https://aitrainers.jobs/ai-training-jobs/country/ptRemote AI training work you can do from Portugal: roles that accept residents of Portugal, plus roles open worldwide. Most are paid hourly in US dollars.en Wed, 21 Oct 2026 01:06:02 GMT https://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcriptionist-ai-training-1qzy3jhttps://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcriptionist-ai-training-1qzy3jTue, 13 Oct 2026 00:00:04 GMTTranscribe spoken Brazilian Portuguese verbatim, separating speakers and handling filled pauses and informal speech under a style guide. Suits native Brazilian Portuguese speakers with quick typing and sharp listening skills who want independent, self-scheduled work. https://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcript-editor-ai-training-qx8oufhttps://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcript-editor-ai-training-qx8oufTue, 13 Oct 2026 00:00:04 GMTReview and correct Brazilian Portuguese audio transcripts for word accuracy, punctuation and timing against recordings. Suits native or near-native Brazilian Portuguese speakers in Lisbon or elsewhere in Portugal who are detail-focused and comfortable working alone. https://aitrainers.jobs/jobs/legal-annotators-portuguese-portugal-h206zohttps://aitrainers.jobs/jobs/legal-annotators-portuguese-portugal-h206zoWed, 16 Sep 2026 19:50:44 GMTRWS TrainAI · Portugal · $23/hr https://aitrainers.jobs/jobs/audiobook-qa-expert-portuguese-portugal-1sepy0https://aitrainers.jobs/jobs/audiobook-qa-expert-portuguese-portugal-1sepy0Mon, 14 Sep 2026 20:03:53 GMTNative European Portuguese speakers who listen to audiobooks regularly log errors in AI-narrated audiobooks, including misread numbers and awkward intonation. Suits detail-minded listeners who can sustain long review sessions. https://aitrainers.jobs/jobs/chemistry-expert-portugal-yede17https://aitrainers.jobs/jobs/chemistry-expert-portugal-yede17Thu, 06 Aug 2026 11:34:48 GMTPart-time remote work building chemistry challenges that require computational rigour and documented solutions. Suits chemists with a graduate degree and research or industry modelling experience. https://aitrainers.jobs/jobs/biology-expert-ai-trainer-portugal-117vorhttps://aitrainers.jobs/jobs/biology-expert-ai-trainer-portugal-117vorTue, 04 Aug 2026 13:14:06 GMTRemote part-time work writing deterministic biology challenges with one correct answer for AI model evaluation. Suits life scientists with a graduate degree and an interest in computational analysis. https://aitrainers.jobs/jobs/ai-evaluation-annotation-reviewer-l3-advanced-level-portuguese-rtl2h7https://aitrainers.jobs/jobs/ai-evaluation-annotation-reviewer-l3-advanced-level-portuguese-rtl2h7Thu, 23 Jul 2026 00:00:00 GMTReviews AI-generated Portuguese responses for accuracy and clarity, and annotates language data to detailed guidelines. Suits fluent Portuguese speakers with a linguistics, translation or QA background who can commit to six months. https://aitrainers.jobs/jobs/mathematics-expert-portugal-1gt79ghttps://aitrainers.jobs/jobs/mathematics-expert-portugal-1gt79gFri, 19 Jun 2026 21:11:48 GMTRemote contract work designing rigorous, single-answer math problems with complete solutions to test and train frontier AI reasoning. Suits mathematicians with advanced degrees who write precisely and enjoy building original problems. https://aitrainers.jobs/jobs/physics-expert-ai-trainer-portugal-17jdr9https://aitrainers.jobs/jobs/physics-expert-ai-trainer-portugal-17jdr9Thu, 18 Jun 2026 21:51:30 GMTRemote contract work designing rigorous, single-answer physics problems with complete worked solutions for AI training. Suits physicists with research or industry experience who write precisely and enjoy building original multi-step problems. https://aitrainers.jobs/jobs/circinus-audio-contributor-portuguese-portugal-nzqvm3https://aitrainers.jobs/jobs/circinus-audio-contributor-portuguese-portugal-nzqvm3Thu, 18 Jun 2026 09:14:10 