Looking for AI training or data labeling work as someone located in Luxembourg? These roles explicitly accept applicants in that country, although eligibility can vary by posting. OpenTrain is the hiring organization, candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support.
Join OpenTrain to evaluate a new personalization feature in Japanese: design multi-turn prompts, compare paired model responses, and write clear rationales in a remote, 3-month contractor role paying $15/hr with PST overlap.
Posted Jul 20, 2026
Join OpenTrain as a remote Bahasa Indonesian Content Review Analyst: analyze and summarize long content, fact-check claims, and create analytical QA examples to improve large language models. Contractor role with some US-hours overlap, 20+ hours/week typical and up to 40 hours/week, max 12 months.
Posted Jul 20, 2026
Join OpenTrain AI to design, solve, and evaluate challenging mathematics problems that probe LLM reasoning limits; this remote, part-time contractor role expects 20+ hours/week, advanced graduate-level math knowledge, Python ability, and English fluency.
Posted Jul 20, 2026
Record high-quality scripted English voice samples to train and evaluate text-to-speech models. Remote contract, part-time (20+ hrs/week), requires a quiet studio, professional recording gear, and experience performing long-form audio.
Posted Jul 18, 2026
Join OpenTrain AI to evaluate AI-generated responses using your personal Gmail; native German or Korean speakers who can read English will work remotely 3–4 months, typically 20+ hrs/week with required PST overlap. Contractor, part-time role focused on personalization and quality feedback.
Posted Jul 18, 2026
Join OpenTrain as a Contract Playbook General Counsel to draft and refine commercial contract playbooks and templates, provide annotated agreements, and deliver legal feedback that supports AI training. Part-time contractor role (<20 hrs/week) at $90–$130/hr; active state bar required.
Posted Jul 18, 2026
Join OpenTrain AI as a part-time, contract Senior FreeCAD Engineer reviewing and producing parametric CAD models, assemblies, and production drawings. Remote, 20+ hrs/week; pay range $40–$100/hr (USD).
Posted Jul 18, 2026
Use expert UX/UI judgment to review web and mobile design work, evaluate AI model outputs, and provide feedback that improves AI systems. Remote contractor work pays $25–$40 per hour and requires 20+ hours weekly.
Posted Jul 18, 2026
Use your UX/UI and Figma expertise to create high-quality design examples and critiques that train generative AI models. Part-time contractor role, 20+ hrs/week, remote worldwide, $15–$30/hr.
Posted Jul 18, 2026
Review AI-generated Russian multi-speaker transcriptions and diarization for evaluation-grade audio; remote, entry-level contract work requiring 20+ hours/week and strong attention to verbatim fidelity, timestamps, and JSON output checks.
Posted Jul 17, 2026
Contract with OpenTrain as an AI Quality Analyst evaluating a conversational AI personalization feature: design multi-turn prompts, rate side-by-side text responses, and write defensible rationales. 3-month contract, remote, 20+ hrs/week with required PST overlap.
Posted Jul 17, 2026
Review and validate AI-produced C++ code for correctness, efficiency, and reliability in a remote, contractor role. Ideal for intermediate C/C++ engineers who can spend 20+ hours/week giving clear, actionable feedback to improve generated software.
Posted Jul 17, 2026
Join OpenTrain as a Commercial Contracts Attorney to review and annotate M&A diligence documents and help train AI tools used by transaction teams; part-time contract work at $90–$100/hr, 20+ hours/week, remote and worldwide. Bring 5+ years of commercial contract and VDR experience plus a JD and act
Posted Jul 17, 2026
Seeking a licensed M&A/corporate attorney to evaluate deal scenarios, due diligence materials, and AI-generated legal outputs for 20+ hours/week. Remote, contract work paying $80–$100/hr to reviewers with JD and active bar membership.
Posted Jul 17, 2026
Join OpenTrain to draft high-quality commercial agreement templates used to train next-generation AI systems; remote, contract work at $80–$100/hr for 20+ hours/week. Ideal for practicing or recently qualified commercial attorneys with strong drafting experience.
