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Remote AI training and data labeling jobs in Slovakia

Looking for remote AI training or data labeling work you can do from Slovakia? These roles explicitly accept applicants located in Slovakia, but eligibility can change by posting and remote work does not mean a role is physically based there. OpenTrain is the hiring organization for roles on OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support.

  • 100% remote
  • Flexible hours
  • Hourly / per-task pay
  • 6 open roles

Chinese Business Document Review Specialist

Evaluate AI-generated business documents in Chinese—review Excel, PowerPoint and Word deliverables for accuracy, clarity, and professional polish, provide structured feedback across finance, strategy, marketing and operations, and help improve AI outputs. Remote contract; 20+ hrs/week; $20–$70/hr.

Generative AI & RLHF
Document
Remote · Worldwide
Chinese
Part-time · Flexible
Intermediate level
Hourly · $20–$70/hr

Posted Jun 28, 2026

Biology Expert, AI Training & Model Evaluation

Join OpenTrain to apply your biology expertise to train and evaluate AI models: write expert responses, review model outputs, and provide clear scientific feedback. Remote, part-time contractor work paying $80–$90/hr for roughly 20 hours/week over 1–3 months.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $80–$90/hr

Posted Jun 28, 2026

Arabic (MSA) Transcription & Annotation Specialist

OpenTrain AI is hiring fluent Modern Standard Arabic transcribers to produce and correct high-accuracy audio transcriptions, add metadata, and provide quality feedback. Remote contract role, 20+ hours/week, pay $10–$20 USD/hour.

Audio & Speech
Audio
Remote · Worldwide
Arabic, English
Part-time · Flexible
Entry level
Hourly · $10–$20/hr

Posted Jun 28, 2026

Machine Learning Infrastructure Engineer

Join OpenTrain as a part-time contractor building production ML pipelines, deploying models on AWS, and orchestrating containerized workloads; remote worldwide, 20+ hrs/week, pay $30–$90/hr.

Coding & Software
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$90/hr

Posted Jun 28, 2026

.NET Engineering AI Reviewer

Join OpenTrain AI as a remote contractor to evaluate and improve AI outputs for .NET, C#, AWS, and Azure—review code snippets, diagrams, and technical docs. Part-time (20+ hrs/week) with competitive pay in the posted $30–$90/hr range.

Coding & Software
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$90/hr

Posted Jun 28, 2026

VLA Video Annotation Specialist (Level B)

Join OpenTrain AI to label humanoid robotics video for VLA models as a Level B annotator — 20+ hrs/week, contractor, paid USD $6/hr (range $5–$8); Encord experience preferred but other platform experience is accepted.

Image & Video Annotation
Video
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $5–$8/hr

Posted Jun 27, 2026

Contract Redlining Attorney, Legal AI Evaluation

Join OpenTrain as a contract redlining attorney to perform simulated negotiations, review AI contract responses, and build objective evaluation frameworks; part-time remote contractor work, flexible schedule, $80–$105/hr for ~20 hours/week over 1–3 months.

Legal & Finance
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $80–$105/hr

Posted Jun 27, 2026

Telecommunications AI Training Expert

Use your telecom systems expertise to train and evaluate AI: remote, contract, 20+ hrs/week with pay up to $75/hr. Review AI-generated telecom content, document protocols, and shape training materials for practical AI understanding.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $20–$75/hr

Posted Jun 27, 2026

Swedish Language Localization Specialist

Work remotely as a Swedish-language AI training specialist translating, proofreading, and localizing business documents and customer communications; 20+ hours/week, contractor, paid $45–$95 USD/hr. Bring native Swedish fluency and a quality-first approach to shape real-world AI language behavior.

Translation & Localization
Document
Remote · Worldwide
Swedish
Part-time · Flexible
Entry level
Hourly · $45–$95/hr

Posted Jun 27, 2026

Scientific Document Review Specialist

Review scientific figures, lab reports, and technical publications to evaluate model outputs and deliver clear, rubric-based feedback; remote contractor role paying $40–$50/hr, 20+ hrs/week, estimated project earnings $6,400–$8,000.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $40–$50/hr

Posted Jun 27, 2026

Sanskrit Language Specialist (Translation & Review)

Join OpenTrain AI as a remote Sanskrit Language Specialist to translate, proofread, and create high-quality Sanskrit content on a part-time contract basis (under 20 hrs/week). Competitive pay range $45–$95/hr based on work and experience.

