Looking for remote AI training or data labeling work while located in Japan? OpenTrain is the hiring organization for roles that explicitly accept applicants located in Japan; candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Review each live posting carefully because eligibility, hours, qualifications, and pay are specified per role.
OpenTrain seeks an expert Senior Webflow Developer to build and optimize responsive Webflow sites part-time (under 20 hrs/week). Earn $35–$50/hr converting Figma to production, managing CMS, creating animations, improving SEO/CRO, and automating workflows.
Posted Jul 9, 2026
Join OpenTrain to train next-generation coding assistants by running, evaluating, and documenting agent-driven software workflows. Part-time remote contract work (20+ hrs/week) paying $70–$126/hr for hands-on technical testing, code review, and process documentation.
Posted Jul 9, 2026
Create realistic business documents and evaluate AI-generated responses to improve how models handle professional scenarios; remote contractor role paying $35–$50/hr with a ~20+ hour/week commitment.
Posted Jul 9, 2026
Work remotely as a contractor reviewing packing lists, bills of lading, inventory registers, and supply-chain documents to train AI systems; 20+ hours/week, $40–$50/hr. Join OpenTrain AI to turn your logistics experience into flexible, high-impact annotation work.
Posted Jul 9, 2026
Lead QA for Japanese AI-generated content on OpenTrain: review outputs, coach trainers and QAs, maintain style guides, and help scale quality processes. Contract, 20+ hrs/week, $55/hr, remote within Japan.
Posted Jul 9, 2026
Join OpenTrain as a remote contractor evaluating Japanese AI responses: fact-check, rate outputs, and write model solutions. $40/hr, 20+ hours/week; applicants must be based in Japan with native/near-native Japanese and C1 English.
Posted Jul 9, 2026
OpenTrain seeks a remote Chemistry Expert Reviewer to design, review, and refine chemistry content and problems for AI training; PhD or ABD with teaching and research experience required. Part-time contractor role, 20+ hrs/week, $70–$90/hr.
Posted Jul 7, 2026
Use your computational biology expertise to evaluate and annotate AI-generated outputs across genomics, structural biology, and systems biology. Remote contractor role, 20+ hrs/week, $40–$60/hr — help shape safer, more accurate scientific AI.
Posted Jul 7, 2026
Apply your computational chemistry expertise to review simulations, electronic-structure methods, and cheminformatics pipelines used to train and validate chemistry-focused AI systems. Remote contract role, 20+ hrs/week, $40–$60/hr.
Posted Jul 7, 2026
Join a long-term, remote video-annotation contract to help train vision-language action models by classifying activities and marking objects in everyday household videos using Encord. Fixed-price contract ($58,000 USD) with up to 180 hours/month per annotator and ongoing work for top performers.
Posted Jul 7, 2026
Join OpenTrain AI as a part-time, remote Software Engineer focused on QA and testing for AI-powered video generation products — 20+ hrs/week at $30–$42/hr. Bring TypeScript experience, a portfolio of self-built projects, and QA/test automation skills to help improve real AI products.
Posted Jul 6, 2026
Join OpenTrain as an Engineering Document Review Expert to evaluate technical reports, design documents, and project analyses for AI training — remote contractor role, 20+ hours/week, paid $20–$40 USD/hour. Ideal for engineers with technical-reporting experience.
Posted Jul 3, 2026
Join OpenTrain to review and validate technical chemistry documents for AI training—edit experimental write-ups, fact-check equations and datasets, and produce clear explanations. Remote contractor role, 20+ hrs/week, pay $20–$40 USD/hr, English required.
Posted Jul 3, 2026
Join OpenTrain AI as a remote Physics Content Review Specialist to evaluate and refine physics documents used to train AI models; this contractor role requires 20+ hours/week and pays $20–$50/hr. Bring your physics background to improve model reasoning and scientific accuracy.
Posted Jul 3, 2026
Join OpenTrain as a Mathematics Expert to write and evaluate advanced math solutions and proofs that train and benchmark AI systems. Flexible contract work (20+ hrs/week), remote worldwide, $20–$40/hr.
Posted Jul 3, 2026
Share original, professionally authored legal documents to help train responsible AI agents — remote contractor work, 20+ hours/week, paid $20–$40/hr. Ideal for practicing lawyers, legal researchers, or compliance consultants with strong drafting and legal-analysis experience.
