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Remote AI training and data labeling jobs in Croatia

Looking for remote AI training or data labeling work open to applicants located in Croatia? OpenTrain is the hiring organization, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they support. Review each posting because eligibility and role details can differ.

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

Video Annotator, Vision-Language Action (VLA)

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.

Image & Video Annotation
Video
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Fixed price · $58000

Posted Jul 7, 2026

AI Quality & Testing Software Engineer

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.

Coding & Software
Video
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $30–$42/hr

Posted Jul 6, 2026

Engineering Document Review Expert

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.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Chemistry Document Review Specialist

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.

Writing & Editing
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Physics Content Review Specialist

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.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$50/hr

Posted Jul 3, 2026

Mathematics Expert, Advanced Problem Solving & Evaluation

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Legal Document AI Training Expert (Remote Contract)

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.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Computer Science AI Training Specialist

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

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Financial Document Review Specialist

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.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Physics Professor / Researcher, AI Content Reviewer

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $70–$90/hr

Posted Jul 3, 2026

Biology Document Review Specialist

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Financial Crime & AML Compliance Expert (Remote Contract)

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jul 3, 2026

Red Team Lead, Offensive Cybersecurity for AI Evaluation

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jul 3, 2026

Medical Document AI Training Specialist

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.

Medical & Health
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Video Content Data Labeling Associate (POV Household Videos)

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.

Image & Video Annotation
Video
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20/hr

Posted Jul 3, 2026

Senior Full Stack Engineer (Remote, Contract)

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.

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

Posted Jul 3, 2026

Software Engineer, Human Data Platforms

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.

Coding & Software
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$70/hr

Posted Jul 3, 2026

Cocos2d-x Game Developer

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.

Coding & Software
Computer Code Programming
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$120/hr

Posted Jul 3, 2026

Medical / Healthcare AI Trainer (Remote, Part-Time)

Join OpenTrain AI as a part-time, remote Medical / Healthcare AI Trainer reviewing clinical documentation and care workflows; $15–25/hr, 20+ hours/week. No prior AI experience required—bring healthcare knowledge, attention to detail, and clear writing.

Medical & Health
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $15–$25/hr

Posted Jul 1, 2026

Video AI Training Specialist (Remote, Part-Time)

Join OpenTrain as a Video AI Training Specialist reviewing and annotating AI-generated and real-world video. Part-time contractor role (20+ hrs/week) paying $65–$80/hr, ideal for experienced video professionals who enjoy precise critique and dataset work.

Image & Video Annotation
Video
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $65–$80/hr

Posted Jun 30, 2026

Video Editor AI Training Specialist

Join OpenTrain as a Video Editor AI Training Specialist to review AI-generated animations and VFX, build evaluation rubrics, and curate video datasets; remote, 20+ hrs/week, paid $30–$80/hr (up to $80/hr).

Image & Video Annotation
Video
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$80/hr

Posted Jun 30, 2026

Uzbek Bilingual Video Transcription Expert

Join OpenTrain AI to transcribe and linguistically review Uzbek video content: timestamp dialogue, annotate emotion and tone, and provide grammatical and idiomatic feedback. Part-time contractor role (min 15 hrs/week, under 20), paid $45–$95/hour, remote worldwide.

Audio & Speech
Video
Remote · Worldwide
Uzbek, English
Part-time · Flexible
Entry level
Hourly · $45–$95/hr

Posted Jun 30, 2026

Romanized Hindi Transcription Specialist

Join OpenTrain AI to transcribe and annotate Romanized Hindi audio and text, correct machine transcripts, and add metadata; remote contract work at $8–$16 USD/hr with a 20+ hour weekly commitment. Ideal for detail-oriented transcribers fluent in Romanized Hindi.

Audio & Speech
Audio
Remote · Worldwide
Hindi
Part-time · Flexible
Entry level
Hourly · $8–$16/hr

Posted Jun 30, 2026

Python Game Developer (Panda3D) for AI Training

Join OpenTrain AI to build and optimize Panda3D-based 3D simulations that train machine learning models; contract, remote work at 20+ hrs/week with pay between $50–$120 USD/hour. You'll code in Python and C++, collaborate via GitHub, and document technical designs.

Coding & Software
Computer Code Programming
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$120/hr

Posted Jun 30, 2026

Physics PhD AI Training Expert

Seeking a remote Physics PhD to create, review, and evaluate advanced physics problem sets and model outputs for AI training; part-time contract (~20 hrs/week) paying $80–$90/hr for 1–3 months. Work focuses on text tasks: question answering, text generation, and evaluation.

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

Posted Jun 30, 2026

PhD Engineering AI Training Specialist

Apply your PhD engineering expertise to write authoritative responses, design experiments, and analyze results for AI training; remote, part-time contract at $80–$90/hr for 20+ hours/week. English required; worldwide applicants welcome.

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

Posted Jun 30, 2026

Node.js Code Review Specialist

Join OpenTrain as a remote contractor reviewing Node.js, JavaScript, and TypeScript code to create high-quality training data for AI systems; part-time (≈20 hrs/week) for 1–3 months, paid $30–$90/hr. Bring strong backend experience and clear technical communication.

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

Posted Jun 30, 2026

Myanmar Bilingual Language Reviewer

Join OpenTrain to transcribe and annotate Myanmar–English video data with precise timestamps, cultural insight, and linguistic analysis. Flexible part-time contractor work (20+ hrs/week) paying $45–$95/hr for high-quality bilingual reviewers.

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

Posted Jun 30, 2026

Military Operations & IHL Expert

Join OpenTrain to apply your military operations, targeting, and international humanitarian law expertise to evaluate AI model outputs and design policy-relevant evaluation tools; remote contract work, 20+ hrs/week, $50–$90/hour. Help shape responsible AI behavior in defense and humanitarian context

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $50–$90/hr

Posted Jun 30, 2026

Mental Health Crisis Prevention Expert

Join OpenTrain to help design taxonomies, rubrics, and benchmarks for detecting self-harm, eating disorders, and suicide risk in AI systems; remote, contractor role (20+ hrs/week) paying USD $50–$90/hr, English required.

Medical & Health
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jun 30, 2026

What this work can involve

AI training and data labeling work can involve preparing or reviewing examples used by artificial-intelligence systems. Depending on the role, tasks may 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. A remote role that accepts applicants located in Croatia is not necessarily physically based there, and each posting determines its own location rules and responsibilities.

  • Possible tasks include image or video labeling, audio work, response evaluation, search-result review, translation, code review, and subject-matter assessment.
  • The individual posting is the source of truth for the work and its requirements.
  • Check each listing to confirm whether applicants located in Croatia are eligible.

How hiring works through OpenTrain

OpenTrain is the hiring organization for roles available through OpenTrain, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they support. Individual postings control eligibility, qualifications, experience, pay, hours, schedule, location rules, and client-specific requirements, so read the relevant listing for the details that apply.

  • Apply through OpenTrain for the role described in the individual posting.
  • Confirm in the listing that applicants located in Croatia are eligible.
  • Review the complete posting for role-specific requirements and terms.

Frequently asked questions

What can this work involve?
Remote AI training and data labeling work open to applicants located in Croatia 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. The exact duties depend on the individual live posting.
Where can I find role-specific details?
Find role-specific details in the individual live posting. That listing controls eligibility, responsibilities, qualifications, experience, pay, hours, schedule, location rules, and client-specific requirements, including whether applicants located in Croatia can apply.
How does hiring work through OpenTrain?
OpenTrain is the hiring organization, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they support. The individual live posting provides the applicable requirements and terms for each role.