GMTRemote freelance job recording about 20 short scripted prompts in Portuguese for voice AI, submitted by a deadline. Suits clear-speaking native Portuguese speakers with a laptop and a quiet indoor space. https://aitrainers.jobs/jobs/language-data-quality-reviewer-for-swedish-transcriptionist-freelance-j4qnk3https://aitrainers.jobs/jobs/language-data-quality-reviewer-for-swedish-transcriptionist-freelance-j4qnk3Mon, 11 May 2026 00:00:00 GMTFreelance, task-based Swedish language data review covering labeling, transcription and translation. Suits Swedish-English speakers with a data, QA or technology background who can handle sporadic work. https://aitrainers.jobs/jobs/full-stack-developer-ai-trainer-portugal-1nyq1nhttps://aitrainers.jobs/jobs/full-stack-developer-ai-trainer-portugal-1nyq1nMon, 04 May 2026 21:06:26 GMTRemote project-based work creating coding tasks, reference solutions and tests to train AI models. Suits experienced software engineers who can debug large codebases and give structured peer feedback. https://aitrainers.jobs/jobs/language-alignment-resource-partner-portuguese-freelance-ai-trainer-pr-11e8krhttps://aitrainers.jobs/jobs/language-alignment-resource-partner-portuguese-freelance-ai-trainer-pr-11e8krSun, 05 Apr 2026 19:58:23 GMTFreelance QA role for native Portuguese speakers to review AI-generated text for grammar, naturalness and cultural fit. It suits linguists or educators with prior annotation experience who can turn quality trends into clear guidance. https://aitrainers.jobs/jobs/project-lion-senior-prompt-engineer-portugal-remote-part-time-1n944khttps://aitrainers.jobs/jobs/project-lion-senior-prompt-engineer-portugal-remote-part-time-1n944kMon, 16 Mar 2026 07:32:37 GMTDesigns, tests and refines prompts for LLM autoraters, measuring them against gold data and human ratings. Suits senior prompt engineers based in Portugal with four or more years of LLM work and fluent English. https://aitrainers.jobs/jobs/nortenho-dialect-specialist-freelance-ai-trainer-project-qb5vywhttps://aitrainers.jobs/jobs/nortenho-dialect-specialist-freelance-ai-trainer-project-qb5vywFri, 13 Mar 2026 21:23:36 GMTFreelance role for Nortenho speakers to test AI models on grammar and dialect questions and document failure modes. It suits people with native fluency and teaching, translation or community linguistics experience who explain their reasoning clearly. https://aitrainers.jobs/jobs/alentejano-dialect-specialist-freelance-ai-trainer-project-21lsl4https://aitrainers.jobs/jobs/alentejano-dialect-specialist-freelance-ai-trainer-project-21lsl4Fri, 13 Mar 2026 21:20:02 GMTRemote evaluation of AI output in the Alentejano dialect of Portuguese, checking grammar, morphology and register with written error notes. Suits native speakers with linguistics, teaching or community language experience. https://aitrainers.jobs/jobs/econometrics-instructor-wwe19ghttps://aitrainers.jobs/jobs/econometrics-instructor-wwe19gTue, 03 Mar 2026 20:10:35 GMTYou validate AI-generated econometric questions, models and explanations, checking assumptions, methods and interpretation of results. It suits experienced econometrics teachers and quantitative economists who can give precise written feedback on their own time. https://aitrainers.jobs/jobs/forestry-and-land-management-scientist-ai-training-1egtqhhttps://aitrainers.jobs/jobs/forestry-and-land-management-scientist-ai-training-1egtqhTue, 03 Mar 2026 20:10:35 GMTYou check AI-generated forestry and land management scenarios for scientific accuracy and practical soundness. It suits forestry or natural resources professionals who are comfortable writing detailed technical feedback on their own schedule. https://aitrainers.jobs/jobs/natural-resource-conservation-scientist-1z8xashttps://aitrainers.jobs/jobs/natural-resource-conservation-scientist-1z8xasTue, 03 Mar 2026 20:10:35 GMTYou assess AI outputs on ecosystems, land management and biodiversity against real conservation practice