 3 to 6 months. Earn $30-$100 per hour while helping improve cutting-edge AI systems.
Posted Sep 9, 2026
Use advanced research expertise to create challenging, evidence-based questions that evaluate how AI models reason and synthesize information. This remote contractor role pays $40-$90 per hour and requires 20+ hours weekly.
Posted Sep 8, 2026
Use advanced humanities expertise to create, test, and refine challenging questions for AI systems. This remote, flexible contractor role offers task-based work paying $40-$90 per hour with a minimum commitment of 20 hours weekly.
Posted Sep 8, 2026
Help train next-generation AI by reviewing and annotating videos of robotic arms performing assigned tasks. This remote contractor engagement pays $50 to $90 per hour and is expected to last 1 to 3 months.
Posted Sep 8, 2026
Join a remote, 3-to-6-month contractor project evaluating and improving AI models across diverse topics. Earn $50 to $90 per hour while using critical thinking, precise communication, and strong attention to detail.
Posted Sep 8, 2026
Use ServiceNow workflow expertise, JSON, SQL, and prompt engineering to help train and evaluate AI systems. This remote contractor role offers 20, 30, or 40 hours per week.
Posted Sep 8, 2026
Use CFD, aerodynamics, Python, and scientific computing expertise to create and review engineering tasks that help train AI. This fully remote contractor role offers flexible work of approximately 15 hours per week.
Posted Sep 8, 2026
Apply your physics research expertise to rigorous AI training work, creating reproducible derivations and analyses for advanced scientific problems. This worldwide remote contractor role offers flexible work at $100-$200 per hour.
Posted Sep 8, 2026
Use advanced physics expertise to evaluate and improve AI systems through research-driven work in statistical physics, quantum information, and condensed matter theory. This fully remote contractor role offers flexible part-time hours and $100-$200 per hour.
Posted Sep 8, 2026
Help train AI on mechanical engineering design, simulation, and technical problem-solving using Python and programmatic engineering tools. Work remotely as a contractor for about 15 hours per week at $80 to $130 per hour.
Posted Sep 8, 2026
Use circuit-design expertise to create, solve, and validate AI training tasks across analog, digital, power, mixed-signal, and RF systems. This fully remote contractor role offers flexible work of about 15 hours per week at $80-$130 per hour.
Posted Sep 7, 2026
Use Python and computational materials simulations to create, solve, and evaluate scientific AI-training tasks. This fully remote contractor role offers flexible work of about 15 hours per week at $80 to $130 per hour.
Posted Sep 7, 2026
Help train advanced AI models by building coding test environments, creating reference solutions, and evaluating software engineering work. This remote contractor role offers approximately 15 hours per week and an ideal rate of $50-$100 per hour.
Posted Sep 7, 2026
Build reproducible reinforcement learning environments and reference solutions for challenging software engineering tasks. Use your coding, debugging, and performance optimization expertise on flexible, remote AI training work.
Posted Sep 7, 2026
Use your Mandarin and English listening skills to create accurate audio transcripts that help train next-generation AI. This remote contractor role offers 20+ hours per week at $20-$30 per hour.
Posted Sep 7, 2026
Transcribe and annotate Cantonese and English audio remotely for $20-$35 per hour, working 20+ hours weekly. Use your Cantonese expertise to improve AI training data and deliver accurate, time-stamped transcripts.
Posted Sep 7, 2026
Use mechanical engineering, simulation, and Python expertise to create, solve, and validate tasks for AI training. Work remotely for about 15 hours per week at $80 to $130 per hour.
Posted Sep 7, 2026
Use your computational fluid dynamics expertise to evaluate AI-generated engineering responses, troubleshoot simulations, and improve next-generation AI systems. This remote contractor role offers output-based compensation of $50 to $150 USD per hour.
Posted Sep 7, 2026
Transcribe Dutch and English audio to help improve next-generation AI systems. This remote, part-time contractor role pays $25-$30 per hour and requires 20+ hours per week.
Posted Sep 7, 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.
