This collection highlights remote AI training and data-labeling roles that explicitly accept applicants located in Portugal. The kinds of human work on these postings can include annotating images or video, transcribing audio, rating model outputs, translating text, or applying subject-matter review, inspect each listing for exact tasks and requirements. OpenTrain is the hiring organization for the roles presented here and may place or refer successful candidates to the client whose project they will support; candidates apply through OpenTrain. Individual postings are the authoritative source for eligibility, hours, pay, languages, and other project rules.
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
Help shape LLMs for finance by evaluating model outputs, building rubrics, and advising on training strategies—remote, contractor work at $100/hr for 20+ hours/week. Join OpenTrain to apply finance expertise to next-generation AI.
Posted Jul 16, 2026
Design and solve challenging physics problems and write step-by-step solutions to probe and evaluate large language models across undergraduate to PhD topics. Remote, part-time contract (~20+ hrs/week); requires strong physics foundations and Python scientific-computing skills.
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
Join OpenTrain as a Portuguese AI Personalization Quality Analyst evaluating personalized generative responses using your own conversation context — remote, contractor, 20+ hrs/week at $15/hr. Create multi-turn prompts, compare model outputs, and write precise rationales to improve grounding and hel
Posted Jul 16, 2026
Work remotely as a bilingual (Russian/English) AI analyst creating summaries, validating claims, and solving analytical puzzles to improve large language models; entry-level, 20+ hours/week, contractor/part-time work through OpenTrain.
Posted Jul 16, 2026
Join OpenTrain AI as a Finnish-language analyst helping fine-tune LLM reasoning: read and deconstruct Finnish text, verify facts via web research, and create analytical training scenarios. Remote, contractor role for a short-term 1-month assignment with up to 40 hrs/week and US Pacific overlap.
Posted Jul 16, 2026
Join OpenTrain AI to evaluate LLM outputs in finance, design rubrics, and help shape model training and benchmarks. Part-time contractor role (<20 hrs/week), remote worldwide, paying $100/hr for finance professionals with 2+ years' experience.
Posted Jul 16, 2026
Join OpenTrain to train large language models by solving, researching, and writing clear step-by-step math and logic explanations; remote contractor role with a minimum 20 hours/week and a 1-month contract. Ideal for strong math communicators who enjoy structured problem solving.
Posted Jul 16, 2026
Join OpenTrain AI to evaluate AI-generated civil legal analyses focused on housing, family, consumer, foreclosure, and debt matters; provide structured written feedback to improve legal AI reasoning. Remote contract role for U.S.-bar attorneys, 20+ hours/week at $170/hr.
Posted Jul 16, 2026
Join OpenTrain as a remote Funds Contract Redlining Attorney to train and evaluate legal AI by running redlines, simulated negotiations, and grading model outputs. Part-time contractor role (20+ hrs/week) paying $90–$130/hr; J.D. and active U.S. bar required.
Posted Jul 16, 2026
Create multi-turn conversations, rubrics, and evaluation assets for frontier LLMs while working remotely as a contractor 20+ hours/week. Rapid onboarding and clear specs; paid on a per-task/hour basis at $20–$30/hr.
Posted Jul 16, 2026
Join OpenTrain as a remote LLM Red-Teamer to design adversarial multi-turn conversations, write rigorous evaluation rubrics, and validate frontier language models 20+ hrs/week for $40–$65/hr. Prior RLHF or evaluation experience is helpful but not required.
Posted Jul 16, 2026
OpenTrain is hiring a Hindi Audio Engineer to edit, mix, master and quality-review Hindi audio for AI training projects; flexible contractor work under 20 hrs/week, paid $20–$30/hr. Native or near-native Hindi required.
Posted Jul 16, 2026
Record expressive Spanish (Mexico) voice performances for AI training, delivering production-ready audio from your home studio; paid up to $65/hr for 20+ hours/week. Join OpenTrain to help shape how speech AI understands tone, emotion, and natural conversation.
Posted Jul 16, 2026
Join OpenTrain as a part-time Video Content Data Labeling Associate to annotate short first-person household-task videos (classification and object detection). Entry-level friendly, remote worldwide, $10–$12/hr for 20+ hours/week.
Posted Jul 16, 2026
Evaluate LLM outputs on complex finance tasks, craft domain-specific rubrics, and help improve AI training and benchmarking. Remote, flexible contract work (10–30 hrs/week) with competitive pay around $100+/hr.
Posted Jul 15, 2026
Roles that accept applicants located in Portugal support the human steps needed to develop and evaluate AI systems. Typical task types described in postings include image and video annotation, audio transcription and labeling, text rating and classification, translation, and specialist review when subject expertise is required.
Each live posting specifies the exact mix of tasks, the expected outputs, and the tools or interfaces you will use. Read the posting closely to understand what the role requires day to day.
Useful skills include attention to detail, clear written communication, language fluency where required, and consistent application of guidelines and examples. Subject-matter knowledge can be valuable for niche projects but is not always required.
Use this section to compare your strengths with the task types described in live postings before applying.
Individual listings control eligibility, qualifications, hours, pay, schedule, and any location rules. Confirm whether the posting accepts applicants located in Portugal, what language skills are required, and the precise tasks and deliverables before applying.
The live posting is the authoritative source for project-specific rules and will state any conditions that affect your ability to participate.
OpenTrain is the hiring organization for the roles shown here and may place or refer successful candidates to the client whose project they will support. Candidates apply through OpenTrain; the live posting lists the specifics of that role.
Use the posting to understand eligibility and terms, and remember that OpenTrain manages the application process for roles that accept applicants located in Portugal.
