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 immunology expertise to evaluate AI-generated content, review datasets, and improve scientific accuracy. This worldwide contract role offers $60 to $80 per hour and 20+ hours weekly.
Posted Jul 21, 2026
Build realistic cloud infrastructure scenarios, reproducible environments, validation tests, and reference solutions that help train next-generation AI systems. This flexible remote contractor role pays $40-$100 per hour and requests 20+ hours weekly.
Posted Jul 21, 2026
Develop reproducible reinforcement learning environments that test complex software engineering workflows, create golden solutions, and contribute to open-source code. This worldwide contract role offers $50 to $150 per hour and requires 20+ hours weekly.
Posted Jul 20, 2026
Create expressive Korean voice recordings for AI training projects from a professional home studio or in-studio setting. Bring scripts and characters to life while building a specialized AI training portfolio through flexible freelance work.
Posted Jul 20, 2026
Evaluate Polish-language AI conversations, compare personalized responses, and write detailed quality rationales in a remote one-month contract paying $20 per hour.
Posted Jul 20, 2026
Evaluate advanced mathematics problems, model solutions, computational tasks, and formal proofs to improve language models. Work remotely as a contractor for at least 20 hours per week using Python and Lean.
Posted Jul 20, 2026
Use your commercial contracting expertise to build negotiation playbooks, improve legal templates, and provide feedback that supports AI training. This worldwide contractor role offers $90 to $130 per hour and requires 20+ hours weekly.
Posted Jul 18, 2026
Review Catalan AI training content, guide QA teams, and improve language quality at $36/hour for 20+ hours weekly. Apply through OpenTrain to help shape how AI understands Catalan.
Posted Jul 17, 2026
Review and improve AI-generated Catalan content, create reference answers, and provide detailed feedback as a remote contractor earning $25/hour. Work 20+ hours weekly from France or Spain.
Posted Jul 17, 2026
Evaluate Gemini personalization through creative multi-turn prompts, detailed response analysis, and side-by-side rankings. This remote contractor role offers flexible hours worldwide for skilled English writers and analytical thinkers.
Posted Jul 17, 2026
Evaluate AI-generated C and C++ code for correctness, efficiency, reliability, and maintainability while helping improve dialogue agents and LLM systems. This flexible contract role requires 20+ hours per week.
Posted Jul 17, 2026
Use your commercial contracts and M&A diligence experience to review agreements, assess legal risk, and train AI systems used by transaction teams. This worldwide contractor role offers 20+ hours per week at $90-$100 per hour.
Posted Jul 17, 2026
Use your M&A, corporate, or securities expertise to evaluate deal scenarios, due diligence materials, and AI-generated legal analysis. This remote contract role offers 20+ hours per week at $80 to $100 per hour.
Posted Jul 17, 2026
Use your commercial contract expertise to draft MSAs, leases, IP licenses, and other agreements that help train next-generation AI systems. This remote, part-time contractor role pays $80 to $100 per hour.
Posted Jul 17, 2026
Use your senior commercial contracts expertise to create and evaluate negotiation playbooks for AI training. This flexible remote contractor role offers approximately 20 hours per week at $100-$200 per hour.
Posted Jul 17, 2026
Challenge frontier AI systems with adversarial prompts, uncover safety weaknesses, and document model behavior across high-risk topics. This expert contractor role pays $70 to $84 per hour for 20+ hours weekly.
Posted Jul 17, 2026
Evaluate how AI chatbots handle realistic Japanese small-business situations, from customer interactions to financial planning. Create prompts, compare responses, and deliver structured feedback in a flexible 16-week freelance project.
Posted Jul 17, 2026
Evaluate and compare AI chatbot responses for realistic Korean small-business scenarios in a flexible 10-week project. Use your business knowledge to create prompts, assess output quality, and provide structured feedback.
Posted Jul 17, 2026
Use your voice acting skills to record expressive Spanish (Latam) characters, stories, and varied content for AI training. Work flexibly as a remote freelance voice actor with 20+ hours per week available.
Posted Jul 17, 2026
Record expressive French voice-overs for creative and AI-related projects, bringing scripts, characters, and stories to life with professional audio quality. Work remotely or from a studio for 20+ hours per week.
Posted Jul 17, 2026
Use your Arabic voice acting skills to record expressive, character-driven audio for AI training projects. Work remotely as a flexible freelancer for 20+ hours per week while building your OpenTrain portfolio.
Posted Jul 17, 2026
Record expressive Japanese voice-overs that help train modern AI systems. This flexible freelance opportunity offers 20+ hours per week for experienced voice actors with professional recording capabilities.
Posted Jul 17, 2026
Help improve Malay and English large language models through research, analytical question answering, reasoning tasks, and detailed feedback. This remote contractor role offers flexible work of 20+ hours per week.
Posted Jul 17, 2026
Help improve multilingual language models by analyzing Turkish content, validating research, and creating clear reasoning scenarios and feedback. This flexible, remote contractor role is open to entry-level applicants fluent in Turkish and English.
Posted Jul 17, 2026
Help improve large language models with Swedish and English analysis, claim validation, reasoning tasks, summaries, and detailed feedback. This remote contractor role offers 20+ hours per week for analytical thinkers.
Posted Jul 17, 2026
Help improve large language models by evaluating Danish and English content, researching claims, solving reasoning problems, and writing detailed feedback. This flexible remote contractor assignment requires 20+ hours per week.
Posted Jul 17, 2026
Help improve large language models by evaluating Korean-English analytical content, researching claims, solving reasoning problems, and writing detailed feedback. This remote, entry-level contractor role offers 20+ hours per week.
Posted Jul 17, 2026
Help improve large language models by analyzing Japanese and English content, researching claims, solving logic problems, and writing precise feedback. This remote, entry-level contractor role offers 20+ hours per week.
Posted Jul 17, 2026
Use your English and Dutch fluency to evaluate language models through research, reasoning, question answering, and detailed feedback. This remote, part-time contractor role offers 20+ hours per week in the fast-growing field of AI training.
Posted Jul 17, 2026
Review AI-generated Go code, validate backend solutions, and resolve difficult software issues for next-generation dialogue agents. This flexible worldwide contract role requires 20+ hours per week.
Posted Jul 17, 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.
