Looking for remote AI training or data labeling work while located in Serbia? OpenTrain is the hiring organization, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support.
Work remotely as a Korean-English AI content analyst helping train and evaluate multilingual models through summarization, online verification, reasoning puzzles, and writing clear answers; part-time contractor work starting at 20+ hours/week with flexible scheduling. Entry-level candidates with str
Posted Jul 17, 2026
Join OpenTrain to improve LLMs by analyzing Japanese texts: summarize, fact-check, and craft QA scenarios that teach models. Remote part-time contractor role for bilingual Japanese/English contributors, 20+ hours/week with some overlap to US hours.
Posted Jul 17, 2026
Work remotely as a Dutch-English Analytical Content Reviewer for OpenTrain: spend 20+ hours/week reading, summarizing, researching, and annotating long-form text to improve language models through evaluation ratings, RLHF, and QA tasks.
Posted Jul 17, 2026
Join OpenTrain as a remote Arabic Content Analyst to read, verify, and break down Arabic content, craft analytical prompts and model responses, and provide detailed annotations that improve LLM reasoning; bilingual Arabic/English required and this role requires 40 hours/week overlapping US Pacific t
Posted Jul 17, 2026
Join OpenTrain to analyze Italian content, verify claims through online research, and craft clear explanations and scenarios that teach LLMs. This remote contractor role requires fluency in Italian and English, strong analytical writing, and careful judgment to improve model behavior.
Posted Jul 17, 2026
Work remotely as a bilingual English/German AI Content Analyst to summarize long-form content, fact-check claims, and build reasoning scenarios that help train large language models. Flexible contractor, part-time role (20+ hrs/week) with some US-hour overlap.
Posted Jul 17, 2026
Join OpenTrain to help train large language models by reading, summarizing, reasoning, and annotating French and English content. Remote, contractor role requiring bilingual fluency and 20+ hours/week with some US-time overlap.
Posted Jul 17, 2026
Join OpenTrain as a remote Chinese-language LLM analyst to summarize long content, validate claims, create training scenarios, and annotate model responses. This part-time contractor role requires strong English and Chinese written skills and 20+ hours/week.
Posted Jul 17, 2026
OpenTrain AI is hiring remote Image/Video Annotators to label short videos and images for multimodal model training—describe scenes, temporal sequences, moods, and validate AI outputs. Entry-level, contractor role requiring strong English, attention to detail, and 20+ hours/week availability.
Posted Jul 17, 2026
Join OpenTrain AI to review and validate AI-generated Go code for dialog-agent backends in a part-time, remote contractor role (20+ hrs/week). Use your Go expertise and engineering judgment to ensure correct, efficient, and dependable implementations.
Posted Jul 17, 2026
Join OpenTrain to design and solve advanced physics problems and build evaluation benchmarks that fine-tune large language models. This remote, part-time contractor role (20+ hrs/week) suits PhD-level physicists or equivalent with strong symbolic and multi-step reasoning skills.
Posted Jul 17, 2026
Design and solve challenging biology problems to probe and evaluate large language models, creating step-by-step solutions and benchmark material. Remote contractor role (20+ hrs/week), worldwide, English required — OpenTrain AI hires directly.
Posted Jul 17, 2026
Join OpenTrain AI as a freelance Chemistry LLM Training Expert to create and solve postgraduate-level chemistry problems, annotate mechanisms, and craft clear explanations for LLM fine-tuning. This part-time contract requires PhD-level expertise and 20+ hours/week of remote work.
Posted Jul 17, 2026
Design and solve advanced physics problems to probe large language models' multi-step reasoning and symbolic skills; remote, contract, 20+ hours/week working with OpenTrain AI to build benchmarks from undergraduate to PhD levels.
Posted Jul 17, 2026
Join OpenTrain as a Java AI Training Developer working 20+ hours/week on a contract, part-time basis to build and evaluate code-centric datasets, rank model responses, and support RLHF and fine-tuning. Use your Java skills to improve model alignment, clarity, and technical accuracy.
Posted Jul 17, 2026
Contract JavaScript/TypeScript developer to build and evaluate AI models and datasets (20+ hrs/week, remote worldwide). Combine full-stack development with model benchmarking, response ranking, RLHF/SFT support, and written evaluation rationales.