Translation & Localization
Text
Remote · Worldwide
Sanskrit
Part-time · Flexible
Entry level
Hourly · $45–$95/hr

Posted Jun 27, 2026

Private Equity AI Training Expert (Remote, Part-Time)

Use your private equity experience to shape finance-focused AI: evaluate model outputs, review investment materials, and create scenario-based training content. Part-time remote contract, 20+ hours/week, pay $30–$65/hr (up to $65/hr), English required.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$65/hr

Posted Jun 27, 2026

UI/UX Designer (Remote Contract)

OpenTrain AI is hiring an intermediate UI/UX Designer for a short contract role (fixed price $100) with a remote, worldwide scope; applicants will complete a brief AI-driven interview that evaluates design skills, tools knowledge, and portfolio work.

Generative AI & RLHF
Text
Remote · Worldwide
Flexible hours
Intermediate level
Fixed price · $100

Posted Jun 15, 2026

Odia-English Biology Content Labeler (Macromolecules)

Label and review short educational content about carbohydrates, lipids, proteins, and DNA/RNA in a bilingual Odia–English project. Fixed-price contract ($20) for contributors who can do text generation, rating, and question answering.

Translation & Localization
Text
Remote · Worldwide
English, Odia +1 more
Flexible hours
Intermediate level
Fixed price · $20

Posted May 15, 2026

Document Extraction Specialist, Legal & Finance

OpenTrain AI seeks detail-oriented contractors to extract structured data from legal, finance, and compliance documents (PDF/DOCX). Part-time, remote work validating and editing AI draft outputs into a required JSON schema; pay USD 8.00–11.20/hr.

Legal & Finance
Document
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $8–$11.2/hr

Posted May 14, 2026

Pathology Superresolution Evaluation

OpenTrain AI seeks licensed pathologists (MD/DO) to compare whole‑slide images and rate superresolution algorithm outputs; remote, contract, part‑time work at a competitive hourly rate (typical $150/hr; $100–$200/hr).

Medical & Health
Image
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $100–$200/hr

Posted May 12, 2026

African-English Cultural Image–Text Annotator (Native Fluency)

Join an academic research project validating and refining image–text samples of African cultural content; native fluency required. Flexible, remote contract work paid $0.29 per sample with weekly payouts and an initial 50-sample pilot per language.

Image & Video Annotation
Image
Remote · Worldwide
Part-time · Flexible
Entry level
Per task · $0.29/label

Posted Apr 28, 2026

Accounting & Finance Document Annotation Specialist

Annotate and restructure accounting and finance PDFs—verify OCR, correct tables, and produce clean HTML and JSON key‑value outputs. Remote contractor role, 20+ hrs/week, $7–$9 USD/hour; ideal for candidates with bookkeeping, audit, or finance reporting experience.

Legal & Finance
Document
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $7–$9/hr

Posted Apr 27, 2026

Native Dutch Voice Actor, Pro Setup Required

Record scripted Dutch dialogue for OpenTrain AI using a professional recording setup; native Dutch fluency and clean, unprocessed audio are required. This part-time contractor role is remote, flexible, and pays a competitive hourly rate.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $83–$107/hr

Posted Apr 23, 2026

Image Quality Scoring, Part-Time Remote Role

Rate and evaluate image quality for dataset development in a remote, part-time contractor role paying $5–$7/hr. Must be fluent in English, have intermediate experience with image quality evaluation or annotation, and be available 20+ hours/week.

Image & Video Annotation
Image
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $5–$7/hr

Posted Apr 15, 2026

Professional Voice Actor, Native Fluency (Remote)

Record high-quality narrated audio for AI training with a flexible part-time contract. Must have professional recording equipment, fluent English, and the ability to follow precise tone, pacing, and pronunciation instructions; paid $50/hr (range $40–$60).

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $40–$60/hr

Posted Apr 10, 2026

Image Annotation Quality Control Specialist

OpenTrain AI is hiring a remote QC specialist to review and correct auto-annotated refinery image frames (8,000). Fixed-price contract ($1,200), 20+ hours/week, using CVAT to adjust bounding boxes and classifications with strong attention to detail.

