Looking for remote AI training or data-labeling work while located in Estonia? 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. AI-training work can include tasks such as labeling images or video, transcribing audio, evaluating model outputs, or translating text; inspect each posting to learn what the role requires.
OpenTrain seeks a Bulgarian Language Review Specialist to review, translate, and QA Bulgarian–English documents for AI training projects; part-time remote (20+ hrs/week) with flexible hours and global applicants. Compensation is handled through OpenTrain project budgets.
Posted Jul 24, 2026
Join OpenTrain AI to translate, proofread, and QA Welsh text used to train AI systems. This part-time contractor role (20+ hrs/week) requires native or near-native Welsh, strong English, and experience in translation or localization.
Posted Jul 24, 2026
Join OpenTrain as a Kazakh Language Expert to create, review, and translate Kazakh-language content used to train and evaluate AI systems. Remote, flexible work (20+ hrs/week) helping ensure linguistic accuracy, cultural appropriateness, and high-quality model outputs.
Posted Jul 24, 2026
OpenTrain AI seeks a Spanish-language data annotation expert to label and validate Spanish text with linguistic precision. Remote, contract, part-time role (20+ hrs/week) for contributors with native/near-native Spanish and experience in annotation or linguistic QA.
Posted Jul 24, 2026
Join OpenTrain to record and transcribe Catalan speech from anywhere in Spain, part-time. Help build high-quality Catalan audio datasets, work under flexible hours, and earn $14–17/hr (typical $15/hr) as a contractor.
Posted Jul 23, 2026
Join OpenTrain to create and validate parametric FreeCAD models used to train AI—build libraries of mechanical parts and apply GD&T standards while working 20+ hours/week as a contractor paid $40–$100/hr. Intermediate CAD and mechanical design experience required.
Posted Jul 23, 2026
Join OpenTrain AI as a part-time contractor building reinforcement-learning environments and reproducible software tasks that evaluate model programming ability — remote, worldwide, under 20 hrs/week, paying up to $150/hr.
Posted Jul 23, 2026
Annotate images using CVAT and the Segment Anything tool to create polygon outlines for individual objects; entry-level, remote contract work paying $4–$6/hr (typical $5/hr). Start with a short trial and earn more work by meeting speed and accuracy goals.
Posted Jul 22, 2026
Short contract for a bilingual (German/English) reviewer to label and create analytical text scenarios that improve LLM reasoning. One-week, 40 hrs/week remote role with required daily overlap to UTC-8; immediate start.
Posted Jul 22, 2026
Join OpenTrain AI to review, label, and evaluate text that helps fine-tune large language models; this remote, short-term contract requires English and Spanish fluency, strong analytical judgment, and attention to annotation quality.
Posted Jul 22, 2026
Join OpenTrain as a remote Hebrew Language Expert translating, localizing, and QAing Hebrew text for AI training. Contract, part-time role (20+ hrs/week), paid hourly up to $30/hr; native or near-native Hebrew and professional English required.
Posted Jul 22, 2026
Join OpenTrain as a remote contractor to design reinforcement-learning environments that test AI on real-world coding tasks; part-time work with pay up to $150/hr and flexible weekly hours. Use C++, Python, Java, Go, TypeScript, or Rust to build reproducible environments and golden solutions.
Posted Jul 22, 2026
Join OpenTrain as a part-time Chinese Voice Coach to evaluate learner recordings, deliver targeted pronunciation feedback, and create lesson materials — remote work under 20 hrs/week with pay up to $65/hr. Native Mandarin or Cantonese speakers with voice-coaching experience encouraged to apply.
Posted Jul 22, 2026
Join OpenTrain to build and evaluate RL training environments that teach AI systems how to operate cloud infrastructure. Remote contractor role, worldwide, 20+ hrs/week (see schedule), paying $60–$130/hr with estimated project earnings of $9,600–$20,800.
Posted Jul 22, 2026
Join OpenTrain to test an Android mobile app: run supplied test cases, find UI/functional bugs, capture screenshots, and submit clear reproduction steps. Fixed-price contract of $130 for part-time remote work under 20 hours/week; entry-level testers welcome.
Posted Jul 21, 2026
Join OpenTrain AI to design rigorous, reproducible scientific-reasoning datasets that evaluate and improve LLMs. 8-week remote contractor role at 20+ hrs/week requiring 3+ years of physics experience and strong quantitative modeling skills.