and standards. It suits natural resource and environmental professionals who can write detailed feedback and manage their own workflow. https://aitrainers.jobs/jobs/portuguese-language-expert-rtdjqyhttps://aitrainers.jobs/jobs/portuguese-language-expert-rtdjqyTue, 03 Mar 2026 20:10:35 GMTAlignerr · 3 countries · $20–40/hr https://aitrainers.jobs/jobs/portuguese-localization-specialist-1itseghttps://aitrainers.jobs/jobs/portuguese-localization-specialist-1itsegTue, 03 Mar 2026 20:10:35 GMTNative Portuguese speakers review AI-generated Portuguese text and translations for accuracy, naturalness and cultural fit. Suits fluent speakers familiar with Brazilian or European Portuguese conventions. https://aitrainers.jobs/jobs/ai-language-expert-french-1vel5phttps://aitrainers.jobs/jobs/ai-language-expert-french-1vel5pTue, 03 Mar 2026 20:10:35 GMTEvaluate AI-generated French speech and text for accuracy and educational quality, and assess learner work across CEFR levels. Suits native French speakers with teaching or learner-assessment experience who work asynchronously. https://aitrainers.jobs/jobs/ai-language-expert-portuguese-1by49mhttps://aitrainers.jobs/jobs/ai-language-expert-portuguese-1by49mTue, 03 Mar 2026 20:10:35 GMTReview AI-generated Portuguese speech and text for accuracy and cultural fit, and give structured feedback on learner writing. Suits native Portuguese speakers with a teaching or language-assessment background who can commit at least 15 hours a week. https://aitrainers.jobs/jobs/science-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer--qh547khttps://aitrainers.jobs/jobs/science-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer--qh547kMon, 16 Jun 2025 20:52:53 GMTEuropean Portuguese science specialists test an AI model on physical, earth and environmental science, recording each factual or logical error. Suits science graduates with teaching, research or science-communication experience who write fluently in European Portuguese. https://aitrainers.jobs/jobs/coding-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer-p-cuvofihttps://aitrainers.jobs/jobs/coding-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer-p-cuvofiSat, 14 Jun 2025 01:37:52 GMTTest an AI model's software engineering answers in European Portuguese, verifying logic and recording reproducible errors. Suits programmers who write fluent European Portuguese and can explain why an answer fails. https://aitrainers.jobs/jobs/stem-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer-pro-on75llhttps://aitrainers.jobs/jobs/stem-specialist-fluent-in-portuguese-portugal-freelance-ai-trainer-pro-on75llSat, 14 Jun 2025 01:37:48 GMTEuropean Portuguese-fluent STEM specialists test a model on maths, physics and engineering problems and log each reasoning error. It suits STEM graduates who can explain their working step by step in European Portuguese. https://aitrainers.jobs/jobs/mathematics-specialist-fluent-in-portuguese-portugal-freelance-ai-trai-kz3uxchttps://aitrainers.jobs/jobs/mathematics-specialist-fluent-in-portuguese-portugal-freelance-ai-trai-kz3uxcSat, 14 Jun 2025 01:37:41 GMTFreelance role for mathematics experts fluent in Portuguese to test AI models on math questions and proofs and document failure modes. It suits people with publications, teaching or research experience in mathematics who explain their reasoning clearly. https://aitrainers.jobs/jobs/portuguese-language-specialist-portugal-freelance-ai-trainer-project-1k1cd6https://aitrainers.jobs/jobs/portuguese-language-specialist-portugal-freelance-ai-trainer-project-1k1cd6Thu, 12 Jun 2025 23:40:56 GMTEuropean Portuguese specialists test an AI model on grammar, agreement and colloquial usage, documenting each failure for the engineering team. Suits linguists or language researchers with graduate training or analysis experience in European Portuguese. https://aitrainers.jobs/jobs/search-engine-evaluator-portuguese-portugal-f8wgiahttps://aitrainers.jobs/jobs/search-engine-evaluator-portuguese-portugal-f8wgiaMon, 