Posted Jul 3, 2026
Join OpenTrain as a remote, part-time Computer Science AI Training Specialist to author and evaluate technical examples that teach AI systems; contractor work at $20–$40/hr for 20+ hours/week. Ideal for CS graduates with strong writing and domain expertise in algorithms, systems, databases, networki
Posted Jul 3, 2026
Apply your financial analysis expertise to review reports and write structured feedback that trains AI systems. Remote, part-time contractor work (20+ hrs/week) paying $20–$40/hr with estimated project earnings of $3,200–$6,400.
Posted Jul 3, 2026
Join OpenTrain to develop and review physics problems, solutions, and explanations used to train and evaluate AI; remote contractor role for PhD-level candidates at $70–$90/hr, 20+ hours/week. Work is asynchronous and text-focused.
Posted Jul 3, 2026
Join OpenTrain to review and annotate biological datasets and documents, author and edit lab reports, and craft prompts that teach AI biological concepts. Part-time contractor role (20+ hrs/week), paid $20–$40/hr, fully remote and open worldwide.
Posted Jul 3, 2026
Join OpenTrain AI to transcribe and analyze Tongan audio, help train language models, and shape AI with cultural expertise; remote, contract role paying $45–$95/hr with a typical 20+ hour weekly commitment. Native or near-native Tongan and English fluency required.
Posted Jul 3, 2026
Join OpenTrain to design AML, fraud and scam scenarios and shape detection frameworks for AI systems in a remote contract role (20+ hrs/week) paying $50–$90/hr. Use hands-on financial-crime experience to write scenario libraries, escalation criteria, and practical guidance.
Posted Jul 3, 2026
Lead red-team evaluation for AI security: design offensive-evaluation frameworks, safe proxy tasks, and scoring rubrics. Remote contractor role, 20+ hrs/week, $50–$90/hr; requires 5+ years in offensive security, red teaming, or vulnerability research.
Posted Jul 3, 2026
Submit original medical documents you authored to help train AI — remote contractor role paying $20–$40/hr for 20+ hours/week. Worldwide, English-language submissions only; strong de-identification and medical judgment required.
Posted Jul 3, 2026
OpenTrain AI is hiring senior physicists to adjudicate contested physics arguments, compare solutions, and produce rigorous written evaluations used to train next-generation AI systems. This remote contractor role requires a PhD, senior research leadership, ongoing publications, 20+ hours/week, and
Posted Jul 3, 2026
Annotate short first-person household task videos to train AI: classify clips, track objects across frames, and write clear quality judgments. Remote contractor role, $20/hr, 20+ hrs/week, start within ~24 hours with estimated project earnings of $3,200.
Posted Jul 3, 2026
Join OpenTrain as a Senior Full Stack Engineer building web systems that power AI-training workflows. Remote contractor role, 20+ hrs/week, pay $30–$90/hr; 3+ years full‑stack experience required.
Posted Jul 3, 2026
Work remotely as a Software Engineer on Human Data Platforms building document workflows and pipelines for AI training; part-time contractor role at $50–$70/hr (20+ hrs/week) requiring Python, React, cloud, and document-processing experience.
Posted Jul 3, 2026
Remote contract role transcribing and timestamping Dioula and English spoken video, and evaluating tone, intent, grammar, and nuance to improve AI language models; 20+ hrs/week, pay $15–$95/hr. Ideal for bilingual linguists or experienced transcribers comfortable with independent, detailed language
Posted Jul 3, 2026
Join OpenTrain AI as a contract Cocos2d-x developer building and refining 2D gameplay systems that support AI training and data-generation projects. Remote, part-time (20+ hrs/week), pay up to $120/hr; entry-level candidates with hands-on Cocos2d-x experience encouraged to apply.
Posted Jul 3, 2026
Work labeled for applicants in Japan covers tasks that help teach and evaluate machine-learning systems. Depending on the posting, that can include annotating images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge to label or verify content. Exact responsibilities, acceptance criteria, and deliverables vary by assignment, so inspect the individual posting for the project you want to apply to.
All applications for these roles go through OpenTrain. OpenTrain is the hiring organization for roles open to applicants located in Japan, and OpenTrain may place or refer successful candidates to the client whose project they will support. The live posting for each role is the authoritative source for eligibility, qualifications, hours, pay, location rules, and any client-specific requirements.
