Remote AI training and data labeling jobs in Portugal

Explore remote AI training and data labeling roles that currently accept applicants in Portugal. OpenTrain hires candidates and may place or refer successful applicants to a client project.

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

AI Quality Analyst, Portuguese (Portugal)

Join OpenTrain as a part-time AI Quality Analyst evaluating a conversational AI personalization feature; Portuguese fluency required. Remote, contractor work at $15/hr with a 20+ hour weekly commitment—you'll design personal prompts, compare side-by-side responses, and write defensible rationales.

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Generative AI & RLHF

Text

Remote · Worldwide

Portuguese

Part-time · Flexible

Intermediate level

Hourly · $15/hr

Posted Jul 15, 2026

Finance AI Model Evaluator

Evaluate and improve large language models on real finance tasks — capital markets, trading, M&A, accounting and more. Contract, part-time role (20+ hrs/week) paid $100/hr; English required and open worldwide through OpenTrain.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $100/hr

Posted Jul 15, 2026

AI Quality Analyst — Personalization (German)

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.

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Generative AI & RLHF

Text

Remote · Worldwide

German

Part-time · Flexible

Entry level

Hourly · $15/hr

Posted Jul 15, 2026

English LLM Evaluation Generalist

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $20–$30/hr

Posted Jul 15, 2026

Economics AI Training Expert

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

Computer Science Expert - Golden Responses & Review

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).

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

Biology AI Training Expert (PhD, Remote, $80–90/hr)

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

Physics AI Training Specialist — Remote Contract

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

Math Expert (PhD) — Advanced Math Responses

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

Statistics Expert (PhD) — Remote AI Training Consultant

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $90–$120/hr

Posted Jul 15, 2026

Chemistry PhD AI Training Reviewer

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$90/hr

Posted Jul 15, 2026

German Voice AI Data Rater

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.

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Audio & Speech

Audio

Remote · Worldwide

German

Part-time · Flexible

Entry level

Hourly · $38/hr

Posted Jul 14, 2026

French Voice AI Data Rater

Remote contract role transcribing and rating French voice interactions for a next‑generation AI assistant at $38/hr; requires an Apple Silicon Mac and native/near‑native French. Immediate start; typical 20+ hrs/week with a default 40‑hour commitment over a 3‑week timeline.

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Audio & Speech

Audio

Remote · Worldwide

French, English

Part-time · Flexible

Entry level

Hourly · $38/hr

Posted Jul 14, 2026

Management Consulting AI Evaluation Expert

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $150–$220/hr

Posted Jul 14, 2026

Mechanical Engineering Assessment Writer

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.

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Writing & Editing

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $60–$130/hr

Posted Jul 14, 2026

German Audio Data Reviewer — Speech Annotation & Recording

Remote, contractor role recording, annotating and evaluating German speech to improve AI pronunciation and language understanding; part-time (20+ hrs/week) and paid $30–$65/hr. Native German fluency and phonetics awareness required.

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Audio & Speech

Audio

Remote · Worldwide

German

Part-time · Flexible

Entry level

Hourly · $30–$65/hr

Posted Jul 14, 2026

Electrical Engineering Assessment Reviewer (Graduate Level)

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $40–$130/hr

Posted Jul 14, 2026

High-Energy & Mathematical Physics Expert

Provide authoritative adjudication and written evaluations on contested high-energy and mathematical physics arguments to train next-generation AI. Part-time remote contractor role (under 20 hrs/week), $80–$160/hr, OpenTrain AI hiring.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$160/hr

Posted Jul 14, 2026

French Voice Coach — Remote Part-Time

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.

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Audio & Speech

Audio

Remote · Worldwide

French

Part-time · Flexible

Entry level

Hourly · $30–$65/hr

Posted Jul 14, 2026

Hindi Voice Coach (Remote, Part-Time)

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.

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Audio & Speech

Audio

Remote · Worldwide

Hindi

Part-time · Flexible

Entry level

Hourly · $30–$65/hr

Posted Jul 14, 2026

German Music Audio Evaluation Specialist

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.

