Looking for remote AI training or data labeling work open to applicants located in Hungary? OpenTrain is the hiring organization for the roles on this page, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. AI training work helps prepare and review examples used by artificial-intelligence systems. Depending on the posting, it may involve labeling images or video, transcribing audio, evaluating search results, writing or rating responses, translating text, reviewing code, or applying subject-matter knowledge.
Join OpenTrain AI to red-team large language models and agents, building reproducible attack tests, automation, and security tooling. Part-time remote work for certified cybersecurity professionals with strong scripting and pentesting experience, flexible hours, pay up to $55/hr.
Posted Nov 17, 2025
Join OpenTrain AI to label volleyball actions in images (spike, block, serve, set, receive) using CVAT. Entry-level, part-time contractor work paid per label ($0.03), remote and flexible — under 20 hours/week with examples and guidelines provided.
Posted Nov 16, 2025
Label volleyballs in rally images using CVAT for a one-time, flexible task paid at $0.04 per label; open to entry-level contributors worldwide with less than 20 hours/week commitment.
Posted Nov 14, 2025
Annotate 200 high-resolution (20MP) smartphone front-screen photos to segment surface defects (scratches, pits, cracks, blemishes, discoloration). Entry-level, part-time contractor work using Label Studio — pre-annotations provided, remote worldwide, $2/hr, <20 hrs/week.
Posted Nov 14, 2025
Join OpenTrain as a part-time, contract Portuguese QA Annotator reviewing Portuguese AI outputs for quality, correctness, and guideline alignment. Flexible hours (<20 hrs/week), $15/hr, must reside in Portugal with C1+ European Portuguese and B2+ English.
Posted Nov 12, 2025
Italy-based contract role reviewing and scoring Italian AI outputs — C1+ Italian and B2+ English required. Flexible part-time work (<20 hrs/week) with $17/hr pay; audit labels, tag entities and sentiment, write reviewer notes, and suggest guideline improvements.
Posted Nov 12, 2025
Annotate recycling images by outlining individual objects with polygons using CVAT and the Segment Anything interactor; entry-level, remote contractor work paid at $5/hr. Start with a small paid trial and earn more by meeting speed and accuracy targets.
Posted Nov 11, 2025
Join OpenTrain AI to annotate images for a PPE-detection model—create precise bounding boxes and polygon masks across eight classes using Roboflow. Fixed-price contractor role: $2,000 total, fully remote and open worldwide to expert labelers.
Posted Nov 4, 2025
Annotate conversational banking data for an AI financial advisor: intent labels, merchant/transaction categories, assistant-response evaluation, function-call tagging, and SQL-safety checks. Contractor project (remote worldwide) using AWS SageMaker; fixed-price $2,000.
Posted Oct 30, 2025
Join OpenTrain AI to label buttons and icons in product photos using bounding boxes and polygons; this entry-level, remote contractor role pays $0.05 per labeled item. Work on small batches of images in Label Studio — flexible, part-time work that helps train real machine-learning systems.
Posted Oct 27, 2025
Remote contract role building polished, responsive web UIs — 17–20 hrs/week, $35/hr. You must have 2–6 years frontend/full‑stack experience, strong JS/TS with React/Next.js/Vue/Angular, and a public live portfolio link to apply.
Posted Oct 27, 2025
Join OpenTrain AI as a remote contractor verifying and annotating company records (name, jurisdiction, website, directors, shareholders, revenue range, payment types) using careful human research and Excel highlights; $15/hr, intermediate-level, worldwide.
Posted Oct 27, 2025
Paid remote contractor role reviewing AI-generated chemistry reasoning at $80/hr. Requires a BS/MS/PhD (or in progress) in chemistry, strong quantitative and lab literacy, and 17–20 hrs/week availability; includes paid qualification and project exams.
Posted Oct 24, 2025
Evaluate AI-generated biology responses for correctness, experimental design, and reasoning depth. PhD in Biology required; $80/hr, minimum 17–20 hrs/week, paid onboarding exams, contractor part-time role with remote work worldwide.
Posted Oct 24, 2025
Join OpenTrain AI to evaluate and improve physics-focused AI outputs—paid contract work at $80/hr, part-time (minimum ~17–20 hrs/week). Use your physics degree to spot subtle errors, write step-by-step solutions, and rate model responses with detailed rubrics.
Posted Oct 24, 2025
Evaluate and rate AI-generated mathematical solutions, author exemplar step-by-step answers, and catch subtle conceptual or computational errors; $80/hr, contractor part-time role requiring a BS/MS/PhD in mathematics from a top-100 university and 17–20 hrs/week minimum.