14 Oct 2024 14:37:36 GMTRWS TrainAI · Portugal · Up to €8/hr https://aitrainers.jobs/jobs/cfd-engineer-ai-trainer-diouhxhttps://aitrainers.jobs/jobs/cfd-engineer-ai-trainer-diouhxTue, 20 Oct 2026 00:00:00 GMTMindrift · 16 countries · Up to $31/hr https://aitrainers.jobs/jobs/freelance-mechanical-cfd-engineer-ai-trainer-19y4ryhttps://aitrainers.jobs/jobs/freelance-mechanical-cfd-engineer-ai-trainer-19y4ryTue, 20 Oct 2026 00:00:00 GMTMindrift · 16 countries · Up to $31/hr https://aitrainers.jobs/jobs/security-software-engineer-python-ai-evaluation-1s8uhkhttps://aitrainers.jobs/jobs/security-software-engineer-python-ai-evaluation-1s8uhkMon, 19 Oct 2026 18:21:57 GMTContract work evaluating AI models on security coding tasks such as vulnerability analysis and patch validation. Suits experienced software engineers with hands-on security work who write clear technical feedback. https://aitrainers.jobs/jobs/senior-application-security-engineer-ai-code-evaluation-v8hg40https://aitrainers.jobs/jobs/senior-application-security-engineer-ai-code-evaluation-v8hg40Mon, 19 Oct 2026 18:21:52 GMTContract work evaluating AI models on security coding tasks such as vulnerability analysis and patch validation. Suits senior application security engineers who can write clear, structured technical feedback. https://aitrainers.jobs/jobs/cad-engineer-ai-trainer-sjzoechttps://aitrainers.jobs/jobs/cad-engineer-ai-trainer-sjzoecMon, 19 Oct 2026 00:00:00 GMTMindrift · 10 countries · Up to $31/hr https://aitrainers.jobs/jobs/freelance-mechanical-cad-simulation-engineer-ai-trainer-1bba0fhttps://aitrainers.jobs/jobs/freelance-mechanical-cad-simulation-engineer-ai-trainer-1bba0fMon, 19 Oct 2026 00:00:00 GMTMindrift · 15 countries · Up to $31/hr https://aitrainers.jobs/jobs/aerodynamics-expert-msc-or-phd-14ldrqhttps://aitrainers.jobs/jobs/aerodynamics-expert-msc-or-phd-14ldrqFri, 16 Oct 2026 00:00:00 GMTAerodynamics specialists set up CFD cases with Python-driven tooling, run simulations and judge whether flow results are physically valid. Suits aerospace or mechanical engineers with fluid dynamics expertise who can justify modeling choices. https://aitrainers.jobs/jobs/physionet-competitor-biomedical-signal-processing-ml-1ppepthttps://aitrainers.jobs/jobs/physionet-competitor-biomedical-signal-processing-ml-1ppeptFri, 16 Oct 2026 00:00:00 GMTCompetition specialists build rigorous biomedical signal problems and write reference solutions in Python or MATLAB. Suits people with PhysioNet-style competition experience and hands-on work with physiological signals such as ECG or EEG. https://aitrainers.jobs/jobs/stem-expert-msc-phd-1quhichttps://aitrainers.jobs/jobs/stem-expert-msc-phd-1quhicFri, 16 Oct 2026 00:00:00 GMTDomain scientists solve and review challenging STEM problems and use Python to test whether AI-generated answers are correct. Suits chemistry, biology, math, physics or geoscience experts comfortable with coding agents and scientific Python. https://aitrainers.jobs/jobs/ml-engineer-msc-or-phd-afg4v7https://aitrainers.jobs/jobs/ml-engineer-msc-or-phd-afg4v7Fri, 16 Oct 2026 00:00:00 GMTML engineers implement and validate models, training pipelines and inference systems, then debug numerical and performance failures. Suits master's or PhD-level practitioners with strong Python skills and experience using coding agents. https://aitrainers.jobs/jobs/puzzle-solver-coding-1nu504https://aitrainers.jobs/jobs/puzzle-solver-coding-1nu504Fri, 16 Oct 2026 00:00:00 GMTCompetitive programmers solve self-contained coding and logic challenges and verify solutions against explicit and hidden constraints. Suits experienced problem solvers with a verifiable Codeforces record who reason carefully about edge cases. https://aitrainers.jobs/jobs/mechanical-engineering-expert-msc-or-phd-35ecemhttps://aitrainers.jobs/jobs/mechanical-engineering-expert-msc-or-phd-35ecemFri, 16 Oct 2026 00:00:00 