This facet lists remote AI-training and data-labeling roles that explicitly accept applicants located in Spain. The work supports machine-learning systems and can include tasks such as annotation, transcription, evaluation, or content review, but each live posting defines the exact duties and eligibility. OpenTrain is the hiring organization for roles presented on OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they support. Candidates apply through OpenTrain and should read each listing for full details.
Join OpenTrain as a remote Chemical Reasoning & Discovery Engineer creating chemistry-focused reasoning datasets and reproducible evaluation rubrics for LLMs. This 8-week, part-time contractor role (~20+ hrs/week) requires 4 hours overlap with PST and is ideal for experienced chemists.
Posted Jul 17, 2026
Join OpenTrain to evaluate and annotate AI-generated U.S. legal responses using structured rubrics; requires a J.D. and 3+ years of U.S. practice or teaching. Flexible part-time contract (10–30 hrs/week), ~1 month with possible extension.
Posted Jul 17, 2026
Join OpenTrain as a native Russian Audio QA Specialist to review multi-channel recordings, verbatim transcriptions, timestamps, and metadata for a multilingual audio evaluation dataset; 20+ hrs/week, contractor, remote, worldwide.
Posted Jul 17, 2026
Join OpenTrain as an Arabic Audio QA Specialist to perform final quality checks on multi-channel Arabic recordings and verified transcriptions, working 20+ hours/week remotely. Ideal for native Arabic speakers with a sharp ear for audio fidelity and word-level timestamp accuracy.
Posted Jul 17, 2026
Join OpenTrain to review multi-channel Korean audio, verbatim transcripts, timestamps, and diarization for high-accuracy multilingual AI evaluation data; native Korean required, 20+ hours/week, part-time contractor, fully remote.
Posted Jul 17, 2026
Join OpenTrain AI as a remote Japanese Audio Annotation QA Specialist to validate multi-channel conversational audio, verbatim transcripts, diarization, timestamps, metadata, and safety checks; requires native Japanese and 20+ hours/week availability.
Posted Jul 17, 2026
Evaluate AI chatbot responses for small-business scenarios in a 10-week, remote contract with flexible hours. Create prompts, compare multi-model outputs, and submit structured ratings and transcripts — entry-level, 20+ hrs/week, English.
Posted Jul 17, 2026
Join OpenTrain to evaluate AI chatbot responses for real small-business scenarios, creating prompts, running short conversations, and providing structured feedback that improves models. This 10-week, remote contract is entry-level and requires business knowledge and 20+ hours/week availability.
Posted Jul 17, 2026
Record Spanish (Latam) voice-overs for AI training projects on a flexible, remote contract basis (20+ hrs/week). Ideal for voice actors with a professional home studio, demo reel, and experience taking direction or doing dubbing/ADR.
Posted Jul 17, 2026
Record high-quality French voice-overs for AI speech and language training in a flexible, remote contractor role. Ideal for experienced voice actors with a professional home studio and availability for 20+ hours/week.
Posted Jul 17, 2026
OpenTrain AI is hiring an experienced Arabic voice actor to record high-quality, emotionally expressive voice-overs for characters and stories. This flexible, remote contract role expects 20+ hours/week, reliable delivery from a home or studio setup, and the ability to revise reads to direction.
Posted Jul 17, 2026
Flexible freelance role recording Japanese voice-overs for characters, dubbing, and localization; requires a demo reel, professional recording setup, and 20+ hours/week availability. Work remote or in-studio on varied AI training projects through OpenTrain.
Posted Jul 17, 2026
Work remotely as a Tagalog Analytical Content Reviewer helping fine-tune LLMs: analyze Tagalog text, create reasoning scenarios, and provide detailed annotations. Contract, 20+ hours/week with required overlap to US time zones.
Posted Jul 17, 2026
Join OpenTrain as a remote Malay Language AI Analyst to analyze and summarize complex text, research factual claims, and create Q&A scenarios that improve large language models. This contractor role requires fluency in Malay and English and strong analytical reasoning.
Posted Jul 17, 2026
Join OpenTrain AI as a Hebrew Language AI Analyst to improve large language models by summarizing texts, validating claims, and creating reasoning examples. Remote, contractor role for bilingual Hebrew/English contributors offering 20+ hours/week of flexible, entry-level work.
Posted Jul 17, 2026
Work remotely as a Turkish-English content reviewer to improve large language models by analyzing, summarizing, and validating Turkish text; bilingual fluency and strong analytical skills required. Flexible contractor role with 20+ hrs/week expectation and some overlap with UTC-8 hours.
