https://aitrainers.jobs/ai-training-jobs/country/brRemote AI training work you can do from Brazil: roles that accept residents of Brazil, plus roles open worldwide. Most are paid hourly in US dollars.en Tue, 03 Nov 2026 04:06:42 GMT https://aitrainers.jobs/jobs/portuguese-bilingual-expert-brazil-18hmoehttps://aitrainers.jobs/jobs/portuguese-bilingual-expert-brazil-18hmoeSat, 31 Oct 2026 00:00:00 GMTListens to Brazilian Portuguese audio and assesses the nativeness, pronunciation and intonation of speech, with written justifications in English. Suits native Brazilian Portuguese speakers with a background in linguistics, audio or media. https://aitrainers.jobs/jobs/ai-security-testing-analyst-16ex9zhttps://aitrainers.jobs/jobs/ai-security-testing-analyst-16ex9zFri, 30 Oct 2026 00:00:02 GMTProbes AI systems with adversarial prompts and edge cases to find guardrail failures, then documents them in structured reports. Suits security-minded people with some LLM or AI experience who work well asynchronously. https://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcriptionist-ai-training-1qzy3jhttps://aitrainers.jobs/jobs/brazilian-portuguese-audio-transcriptionist-ai-training-1qzy3jThu, 29 Oct 2026 00:00:02 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/audio-transcript-editor-portuguese-brasileiro-ai-training-3y98p9https://aitrainers.jobs/jobs/audio-transcript-editor-portuguese-brasileiro-ai-training-3y98p9Thu, 29 Oct 2026 00:00:02 GMTClean up machine-generated Brazilian Portuguese transcripts by checking them against audio and fixing words, punctuation and timestamps. Suits native Brazilian Portuguese speakers in Sao Paulo or across Brazil who have a precise ear and a passion for accuracy. https://aitrainers.jobs/jobs/revenue-operations-task-author-ai-training-176khwhttps://aitrainers.jobs/jobs/revenue-operations-task-author-ai-training-176khwTue, 27 Oct 2026 00:00:01 GMTDesign revenue operations tasks that require reconciling CRM, bookings and order data into one defensible answer, with gradable rubrics. Suits experienced RevOps and SalesOps professionals in Sao Paulo or across Brazil who know Salesforce and revenue recognition. https://aitrainers.jobs/jobs/senior-software-engineer-ai-training-brazil-r8biydhttps://aitrainers.jobs/jobs/senior-software-engineer-ai-training-brazil-r8biydMon, 26 Oct 2026 23:34:45 GMTSenior software engineers judge how AI coding agents reason and respond to real development work, writing detailed feedback and short video walkthroughs. It suits experienced engineers with strong English who already use tools such as Claude Code or Cursor. https://aitrainers.jobs/jobs/especialista-em-transcricao-de-audio-japones-geqik2https://aitrainers.jobs/jobs/especialista-em-transcricao-de-audio-japones-geqik2Mon, 26 Oct 2026 00:00:00 GMTTranscribe spoken Japanese recordings verbatim, labelling speakers and capturing fillers, overlaps and non-standard speech. Suits native or near-native Japanese speakers in Brazil, including Nikkei heritage speakers, who write kanji and kana accurately. https://aitrainers.jobs/jobs/mathematician-formal-proof-ai-foundations-remote-contract-29ap9bhttps://aitrainers.jobs/jobs/mathematician-formal-proof-ai-foundations-remote-contract-29ap9bThu, 22 Oct 2026 00:00:01 GMTWrite and check Lean 4 formal proofs of advanced theorems, including contributions to large libraries such as mathlib. Suits mathematicians in Brazil with a Master's or PhD who enjoy rigorous, machine-verifiable proof work. https://aitrainers.jobs/jobs/especialista-em-fisica-ai-content-specialist-5esyayhttps://aitrainers.jobs/jobs/especialista-em-fisica-ai-content-specialist-5esyayThu, 22 Oct 2026 00:00:01 GMTDesign challenging physics questions and clear solutions, then assess AI responses for accuracy and quality of explanation. Suits Master's-level physicists in Brazil who communicate complex ideas clearly in English and work independently. https://aitrainers.jobs/jobs/engenheiro-a-de-software-treinamento-de-ia-j8z2bphttps://aitrainers.jobs/jobs/engenheiro-a-de-software-treinamento-de-ia-j8z2bpWed, 21 Oct 2026 00:00:01 GMTWrite, debug and evaluate code produced by AI, identifying bugs, security issues and performance bottlenecks. Suits software engineers in Brasilia who explain technical reasoning clearly and value autonomy. https://aitrainers.jobs/jobs/engenheiro-de-software-treinamento-de-ia-xjrdtvhttps://aitrainers.jobs/jobs/engenheiro-de-software-treinamento-de-ia-xjrdtvWed, 21 Oct 2026 00:00:01 GMTWrite and review code, and assess AI-generated