Posted Oct 24, 2025
Part-time contractor role testing and evaluating an internal AI coding tool; $100/hr, remote, under 20 hrs/week. Ideal for intermediate Python engineers with hands-on experience using AI coding assistants like Cursor, Windsurf, or Claude Code.
Posted Oct 17, 2025
OpenTrain AI is hiring a part‑time Frontend UI Developer with 2–4 years' experience in React, Angular, Next.js, or Svelte to build and polish responsive, accessible web interfaces. Remote, 17–20 hrs/week; baseline $10–$30/hr with top candidates paid up to $40–$50/hr.
Posted Oct 6, 2025
Part-time, remote contractor role ($40/hr) designing and running adversarial LLM evaluations and RAG pentests. Requires pentesting experience, Python/Bash/PowerShell skills, container/CI-CD security knowledge, C1 English, and immediate HackerRank + platform assessment.
Posted Oct 6, 2025
Join OpenTrain to audit and improve LLM prompts and model answers on vehicle systems—verify calculations, rate against rubrics, and draft better solutions. Part-time contractor role, $40/hr, under 20 hours/week; requires 3+ years in automotive engineering and practical Python.
Posted Oct 1, 2025
Contractors wanted to mark scene cuts and transitions in ~1,000 YouTube videos (5–10 min each) using uLabel; project runs 4–6 weeks with a preferred team of 10–15 annotators. Pay is $4/hour — applicants must show prior video annotation experience and a QA process.
Posted Sep 14, 2025
Write 50–250-word narrative captions that capture setting, dialogue, actions and emotion for short video clips; Captioner pay $25.75/hr and Senior QC $33.00/hr. USA-based native English speakers only; 20+ hours/week and reliable streaming internet required.
Posted Sep 14, 2025
Annotate guitar fretboards in images using Label Studio — polygon annotations per fret, one polygon/box for the playing surface, and a box/polygon for the nut; exclude the player's hand. Entry-level, remote contractor work; fixed-price $500 for the project.
Posted Sep 8, 2025
Join OpenTrain AI as a part-time contractor applying mathematical statistics with Python (numpy, scipy, statsmodels, pandas) to analyze messy datasets, run hypothesis tests and regressions, and produce clear, reproducible summaries; remote, <20 hrs/week at $25/hr.
Posted Sep 3, 2025
Part-time contractor role building ETL pipelines and interactive dashboards using Python, Plotly/Dash, and SQL. Entry-level, remote work under 20 hrs/week at $25/hr — ideal for hands-on data analysts who document clearly and translate questions into visuals.
Posted Sep 3, 2025
Seeking native Mandarin speakers based in Singapore with C1+ English to evaluate and rate generative AI outputs; 20+ hours/week, contract role paying USD 12/hour. Work reviewing text (and occasional images/video), classifying responses, and flagging safety or factual issues.
Posted Sep 2, 2025
Record ~30 short phone greetings and voicemail clips in your native European language and earn $24–$36; most participants finish in 30–45 minutes. Remote, flexible contractor work for in-country native speakers with a smartphone and local mobile number.
Posted Aug 26, 2025
Entry-level contractor role labeling one target object per image using polygon segmentation in CVAT (SAM may be used with manual correction). Pay is $0.04 per labeled image; work is worldwide and continuous as the dataset (~18,000 images and growing) expands.
Posted Aug 25, 2025
Join OpenTrain AI as a freelance AI code reviewer (20+ hrs/week, $15/hr). Apply for one primary language—Python, JavaScript/TypeScript, Rust, or Ruby—and be sure to state which language you are applying for.
Posted Aug 1, 2025
Join a 3–6 month, fully remote U.S. contract evaluating AI-generated text against elementary ELA standards; Expert annotators (5+ years U.S. classroom experience) and Standard annotators (2+ years) can earn $35/hr with flexible, part-time hours (10+ hrs/week).
Posted Jul 31, 2025
These opportunities are intended for applicants located in Hungary, but the exact work depends on the individual role. A posting may focus on one type of data or combine tasks such as image annotation, video review, audio transcription or recording, response evaluation, search-result assessment, translation, code review, or subject-matter analysis. Read each live posting carefully to understand the work it defines and whether its requirements apply to you.
OpenTrain is the hiring organization for roles available through OpenTrain. Candidates apply through OpenTrain, and successful candidates may be placed or referred to the client whose project they will support. Because each client project can define its own requirements, the individual posting is the source of truth for eligibility, qualifications, experience, pay, hours, schedule, location rules, and other conditions.