Posted Jul 17, 2026
Join OpenTrain as an AI Model Evaluation Developer to write and maintain code, run model benchmarks, rank responses, and build datasets for fine-tuning and RLHF. This remote, part-time contractor role requires strong Python and JavaScript/TypeScript skills and 20+ hours/week.
Posted Jul 17, 2026
Work remotely as an AI Data Review and Annotation Specialist for OpenTrain, spending 20+ hours/week labeling and evaluating text to improve AI models. This contractor, part-time role requires strong English, attention to detail, and the ability to apply detailed guidelines consistently.
Posted Jul 16, 2026
Design and evaluate realistic coding tasks that train and test large language models for software engineering. Remote, contractor role (20+ hrs/week) for experienced engineers who can write tasks, tests, and review AI-generated code.
Posted Jul 16, 2026
Use your board game expertise, strategic reasoning, and knowledge of complex rules to create and evaluate tasks that improve next-generation AI models. This two-month contractor assignment requires at least 20 hours per week, including PST overlap.
Posted Jul 16, 2026
Join OpenTrain AI as a contract AI Quality Analyst (Dutch) to design multi-turn, personalization-based prompts and evaluate model responses for grounding, integration, and helpfulness; 1-month engagement at $20/hr with required PST overlap. Remote, flexible, entry-level.
Posted Jul 16, 2026
Join OpenTrain as a contractor evaluating a conversational AI personalization feature in Vietnamese. Earn $15/hr on a 3-month, fully remote engagement designing multi-turn prompts, rating responses side-by-side, and writing clear rationales with a required PST overlap.
Posted Jul 16, 2026
Remote contractor role evaluating a conversational AI personalization feature in Thai by designing multi-turn prompts, comparing side-by-side responses, and writing structured rationales. 3-month contract at $15/hr with a minimum 4 hours/day and 4-hour overlap to PST.
Posted Jul 16, 2026
Evaluate personalization for a leading generative AI in Hindi: design multi-turn prompts, compare and rate responses, and write clear rationales. Remote contractor role, 20+ hrs/week, $15/hr, requires strong Hindi reading/writing and overlap with PST.
Posted Jul 16, 2026
Evaluate and shape AI personalization in Indonesian — $15/hr, contractor work with a minimum of 20 hours/week; ideal candidates can commit 30+ hours with PST overlap. Design multi-turn prompts, rate model outputs, write clear rationales, and verify grounding.
Posted Jul 16, 2026
Immediate 3-month contract evaluating Turkish-language personalization for a generative AI; $15/hr, minimum 30 hrs/week with 4 hours overlap with PST. Design multi-turn prompts, compare side-by-side responses, and write clear rationales to shape model behavior.
Posted Jul 16, 2026
Join OpenTrain AI to evaluate personalized, multi-turn Korean AI conversations — remote, part-time contractor work at $15/hr for 20+ hours/week. Create prompts, compare side-by-side responses, and write concise rationales to improve model grounding and helpfulness.
Posted Jul 16, 2026
Join OpenTrain to evaluate personalized AI responses in Chinese: a part-time contractor role (20+ hrs/week) paying $15/hr, worldwide remote. You'll design multi-turn prompts, compare side-by-side answers, and write concise, structured rationales calling out grounding and inference errors.
Posted Jul 16, 2026
Contractor role evaluating Spanish-language personalization for Gemini: design multi-turn prompts, rate side-by-side model outputs, and write clear, defensible rationales. 3-month engagement, remote worldwide, $15/hr, 20+ hrs/week with daily availability and a 4-hour PST overlap required.
Posted Jul 16, 2026
Join OpenTrain AI as a contractor evaluating a model personalization feature in Arabic: design multi-turn prompts, compare side-by-side responses, and write clear rationales. 3-month contract at $15/hr with a flexible schedule (20+ hrs/week typical) and required PST overlap.
Posted Jul 16, 2026
AI training and data labeling work helps prepare and review examples used by artificial-intelligence systems. Depending on the individual role, tasks may 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. These roles explicitly accept applicants located in Serbia, but the posting for each role determines the actual responsibilities and requirements.
OpenTrain is the hiring organization for the roles available through OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Because requirements are set at the individual posting level, read the relevant listing for the details that apply to that opportunity.