solutions for correctness, readability and security issues. Suits software engineers in Manaus who can explain their reasoning clearly and prefer self-scheduled remote work. https://aitrainers.jobs/jobs/chemistry-master-s-and-phds-paid-expert-contributions-waz2johttps://aitrainers.jobs/jobs/chemistry-master-s-and-phds-paid-expert-contributions-waz2joSun, 18 Oct 2026 01:18:58 GMTAnswers detailed chemistry questions and reviews chemical data in remote, asynchronous tasks for an ongoing expert initiative. Suits chemists with a master's or PhD who can explain technical concepts clearly in writing. https://aitrainers.jobs/jobs/quality-evaluator-fluent-english-brazil-1fndm9https://aitrainers.jobs/jobs/quality-evaluator-fluent-english-brazil-1fndm9Fri, 16 Oct 2026 02:27:21 GMTRemote part-time work comparing chatbot responses across many topics and writing evaluation rationales. Suits fluent English writers with critical judgment and experience using AI models daily. https://aitrainers.jobs/jobs/freelance-graphic-designer-ai-training-2j5z82https://aitrainers.jobs/jobs/freelance-graphic-designer-ai-training-2j5z82Wed, 14 Oct 2026 22:23:53 GMTFreelance remote work rating and fixing design samples against detailed rubrics for AI training. Suits graphic designers and marketers with a design education and a sharp eye for detail. https://aitrainers.jobs/jobs/quality-control-specialist-for-ai-ml-with-portuguese-brazil-language-2pu0lthttps://aitrainers.jobs/jobs/quality-control-specialist-for-ai-ml-with-portuguese-brazil-language-2pu0ltTue, 13 Oct 2026 10:16:56 GMTReviews finished speech transcripts for accuracy, punctuation, capitalization and number formatting against project guidelines. Suits detail-focused native speakers with strong written skills who can work independently to deadlines. https://aitrainers.jobs/jobs/audio-transcription-specialist-portuguese-brazil-language-5lkpnbhttps://aitrainers.jobs/jobs/audio-transcription-specialist-portuguese-brazil-language-5lkpnbTue, 13 Oct 2026 09:28:45 GMTListens to recorded Brazilian Portuguese conversations and transcribes them accurately to project guidelines, correcting errors where needed. Suits people with strong Brazilian Portuguese listening and typing skills and B2-level English who can meet deadlines. https://aitrainers.jobs/jobs/voice-talent-required-arabic-female-remote-h347obhttps://aitrainers.jobs/jobs/voice-talent-required-arabic-female-remote-h347obFri, 09 Oct 2026 15:32:26 GMTRecords natural, mature-sounding Arabic female voice samples for conversational AI and text-to-speech training. Suits native speakers with voice acting or narration experience and a home recording setup. https://aitrainers.jobs/jobs/voice-talent-required-portuguese-female-remote-dynd69https://aitrainers.jobs/jobs/voice-talent-required-portuguese-female-remote-dynd69Fri, 09 Oct 2026 15:31:08 GMTRecords natural, mature-sounding Portuguese female voice samples for conversational AI and text-to-speech training. Suits native speakers with voice acting or narration experience and a home recording setup. https://aitrainers.jobs/jobs/python-developer-remote-in-brazil-ihwgc7https://aitrainers.jobs/jobs/python-developer-remote-in-brazil-ihwgc7Tue, 06 Oct 2026 21:13:34 GMTRemote project consulting on Python engineering work such as debugging, refactoring and migrations for AI model training. Suits engineers with a few years of professional experience who want to set their own schedule. https://aitrainers.jobs/jobs/remote-audio-tasks-polish-language-1bgup4https://aitrainers.jobs/jobs/remote-audio-tasks-polish-language-1bgup4Thu, 01 Oct 2026 17:27:49 GMTRead short scripts in Polish and record them for a remote speech dataset. Suits fluent native speakers with a quiet space and a smartphone who want self-paced part-time tasks. https://aitrainers.jobs/jobs/backend-developer-brazil-sew0syhttps://aitrainers.jobs/jobs/backend-developer-brazil-sew0syMon, 14 Sep 2026 15:01:47 GMTPart-time remote contract work on backend engineering tasks, including bug fixing, refactoring and test design. Suits experienced backend developers who are comfortable with large, multi-file codebases. https://aitrainers.jobs/jobs/audiobook-qa-expert-portuguese-brazil-1uuayzhttps://aitrainers.jobs/jobs/audiobook-qa-expert-portuguese-brazil-1uuayzMon, 14 Sep 2026 21:03:41 GMTNative Brazilian Portuguese speakers who listen to audiobooks regularly log errors in AI-narrated audiobooks, including skipped words and wrongly expanded abbreviations. Suits detail-minded listeners who can sustain long