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 AI to evaluate and compare chatbot responses for real-world small business scenarios in an entry-level, project-based role. Work remotely 20+ hours/week creating prompts, running multi-turn conversations, and submitting structured RLHF-style evaluations.
Posted Jul 29, 2026
Evaluate and improve agentic coding models by reviewing agent trajectories, verifying outputs, and designing rubrics on a 5-week remote contract. Requires 5+ years of hands-on software experience and daily overlap with PST.
Posted Jul 29, 2026
Short-term remote contract for a bilingual French/English analyst to create, label, and evaluate analytical Q&A that improve large language models; part-time (20+ hrs/week) with requirements to overlap US hours and potential extension. Entry-level friendly for strong analytical writers.
Posted Jul 29, 2026
Expert contractor role to design and optimize GPU software for LLM training (CUDA/WebGPU/GLSL). Remote, 20+ hrs/week, $60–$85/hr; requires advanced GPU programming and strong C++ for host-side integrations.
Posted Jul 29, 2026
Use your consulting experience to evaluate AI and human consulting deliverables for real-world projects. Remote, freelance role paying $100–$150/hr with a default 40-hour weekly commitment and flexible part-time options.
Posted Jul 29, 2026
Join OpenTrain as an ML Researcher Evaluation Specialist to assess frontier machine-learning researchers and their publication records for a high-priority pilot; part-time contractor role (20+ hrs/week), remote worldwide, paid $60–$100 USD/hr.
Posted Jul 29, 2026
Create and evaluate realistic business .xlsx/.docx/.pptx examples and provide side-by-side preference data to improve AI document behavior. Remote, contract role (20+ hrs/week) paying $20–60/hr; entry-level applicants with strong Excel/Office skills welcome.
Posted Jul 29, 2026
OpenTrain AI is hiring a remote Privacy Annotation Specialist to review legal documents for PII and confidential content, validate OCR outputs, and perform QA for AI-driven legal workflows; contract, part-time (20+ hrs/week), $105–$140/hr USD.
Posted Jul 29, 2026
Join OpenTrain AI to train next‑generation models by reviewing and annotating microbiology documents (RLHF and evaluation tasks). Remote, contract, 20+ hours/week; pay $70–$90/hr — ideal for candidates with a BSc+ in microbiology/biology and strong scientific communication.
Posted Jul 29, 2026
Join OpenTrain as a PII Document Review Specialist to classify, annotate, and redact sensitive information in documents; part-time contractor work (20+ hrs/week) with pay from $63–$119/hr (USD), remote and worldwide, English required.
Posted Jul 29, 2026
Join OpenTrain AI to review and annotate technical materials science documents, evaluate AI-generated engineering content, and create domain-specific training scenarios — part-time, remote, and paid $80–$130/hr for ~20+ hours/week.
Posted Jul 29, 2026
Join OpenTrain as an Aerodynamics Expert to review, summarize, and rate advanced aerodynamic and CFD documentation for AI training projects; remote contractor work, 20+ hours/week, $80–$130/hr. Help turn engineering results into high-quality training data for next-generation models.
Posted Jul 29, 2026
Join OpenTrain to help train AI through high-quality Word and PDF review, formatting, and data extraction; remote, contractor work at 20+ hours/week with hourly pay between $20–$55 USD. Ideal for experienced document professionals comfortable with regulated materials and confidentiality.
Posted Jul 29, 2026
Join OpenTrain to design realistic business PowerPoint tasks, collaborate with LLMs to create and edit .pptx files, and evaluate model outputs; contract, remote work at $20–$60/hr with a 20+ hour/week commitment. Apply if you have advanced PowerPoint, Excel, and Word experience.
Posted Jul 29, 2026
Join OpenTrain as a part-time contractor to design reinforcement-learning code environments and expert reference solutions that teach AI to code, debug, refactor, and optimize — paid $50–$150/hr. Remote role with flexible hours; apply with a strong GitHub/GitLab record.