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Audio & Speech

Audio

Remote · Worldwide

German, English

Part-time · Flexible

Entry level

Hourly · $32.48–$58.46/hr

Posted Jul 13, 2026

Vietnamese Music AI Evaluation Specialist

Review and annotate Vietnamese AI-generated music—judge lyrics, vocal quality, musicality, creativity, and production, and tag songs with genre, structure, and performance features. Remote contractor role for experienced music producers or audio engineers, 20+ hrs/week, USD $13.01–$23.43/hr; Vietnam

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Audio & Speech

Audio

Remote · Worldwide

Vietnamese, English

Part-time · Flexible

Expert level

Hourly · $13.01–$23.43/hr

Posted Jul 13, 2026

Thai Music AI Model Evaluator

Evaluate AI-generated Thai music—lyrics, vocals, and full mixes—on a flexible part-time contract. Intermediate role (20+ hrs/week) paying $13.01–$23.43/hr; native or near-native Thai and English required.

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Audio & Speech

Audio

Remote · Worldwide

Thai, English

Part-time · Flexible

Intermediate level

Hourly · $13.01–$23.43/hr

Posted Jul 13, 2026

AI Safety Red Teamer (English & Odia)

Join OpenTrain as an AI Safety Red Teamer testing conversational models with jailbreaks, prompt injections, and adversarial attacks. This contract, remote role pays $20–$22/hr, requires native English and Odia, and expects 20+ hours/week.

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Generative AI & RLHF

Text

Remote · Worldwide

English, Odia

Part-time · Flexible

Expert level

Hourly · $20–$22/hr

Posted Jul 13, 2026

Odia AI Response Evaluator

Join OpenTrain AI to evaluate Odia-language model responses and write clear English evaluations that improve LLM behavior. Part-time contractor role (20+ hrs/week), $15–$20/hr — native Odia fluency and strong English writing required.

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Generative AI & RLHF

Text

Remote · Worldwide

Odia, English

Part-time · Flexible

Intermediate level

Hourly · $15–$20/hr

Posted Jul 13, 2026

Telugu AI Response Evaluator

Join OpenTrain AI to evaluate Telugu AI-generated responses and write clear English assessment notes that improve model behavior; remote contract, 20+ hrs/week, $15–$20/hr. Ideal for native Telugu speakers with strong English writing and LLM experience.

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Generative AI & RLHF

Text

Remote · Worldwide

Telugu, English

Part-time · Flexible

Intermediate level

Hourly · $15–$20/hr

Posted Jul 13, 2026

Urdu AI Response Evaluator (Remote, $15–$20/hr)

Evaluate Urdu AI-generated responses for factual accuracy, clarity, tone, and reasoning, and write clear English analyses that guide model improvement. Remote contractor role, 20+ hours/week, $15–$20 per hour.

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Generative AI & RLHF

Text

Remote · Worldwide

Urdu, English

Part-time · Flexible

Intermediate level

Hourly · $15–$20/hr

Posted Jul 13, 2026

Bengali AI Response Evaluator

Join OpenTrain as a remote Bengali AI Response Evaluator to review and rate Bengali LLM outputs, provide detailed English feedback, and help improve model behavior; part-time contract work, flexible hours, $15–$20/hr.

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Generative AI & RLHF

Text

Remote · Worldwide

Bangla, English

Part-time · Flexible

Entry level

Hourly · $15–$20/hr

Posted Jul 13, 2026

Marketing Work Evaluation Expert

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.

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Generative AI & RLHF

Text

Remote · Worldwide

English

Part-time · Flexible

Entry level

Hourly · $80–$150/hr

Posted Jul 13, 2026

Accounting Evaluation Specialist

Evaluate AI-generated and human accounting deliverables—score reconciliations, financial statements, disclosures, workpapers and technical memos with clear, evidence-based justifications. Expert US GAAP and audit experience required; contract, part-time, remote, 20+ hrs/week, $130–$160/hr.

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Legal & Finance

Document

Remote · Worldwide

English

Part-time · Flexible

Expert level

Hourly · $130–$160/hr

Posted Jul 13, 2026