GMTMechanical engineers translate physical requirements into simulations and check whether AI-generated engineering analyses are valid. Suits practitioners with mechanical engineering training or applied mechanics expertise who work with coding agents. https://aitrainers.jobs/jobs/hardware-expert-msc-or-phd-19m3sqhttps://aitrainers.jobs/jobs/hardware-expert-msc-or-phd-19m3sqFri, 16 Oct 2026 00:00:00 GMTHardware engineers create rigorous engineering problems and verify reference solutions with calculations, simulations and test tools. Suits engineers who have taken products, models or test systems to production or diagnosed hard failures. https://aitrainers.jobs/jobs/stem-expert-chemistry-computational-chemistry-phd-33qt03https://aitrainers.jobs/jobs/stem-expert-chemistry-computational-chemistry-phd-33qt03Fri, 16 Oct 2026 00:00:00 GMTChemists design, critique and validate chemistry problems, workflows and reasoning, including reaction mechanisms and simulations. Suits PhD-level chemists with lab or simulation-heavy research experience who document methods clearly. https://aitrainers.jobs/jobs/stem-expert-biology-bioinformatics-phd-y2kcjphttps://aitrainers.jobs/jobs/stem-expert-biology-bioinformatics-phd-y2kcjpFri, 16 Oct 2026 00:00:00 GMTBiologists and bioinformaticians review analysis pipelines and assess biological reasoning in AI outputs. Suits PhD-level specialists with hands-on experience analyzing real biological data in Python or R. https://aitrainers.jobs/jobs/computational-chemistry-structural-biology-drug-discovery-scientist-ph-vgqucphttps://aitrainers.jobs/jobs/computational-chemistry-structural-biology-drug-discovery-scientist-ph-vgqucpThu, 15 Oct 2026 00:00:00 GMTPhD scientists in computational chemistry, structural biology and drug discovery are invited to write expert-level problems and evaluate AI reasoning in their field. Suits researchers with publication records who can explain their reasoning clearly in writing. https://aitrainers.jobs/jobs/computational-biology-bioinformatics-expert-phd-1f777khttps://aitrainers.jobs/jobs/computational-biology-bioinformatics-expert-phd-1f777kThu, 15 Oct 2026 00:00:00 GMTReviews genomics and bioinformatics pipelines, statistical methods and tool settings to benchmark biology AI systems. Suits PhD-level computational biologists who document reproducible workflows and explain them to non-specialists. https://aitrainers.jobs/jobs/bilingual-medical-doctor-korean-1276olhttps://aitrainers.jobs/jobs/bilingual-medical-doctor-korean-1276olWed, 14 Oct 2026 00:00:00 GMTAnnotates clinical cases and reviews AI-written medical content in Korean and English for clinical accuracy. Suits physicians with recent clinical practice who can explain medical reasoning clearly in both languages. https://aitrainers.jobs/jobs/bilingual-medical-doctor-japanese-1ugc2rhttps://aitrainers.jobs/jobs/bilingual-medical-doctor-japanese-1ugc2rWed, 14 Oct 2026 00:00:00 GMTAnnotates clinical cases and reviews AI-written medical content in Japanese and English for clinical accuracy. Suits physicians with recent clinical practice who can explain medical reasoning clearly in both languages. https://aitrainers.jobs/jobs/software-engineer-open-source-contributor-fzwqsghttps://aitrainers.jobs/jobs/software-engineer-open-source-contributor-fzwqsgWed, 14 Oct 2026 00:00:00 GMTWrites reproducible coding tasks with reference fixes and deterministic checks that test whether AI can fix bugs and add features. Suits software engineers with public open-source work who can write careful, independent solutions. https://aitrainers.jobs/jobs/software-engineer-github-contributor-1ka9bshttps://aitrainers.jobs/jobs/software-engineer-github-contributor-1ka9bsWed, 14 Oct 2026 00:00:00 GMTWrites reproducible coding tasks with reference fixes and deterministic checks that test whether AI can fix bugs and add features. Suits software engineers with a visible GitHub record who can write careful, independent solutions.