Posted Jul 17, 2026
Work remotely as a part-time contractor annotating and reviewing Portuguese text for AI—20+ hours/week at $30–$65/hr. Use your native or near-native Portuguese and fluent English to label, evaluate, and improve language data for machine learning.
Posted Jul 17, 2026
Join OpenTrain AI to design challenging biology problems and write rigorous step-by-step solutions that probe large language model reasoning; remote, contractor role for experts in biology (20+ hours/week, English required).
Posted Jul 17, 2026
Write and solve postgraduate-level chemistry problems, produce step-by-step explanations with equations and annotated diagrams, and evaluate model outputs to improve generative AI. Contract, part-time role (20+ hrs/week), remote, English required.
Posted Jul 17, 2026
Join OpenTrain to design and solve advanced physics problems that probe LLM reasoning and symbolic skills; remote, part-time contractor work (20+ hrs/week) for candidates with graduate-level physics experience and strong written English.
Posted Jul 17, 2026
Join OpenTrain AI to design and evaluate graduate- and PhD-level mathematics problems that test and improve large language models; work remotely as a contractor for 20+ hours/week building benchmark questions, reviewing model solutions, writing formal Lean proofs, and validating Python computations.
Posted Jul 17, 2026
Join OpenTrain AI as a French Audio Transcription QA Specialist to review multi-channel French conversations, verifying verbatim transcriptions, speaker diarization, timestamps, and content safety. Remote, contract, part-time work requiring native French and 20+ hours/week.
Posted Jul 17, 2026
Join OpenTrain to QA multi-channel German audio and verified transcriptions for a high-quality multilingual evaluation dataset. Remote, 8-week contractor role (~20+ hrs/week) requiring native German, precise timestamping, JSON validation, and multi-speaker expertise.
Posted Jul 17, 2026
Join OpenTrain to evaluate AI-generated Korean transcriptions and diarization for multi-channel conversational audio; remote, part-time contractor work requiring 20+ hours/week and strong Korean transcription/QC skills.
Posted Jul 17, 2026
Join OpenTrain as a remote Arabic Audio Transcription QA Specialist reviewing multi-channel conversations for an evaluation-grade speech dataset. This part-time contractor role (20+ hrs/week) is ideal for native Arabic speakers skilled in verbatim transcription, diarization, timestamps, metadata, an
Posted Jul 17, 2026
Review AI-generated Japanese transcriptions and diarization for multi-channel, conversational audio—validating timestamps, speaker IDs, and preserving unnormalized speech. Remote, contract work for fluent Japanese speakers with a strong ear; ~20+ hours/week.
Posted Jul 17, 2026
Join OpenTrain AI to evaluate Italian multi-channel transcriptions and diarization for a high-accuracy dataset; remote, part-time contractor work (20+ hrs/week) that requires native/fluent Italian and experience validating JSON metadata and timestamps.
Posted Jul 17, 2026
Remote contract role reviewing AI-generated Spanish multi-speaker transcriptions, diarization, and timestamps for strict accuracy and metadata alignment; 20+ hours/week, worldwide, intermediate-level work for fluent Spanish reviewers with ASR/QA experience.
Posted Jul 17, 2026
Review AI-generated Portuguese (Brazil) transcriptions and diarization for multi-channel recordings, validating timestamps, speaker labels, and verbatim unnormalized speech. Remote, part-time contract role (20+ hrs/week) for entry-level contributors with transcription QA experience.
Posted Jul 17, 2026
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
Review and compare chatbot answers for real small-business scenarios in Japanese in a remote, project-based contractor role. Expect 20+ hours/week creating prompts, running short multi-chatbot conversations, and submitting structured evaluations and transcripts.
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 can 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. For applicants located in Luxembourg, the individual posting determines whether the role is eligible, along with its responsibilities and other requirements.
OpenTrain is the hiring organization for the roles published on OpenTrain, including roles that accept applicants located in Luxembourg. Candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Review each individual live posting for all role-specific details.