Posted Jul 29, 2026
Join OpenTrain to annotate biological documents and shape AI models in computational biology and medicinal chemistry. Part-time contract work (20+ hrs/week), remote worldwide, $90–$120/hr, focused on classification, entity NER, and evaluation tasks.
Posted Jul 28, 2026
Join OpenTrain as a remote Bioinformatics Scientist to curate and validate drug-discovery datasets, review AI-generated scientific outputs, and deliver written feedback that improves model behavior. Part-time contractor work (20+ hrs/week) paying $90–$120/hr USD depending on experience.
Posted Jul 28, 2026
Join OpenTrain as a remote PhD-level Physics Research and AI Evaluation Specialist—conduct physics research, create educational content, and evaluate AI-generated scientific responses. Part-time contractor role (20+ hrs/week) paying $70–$90/hr.
Posted Jul 28, 2026
Design and evaluate AI-powered enterprise workflows as a Senior Enterprise AI Productivity Specialist — 20+ hours/week, remote worldwide, contractor role paying $80–$150/hr. Build automations, integrations, adoption plans, and business-impact documentation.
Posted Jul 28, 2026
Join OpenTrain as a part-time contractor annotating audio and video for AI training (classification and transcription). Entry-level role, 20+ hours/week, paid USD $6–8/hr — help shape real AI data while working remotely.
Posted Jul 28, 2026
Use your COBOL and legacy-systems expertise to review code, explain business logic, and help improve AI training data. This remote contractor role offers $90–$120 per hour and requires 20+ hours per week.
Posted Jul 28, 2026
Use deep COBOL and mainframe expertise to explain legacy systems, evaluate code scenarios, and create training data for AI models. Remote contractor work pays $90–$126 per hour, with a 20+ hour weekly commitment.
Posted Jul 28, 2026
Join OpenTrain as a remote Data Annotator labeling video and audio for AI systems; part-time contract, 20+ hrs/week, $6–$10/hr. No prior AI experience required — attention to detail and strong English are what matter.
Posted Jul 28, 2026
Join OpenTrain AI as a remote Business Analyst to help fine-tune large language models by answering analytical questions, creating scenarios, and labeling text in English and Brazilian Portuguese. Entry-level, contractor role with flexible hours and clear quality targets.
Posted Jul 26, 2026
Evaluate AI-written business email replies for relevance, accuracy, personalization, and professionalism. Remote, entry-level contract work (20+ hrs/week) reviewing multiple model outputs and writing clear evaluation feedback to improve AI behavior.
Posted Jul 25, 2026
Assess AI-generated reproductions of published ML papers: read papers, inspect code/data/output artifacts, rank reproduction attempts, and provide clear written evaluations. Remote, contractor role for experienced ML researchers — 20+ hrs/week.
Posted Jul 25, 2026
Join OpenTrain as a remote Clinical Medicine AI Evaluation Physician to design and run clinical evaluations that test AI medical reasoning. Flexible contract work (20–30 hrs/week), 1-month engagement with possible extensions; licensed physicians only.
Posted Jul 25, 2026
Design and solve multi-step physics problems and write clear step-by-step solutions that probe large language model reasoning. Fully remote contractor role (20+ hrs/week) requiring advanced physics knowledge, scientific Python skills, and a 3-week commitment with PST overlap.
Posted Jul 24, 2026
Remote contractor role evaluating personalization in a conversational AI using your own account data; work in Russian, 20+ hrs/week at $15/hr. Create multi-turn prompts, compare responses side-by-side, and write clear rationales while following strict data hygiene.
Posted Jul 24, 2026
Experienced private equity attorney to review and annotate complex transactional documents for AI training; remote contract, 20+ hrs/week, pay up to $130/hr. Help teach models by providing precise legal analysis, sample clauses, and risk assessments.
Posted Jul 24, 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.