review sessions. https://aitrainers.jobs/jobs/hydrus-session-director-portuguese-br-v2-15cnynhttps://aitrainers.jobs/jobs/hydrus-session-director-portuguese-br-v2-15cnynFri, 11 Sep 2026 06:49:01 GMTDirects scripted conversational voice sessions in Brazilian Portuguese, coaching performers toward natural delivery and correcting audio issues live. Suits native Brazilian Portuguese speakers with voice, audio or theatre direction experience. https://aitrainers.jobs/jobs/ai-benchmark-engineer-native-language-specialist-portuguese-brazil-rem-nzhwb0https://aitrainers.jobs/jobs/ai-benchmark-engineer-native-language-specialist-portuguese-brazil-rem-nzhwb0Tue, 08 Sep 2026 13:00:44 GMTBuilds coding benchmark tasks in Brazilian Portuguese for terminal workflows and validates them with deterministic verifier scripts. Suits native-speaking software engineers with Python, shell and CLI experience. https://aitrainers.jobs/jobs/business-financial-decision-maker-brazil-1hb2ynhttps://aitrainers.jobs/jobs/business-financial-decision-maker-brazil-1hb2ynTue, 18 Aug 2026 01:28:48 GMTA one-time, roughly 25-minute remote survey on business banking and financial decisions for Brazilian companies that use Itaú. It suits people who personally execute payments, approve transactions or manage banking relationships at a company based in Brazil. https://aitrainers.jobs/jobs/biology-expert-ai-trainer-brazil-19il6lhttps://aitrainers.jobs/jobs/biology-expert-ai-trainer-brazil-19il6lTue, 04 Aug 2026 12:52:27 GMTRemote part-time work writing advanced biology problems with exactly one correct answer and verified solutions. Suits biologists with a graduate degree who are comfortable with Python-based 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/full-stack-developer-brazil-w63kmhttps://aitrainers.jobs/jobs/full-stack-developer-brazil-w63kmFri, 26 Jun 2026 15:15:29 GMTRemote contract work designing full-stack coding tasks and reviewing peer work for accuracy and clarity. Suits Python and JavaScript developers with several years of production experience. https://aitrainers.jobs/jobs/software-engineering-ai-trainer-brazil-3u09c0https://aitrainers.jobs/jobs/software-engineering-ai-trainer-brazil-3u09c0Mon, 22 Jun 2026 15:11:53 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/mathematics-expert-brazil-1osfv1https://aitrainers.jobs/jobs/mathematics-expert-brazil-1osfv1Thu, 18 Jun 2026 22:42:20 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-brazil-cech5thttps://aitrainers.jobs/jobs/physics-expert-ai-trainer-brazil-cech5tThu, 18 Jun 2026 20:38:05 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/subject-matter-expert-robotics-portuguese-br-remote-17s6gkhttps://aitrainers.jobs/jobs/subject-matter-expert-robotics-portuguese-br-remote-17s6gkWed, 10 Jun 2026 17:54:15 GMTCreates and reviews robotics and natural sciences scenarios in Portuguese for an AI benchmarking project. Suits experienced robotics, mechanical or software engineers who want flexible contract work. https://aitrainers.jobs/jobs/subject-matter-expert-natural-sciences-portuguese-br-remote-1o2d4dhttps://aitrainers.jobs/jobs/subject-matter-expert-natural-sciences-portuguese-br-remote-1o2d4dWed, 10 Jun 2026 16:07:53 GMTSubject-matter experts write and score realistic natural sciences scenarios in Portuguese to benchmark AI systems. Suits senior scientists with five or more years of practice and strong professional writing in Portuguese. https://aitrainers.jobs/jobs/subject-matter-expert-mathematics-portuguese-br-remote-1x9e11https://aitrainers.jobs/jobs/subject-matter-expert-mathematics-portuguese-br-remote-1x9e11Wed, 10 Jun 2026 07:12:42 GMTSubject-matter experts write and score realistic maths scenarios in Portuguese to benchmark AI systems. Suits senior mathematicians with five or more years of practice and strong professional writing in Portuguese. https://aitrainers.jobs/jobs/subject-matter-expert-quantative-scientific-corporate-domains-portugue-34ec88https://aitrainers.jobs/jobs/subject-matter-expert-quantative-scientific-corporate-domains-portugue-34ec88Tue, 09 Jun 2026 12:57:17 GMTDesigns and reviews technical, scientific and corporate scenarios in Portuguese for an AI benchmarking project. Suits experienced engineers, scientists or domain specialists who can also verify code. https://aitrainers.jobs/jobs/subject-matter-expert-manufacturing-industrial-operations-english-port-p31pb7https://aitrainers.jobs/jobs/subject-matter-expert-manufacturing-industrial-operations-english-port-p31pb7Tue, 09 Jun 2026 11:43:03 GMTDesigns