Posted Jul 17, 2026
Join OpenTrain as a remote Swedish Analytical AI Trainer to help fine-tune large language models through summarization, research-backed validation, and scenario-based analytical tasks; part-time contractor work requiring Swedish and English and 20+ hours/week with some US-hours overlap.
Posted Jul 17, 2026
Work remotely as a Danish-language AI trainer: read and summarize long texts, research and validate claims, solve analytical puzzles, and provide clear answers and annotations to improve language models. Contractor role, 20+ hours/week with some overlap to US (UTC-8) hours.
Posted Jul 17, 2026
Work remotely as a Korean-English AI content analyst helping train and evaluate multilingual models through summarization, online verification, reasoning puzzles, and writing clear answers; part-time contractor work starting at 20+ hours/week with flexible scheduling. Entry-level candidates with str
Posted Jul 17, 2026
Join OpenTrain to improve LLMs by analyzing Japanese texts: summarize, fact-check, and craft QA scenarios that teach models. Remote part-time contractor role for bilingual Japanese/English contributors, 20+ hours/week with some overlap to US hours.
Posted Jul 17, 2026
Work remotely as a Dutch-English Analytical Content Reviewer for OpenTrain: spend 20+ hours/week reading, summarizing, researching, and annotating long-form text to improve language models through evaluation ratings, RLHF, and QA tasks.
Posted Jul 17, 2026
Join OpenTrain as a remote Arabic Content Analyst to read, verify, and break down Arabic content, craft analytical prompts and model responses, and provide detailed annotations that improve LLM reasoning; bilingual Arabic/English required and this role requires 40 hours/week overlapping US Pacific t
Posted Jul 17, 2026
Join OpenTrain to analyze Italian content, verify claims through online research, and craft clear explanations and scenarios that teach LLMs. This remote contractor role requires fluency in Italian and English, strong analytical writing, and careful judgment to improve model behavior.
Posted Jul 17, 2026
Work remotely as a bilingual English/German AI Content Analyst to summarize long-form content, fact-check claims, and build reasoning scenarios that help train large language models. Flexible contractor, part-time role (20+ hrs/week) with some US-hour overlap.
Posted Jul 17, 2026
Join OpenTrain to help train large language models by reading, summarizing, reasoning, and annotating French and English content. Remote, contractor role requiring bilingual fluency and 20+ hours/week with some US-time overlap.
Posted Jul 17, 2026
Join OpenTrain as a remote Chinese-language LLM analyst to summarize long content, validate claims, create training scenarios, and annotate model responses. This part-time contractor role requires strong English and Chinese written skills and 20+ hours/week.
Posted Jul 17, 2026
OpenTrain AI is hiring remote Image/Video Annotators to label short videos and images for multimodal model training—describe scenes, temporal sequences, moods, and validate AI outputs. Entry-level, contractor role requiring strong English, attention to detail, and 20+ hours/week availability.
Posted Jul 17, 2026
Join OpenTrain AI to review and validate AI-generated Go code for dialog-agent backends in a part-time, remote contractor role (20+ hrs/week). Use your Go expertise and engineering judgment to ensure correct, efficient, and dependable implementations.
Posted Jul 17, 2026
Join OpenTrain to design and solve advanced physics problems and build evaluation benchmarks that fine-tune large language models. This remote, part-time contractor role (20+ hrs/week) suits PhD-level physicists or equivalent with strong symbolic and multi-step reasoning skills.
Posted Jul 17, 2026
Design and solve challenging biology problems to probe and evaluate large language models, creating step-by-step solutions and benchmark material. Remote contractor role (20+ hrs/week), worldwide, English required — OpenTrain AI hires directly.
Posted Jul 17, 2026
Projects that accept applicants located in Spain can include a range of human tasks that help train and assess models. The posting for each role spells out what the work requires and the specific deliverables.
Inspect live listings to see whether they ask for particular languages, subject knowledge, or task types; the list below describes common task categories but is not a promise about any given posting.
A range of everyday skills help you decide whether to explore postings that accept applicants in Spain. These descriptions are ways to judge fit, not eligibility requirements; the live job controls actual qualifications.
Use the skills below to spot postings aligned with your background, then read the listing for the concrete requirements and instructions.
Each posting is the definitive source for eligibility, location rules, required languages, hours, and compensation. Confirm a role explicitly accepts applicants located in Spain before applying and read the posting for all role-specific details.
OpenTrain is the hiring organization for the roles presented on OpenTrain. Candidates apply through OpenTrain and should rely on each live listing for the full description of requirements and responsibilities.