Posted Jul 21, 2026
Join OpenTrain AI to QA multi-channel, unscripted US English audio and human-verified transcripts—checking fidelity, word-level timestamps, speaker IDs, metadata, and safety. Entry-level contractor role, 20+ hours/week, fully remote and worldwide.
Posted Jul 21, 2026
Join OpenTrain as a Medicinal Chemistry Review Specialist to evaluate and improve medicinal-chemistry datasets used to train advanced AI — contract, part-time, remote, 20+ hrs/week at $60–$80/hr. Provide expert reviews of structures, reactions, SARs, and experimental design.
Posted Jul 21, 2026
Apply advanced neuroscience expertise to annotate, review, and author neuroscience research, case studies, and scenario-based materials used to train generative AI — remote contract, part-time (20+ hrs/week), $60–$80/hr. Prior AI training experience not required.
Posted Jul 21, 2026
Apply your biochemistry expertise to annotate, validate, and refine biochemical datasets and model outputs for life-sciences AI; remote, 20+ hrs/week contract at $60–$80/hr. Join OpenTrain to shape how AI systems learn from scientific data.
Posted Jul 21, 2026
OpenTrain AI seeks an advanced-degree molecular biologist to review protocols, create annotations, and evaluate AI-generated scientific outputs. This remote, contract role is 20+ hours/week and pays $60–$80/hr for high-quality, evidence-based work.
Posted Jul 21, 2026
Join OpenTrain as a Pharmacology AI Training Expert helping train and evaluate AI responses about pharmacokinetics, pharmacodynamics, drug interactions, and therapeutic use. Contract role, 20+ hrs/week, paid $60–$80/hr for experienced PharmD/PhD/MD candidates.
Posted Jul 21, 2026
Join OpenTrain as a Human Data Manager to design and run annotation and data workflows, track KPIs, and improve dataset quality for AI training. Part-time contractor role, remote, paying $40–$60/hr with flexible hours (20+ hrs/week).
Posted Jul 21, 2026
Join OpenTrain AI as an Immunology AI Training Expert to evaluate and improve AI-generated immunology content, design datasets and case studies, and help shape scientifically accurate model outputs. Part-time contractor role (20+ hrs/week) paying $60–$80/hour, remote and worldwide.
Posted Jul 21, 2026
OpenTrain is hiring a remote contractor to review and produce production-ready parametric 3D CAD models, engineering drawings, and technical documentation. Part-time, 20+ hours/week; pay range $40–$100 USD/hr (posted rate $100/hr).
Posted Jul 21, 2026
Design realistic cloud infrastructure tasks and reproducible environments to train next-generation AI systems. Remote contractor role (20+ hrs/week), $40–$100/hr, requires senior hands-on platform experience in cloud, SRE, or DevOps.
Posted Jul 21, 2026
Join OpenTrain AI as a remote, part-time Macroeconomic Modeling Specialist to build and validate EViews-based time-series forecasting models (VAR, VECM, ARIMA). This contract role pays $35–$100/hr, requires strong econometrics and EViews scripting, and is under 20 hrs/week.
Posted Jul 21, 2026
Build high-fidelity Open 3D Engine simulations and Python/C++ automation for synthetic data used in AI training. Contract, remote, 20+ hrs/week; pay range $20–$120/hr depending on scope and experience.
Posted Jul 21, 2026
Join OpenTrain as a Lightworks post-production expert reviewing AI-generated guidance for advanced editing workflows. Remote, contract, part-time (20+ hrs/week), paid $50–$100 USD per hour to help improve how AI understands real Lightworks workflows.
Posted Jul 21, 2026
Build and refine 2D games with Cocos2d-x to generate high-quality training data for AI—remote, contract, 20+ hrs/week, $50–$110/hr. Entry-level developers with proven Cocos2d-x experience, strong problem-solving, and clear communication are encouraged to apply.
Posted Jul 21, 2026
Roles that explicitly accept applicants located in Estonia involve human review and preparation of examples used to train or evaluate AI systems. Depending on the individual posting, tasks can include annotating images or video, transcribing or labeling audio, rating or writing model responses, evaluating search results, translating text, or applying subject-matter knowledge to verify outputs. Each listing specifies the exact responsibilities, required languages, and any domain knowledge needed, so candidates should read postings closely to see whether the tasks match their skills and interests.
All applications for roles that accept applicants located in Estonia are handled through OpenTrain. OpenTrain is the hiring organization for the public roles on this site and may place or refer successful candidates to the client whose project they will support. Eligibility, hours, pay, and other hiring details are set by each posted role, so review the posting for the rules that apply to that opportunity.