Image & Video Annotation
Image
Remote · Worldwide
Part-time · Flexible
Intermediate level
Fixed price · $1200

Posted Apr 5, 2026

Computer Science Expert, Python Validation

Contract role to design and evaluate computer-science problems and validate AI solutions using Python (NumPy/Pandas/SciPy). Remote, project-based work paying $15–$40/hr with a typical commitment of ~10–20 hours/week during active phases.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Expert level
Hourly · $15–$40/hr

Posted Apr 5, 2026

Data Science Expert, Python, SQL & GenAI Problem Authoring

Join OpenTrain to design reproducible, industry-grade data science problems and prompts for GenAI training; contract, part-time work (≈10–20 hrs/week) with pay up to $40/hr. Ideal for senior data scientists with expert Python, SQL and ML/MLOps experience.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Expert level
Hourly · $15–$40/hr

Posted Apr 5, 2026

Machine Learning Expert (Python, GenAI, SQL)

Create and verify original computational STEM/ML problems for GenAI training—contract, remote, ~10–20 hrs/week, paid hourly (up to $40/hr). Must have 5+ years ML experience, expert Python and SQL, strong statistics, and written English (C1+).

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Expert level
Hourly · $15–$40/hr

Posted Apr 5, 2026

Senior Chinese (Simplified) Localization Evaluator

Join OpenTrain AI as a remote, part-time contractor to evaluate and localize AI-generated Chinese (Simplified) and English content; requires 5+ years' localization/translation experience, native or near-native Chinese and C1 English, 20+ hours/week, paid $17–$23/hr.

Translation & Localization
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $17–$23/hr

Posted Apr 3, 2026

AI Safety LLM Trainer, Korean C1+ & English

Join OpenTrain AI as a remote, contractor AI Safety LLM Trainer reviewing Korean and English model outputs for safety, policy alignment, and red-team testing; hourly pay $28–$38 and 20+ hours/week. Use senior Trust & Safety experience to rate, analyze, and improve model behavior with clear, reproduc

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $28–$38/hr

Posted Apr 3, 2026

AI Safety Data Reviewer, Japanese/English

Remote, part-time contract reviewing AI outputs for safety, correctness, and cultural nuance in Japanese and English; $27–$31/hr, 20+ hours/week. Use your Trust & Safety and red-teaming experience to shape safer AI behavior across languages.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $27–$31/hr

Posted Apr 3, 2026

Senior Japanese Localization Linguist (C1 English)

Join OpenTrain AI to evaluate and create Japanese-localized AI training content, testing models for accuracy, bias, and cultural fit. Fully remote contractor role paying $24–$31/hr (typical $28/hr); requires native or near-native Japanese and C1-level English.

Translation & Localization
Text
Remote · Worldwide
Flexible hours
Intermediate level
Hourly · $24–$31/hr

Posted Apr 3, 2026

Bilingual LLM Safety Evaluator (Hebrew & English)

Join OpenTrain AI as a remote, part-time contractor reviewing and red-teaming LLM outputs in Hebrew and English to find safety failures and produce labeled evaluation data. $26–$38/hr, 20+ hours/week; your feedback will directly shape model safety.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $26–$38/hr

Posted Apr 3, 2026

What this work can involve

AI training work helps prepare and review examples used by artificial-intelligence systems. Depending on the individual role, that 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 Slovakia, the relevant posting determines which tasks apply and what the work requires.

  • Read each posting to understand the specific task, project scope, and responsibilities.
  • A role may focus on language, visual, audio, search, coding, or subject-matter work, depending on its description.
  • The individual posting is the source of truth for whether the role accepts applicants located in Slovakia.

How hiring works through OpenTrain

OpenTrain is the hiring organization for these public roles, and candidates apply through OpenTrain. After a successful application, OpenTrain may place or refer the candidate to the client whose project they will support. The individual posting provides the role-specific information, including eligibility and other requirements, so review it before applying.

  • Apply through OpenTrain rather than directly to an unnamed third-party platform.
  • Confirm in the individual posting that applicants located in Slovakia are eligible.
  • Check the posting for the responsibilities, qualifications, hours, pay, and location rules that apply to that role.

Frequently asked questions

What can this work involve?
AI training and data labeling work can involve creating or reviewing examples for artificial-intelligence systems. Depending on the role, tasks may include labeling images or video, transcribing or recording audio, writing or rating responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. The individual posting explains which activities are included.
Where can I find role-specific details?
Find the current details in each individual live posting. That posting is the only source of truth for eligibility in Slovakia, responsibilities, qualifications, experience, pay, hours, schedule, location rules, and client-specific requirements. Review the posting carefully because these details can differ between roles and may change.
How does hiring work through OpenTrain?
OpenTrain is the hiring organization for roles on OpenTrain, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Review the individual posting for the role-specific requirements and application information.