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.
Evaluate a new personalization feature for a conversational AI in German: design multi-turn prompts, compare side-by-side responses, and write clear rationales. Contractor role, $15/hr, 3-month engagement, remote with required PST overlap.
Posted Jul 15, 2026
Join OpenTrain to evaluate large language model outputs, create challenging prompts, and deliver recorded verbal feedback; remote, contract role (20+ hrs/week) paying $20–$30/hr. Entry-level friendly for strong American English speakers with LLM experience.
Posted Jul 15, 2026
Join OpenTrain as a remote Economics Expert to create benchmark-quality economics responses, review advanced solutions, and document rationales for AI training—PhD required; $80–90/hr, 20+ hours/week, contract part-time.
Posted Jul 15, 2026
Join OpenTrain as a contractor producing authoritative computer‑science answers, creating golden responses, and reviewing technical solutions to improve AI. PhD required; 20+ hours/week; $80–$90/hr; fully remote and open worldwide (English).
Posted Jul 15, 2026
Bring your PhD in biology to improve AI systems: review and refine biology prompts, scenarios, and model outputs on a part-time, remote contract at $80–90/hr. Work <20 hrs/week on text-based evaluation and generation tasks with OpenTrain AI.
Posted Jul 15, 2026
Join OpenTrain as a remote Physics AI Training Specialist (contract, <20 hrs/week) to create and review advanced physics content that improves AI reasoning; requires a PhD in Physics and pays $80–$90/hr. Work focuses on text-based generation and evaluation tasks.
Posted Jul 15, 2026
Join OpenTrain as a contracted Math Expert (PhD) creating and refining precise model answers for advanced undergraduate and graduate math prompts. Part-time remote work, 20+ hours/week at $80–$90/hr; English required.
Posted Jul 15, 2026
Use your PhD-level statistics expertise to write, review, and explain model responses that teach AI systems; part-time remote contract paying $90–$120/hr for an estimated 1–3 month project with flexible hours.
Posted Jul 15, 2026
Join OpenTrain as a remote Chemistry AI Training Reviewer to write and rate advanced chemistry responses, create golden-reference answers, and improve model behavior — part-time contract paying $80–$90/hr for an estimated 1–3 month engagement.
Posted Jul 15, 2026
Record, transcribe, and rate German voice interactions for a next‑generation AI assistant on your Mac; $38/hr, 20+ hours/week, fully remote and contractor-friendly. Ideal for native German speakers with strong transcription attention to detail.
Posted Jul 14, 2026
Design grading rubrics and score AI and human consulting deliverables with evidence-based written justifications. Remote contractor role, 20+ hours/week, pay $150–$220/hr working for OpenTrain AI on evaluation and quality tasks.
Posted Jul 14, 2026
Create graduate-level multiple-choice questions and exam-quality rationales, review AI-generated mechanical engineering content, and help ensure technical accuracy; contract, remote role paying $60–$130/hr for ~20+ hours/week.
Posted Jul 14, 2026
Remote, part-time contract role writing and reviewing graduate-level electrical engineering exam questions and model outputs; flexible under 20 hrs/week, paid $40–$130/hr. Ideal for PhD or advanced master's holders with university teaching and assessment experience.
Posted Jul 14, 2026
Join OpenTrain as a French Voice Coach delivering personalized pronunciation, diction, and fluency coaching in French; contractor, part-time role paying $30–$65/hr. Work remotely under 20 hours/week designing exercises, giving actionable feedback, and keeping progress records.
Posted Jul 14, 2026
Join OpenTrain as a part-time Hindi Voice Coach helping learners improve pronunciation, intonation, and conversational fluency through remote coaching and audio review. Flexible contractor role (under 20 hrs/week), paid $30–$65/hr, open worldwide to native or near-native Hindi speakers.
Posted Jul 14, 2026
Rate and annotate AI‑generated German-language music for up to 6 months, using music-production and audio-engineering terminology. Remote part‑time contract, 20+ hours/week, $32.48–$58.46/hr; native German and strong English required.
Posted Jul 13, 2026
Join OpenTrain AI to evaluate AI-generated Vietnamese music and lyrics — rate samples, annotate genres and song structure, and apply audio-engineering judgment. Remote contractor role, 20+ hrs/week, paid hourly up to $23.43 (USD).
Posted Jul 13, 2026
Join OpenTrain to evaluate AI-generated music in Swedish—assess songs, lyrics, vocal quality, and production for up to 6 months. Remote, part-time work at $30–$54/hr for experienced music producers, engineers, or mixers.
Posted Jul 13, 2026
Join OpenTrain to evaluate AI-generated Thai music—lyrics, vocals, and full productions—scoring musicality, vocal quality, and genre while annotating song structure. Remote, contractor role paying up to $23.43/hr for under 20 hours/week.
Posted Jul 13, 2026
Join OpenTrain AI to design scoring rubrics and evaluate AI-generated and human brand design work with evidence-based written critiques. Expert role, 20+ hrs/week, remote worldwide, paid $80–$150 USD/hr.
Posted Jul 13, 2026
Join OpenTrain to design rubrics and score AI-generated and human marketing deliverables—creative briefs, campaign concepts, brand frameworks, ad copy and presentations—remotely as a contractor. Flexible part-time work paying $80–$150/hr with a default 40 hr/week commitment.
Posted Jul 13, 2026
Join OpenTrain to evaluate AI and human accounting deliverables—score reconciliations, close packages, financial statements, and workpapers with defensible written rationales; remote contractor role, 20+ hrs/week, $130–$160/hr USD.
Posted Jul 13, 2026
Evaluate AI-generated and human B2B sales work: design grading criteria, score samples, and write evidence-based justifications. Expert role, 20+ hrs/week, remote worldwide, $100–$150/hr (USD), contractor, part-time.
Posted Jul 13, 2026
Annotate robotic surgery video in Supervisely for a part-time, fully remote contractor role applying segmentation, bounding boxes, keypoints, and object tracking; strong attention to detail and medical familiarity required. Pay range $15–$32/hr (hourly rate listed $22/hr); expect ~20+ hrs/week.
Posted Jul 12, 2026
Join OpenTrain as a remote Data Annotation Generalist working 20+ hours/week on English text classification projects; entry-level contributors with strong attention to detail and communication skills are encouraged to apply for $30–$80/hr (USD).
Posted Jul 11, 2026
Join OpenTrain AI as a Video Annotation AI Trainer to label short video clips for model training—work remotely 20+ hours/week and earn $40–$80 per hour while building a verifiable portfolio in a fast-growing field.
Posted Jul 11, 2026
Join OpenTrain to implement C++ checker solutions during a live competitive programming contest — $45–$65/hr, 20+ hrs/week, one-time live participation with estimated project earnings of $7,200–$10,400. Remote, contractor-friendly role for skilled C++ competitive programmers.
Posted Jul 11, 2026
Join OpenTrain AI as a remote Architect CAD and Construction Documentation Reviewer—work 20+ hrs/week creating and reviewing CAD drawings, GD&T callouts, electrical schematics, and PCB layouts to train next-generation AI; $40–$50/hr, worldwide, English required.
Posted Jul 11, 2026
Label short video clips for event classification and precise timestamping in a flexible, remote contractor role. Work 20+ hours/week with pay from $40–$80/hr, using strong attention to detail and English to produce high-quality training data.
Posted Jul 11, 2026
Build C++ checkers and test suites that validate complex competitive-programming submissions for next-generation AI training. Remote, contract role for strong competitive programmers who can design problems, write reference solutions, and document edge-case logic.
Posted Jul 11, 2026
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.
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.