and reviews manufacturing, industrial and supply chain scenarios in Portuguese for an AI benchmarking project. Suits experienced production, procurement or logistics professionals who want flexible contract work. https://aitrainers.jobs/jobs/subject-matter-expert-healthcare-social-assistance-portuguese-br-remot-1f25kthttps://aitrainers.jobs/jobs/subject-matter-expert-healthcare-social-assistance-portuguese-br-remot-1f25ktTue, 09 Jun 2026 09:38:17 GMTDesigns and reviews healthcare and social assistance scenarios in Portuguese for an AI benchmarking project. Suits experienced nurses or healthcare administrators who want flexible contract work. https://aitrainers.jobs/jobs/subject-matter-expert-finance-portuguese-br-remote-1nwegyhttps://aitrainers.jobs/jobs/subject-matter-expert-finance-portuguese-br-remote-1nwegyTue, 09 Jun 2026 08:46:18 GMTContributors write and grade finance and regulatory scenarios in the target language for AI benchmarking. Suits experienced finance, audit or compliance professionals fluent in the language. https://aitrainers.jobs/jobs/voice-talent-brazilian-portuguese-female-remote-478gighttps://aitrainers.jobs/jobs/voice-talent-brazilian-portuguese-female-remote-478gigMon, 18 May 2026 12:02:30 GMTRecords expressive, conversational voice samples in Brazilian Portuguese for model training, to exact technical specifications. Suits professional or semi-professional voice talents with a treated home studio who can meet tight deadlines. https://aitrainers.jobs/jobs/expert-audio-transcriber-portuguese-brazilian-pkn80whttps://aitrainers.jobs/jobs/expert-audio-transcriber-portuguese-brazilian-pkn80wThu, 14 May 2026 15:53:50 GMTTranscribe Brazilian Portuguese audio into accurate, time-aligned text that follows a project style guide. Suits native speakers with strong orthography and transcription or captioning experience. https://aitrainers.jobs/jobs/senior-software-engineer-ai-evaluation-benchmarks-sk52ishttps://aitrainers.jobs/jobs/senior-software-engineer-ai-evaluation-benchmarks-sk52isWed, 13 May 2026 19:20:37 GMTDesign coding benchmarks and data pipelines to evaluate frontier AI models, and analyze AI code for correctness and failure patterns. Suits senior software engineers with four or more years of experience and expert Python skills who can work autonomously. https://aitrainers.jobs/jobs/brazilian-portuguese-law-ethics-subject-matter-expert-sme-13bm1lhttps://aitrainers.jobs/jobs/brazilian-portuguese-law-ethics-subject-matter-expert-sme-13bm1lFri, 08 May 2026 13:15:19 GMTLegal scholars and ethics experts write advanced questions and expert answers in Brazilian Portuguese on law, governance and ethics. Suits PhD-level lawyers, judges and policy researchers with strong analytical writing skills. https://aitrainers.jobs/jobs/brazilian-portuguese-religion-philosophy-subject-matter-expert-sme-pqj2a4https://aitrainers.jobs/jobs/brazilian-portuguese-religion-philosophy-subject-matter-expert-sme-pqj2a4Fri, 08 May 2026 16:02:51 GMTTheologians, philosophers and religious studies experts write advanced questions and expert answers in Brazilian Portuguese. Suits PhD-level scholars and senior practitioners with strong analytical writing skills. https://aitrainers.jobs/jobs/brazilian-portuguese-history-subject-matter-expert-sme-abe206https://aitrainers.jobs/jobs/brazilian-portuguese-history-subject-matter-expert-sme-abe206Fri, 08 May 2026 12:46:19 GMTHistorians and heritage specialists write advanced questions and expert answers in Brazilian Portuguese on Brazilian history and historiography. Suits PhD-level scholars and archivists with strong analytical writing skills. https://aitrainers.jobs/jobs/brazilian-portuguese-games-puzzles-subject-matter-expert-sme-1xw9xshttps://aitrainers.jobs/jobs/brazilian-portuguese-games-puzzles-subject-matter-expert-sme-1xw9xsFri, 08 May 2026 15:44:48 GMTGame designers, puzzle creators and games researchers write advanced questions and expert answers in Brazilian Portuguese to test AI reasoning. Suits senior practitioners with deep knowledge of games and interactive media. https://aitrainers.jobs/jobs/brazilian-portuguese-literature-linguistics-subject-matter-expert-sme-136i06https://aitrainers.jobs/jobs/brazilian-portuguese-literature-linguistics-subject-matter-expert-sme-136i06Fri, 08 May 2026 15:31:32 GMTLinguists, literary scholars and editors write advanced questions and expert answers in Brazilian Portuguese on language and literature. Suits PhD-level researchers and senior editors with a strong command of grammar and style. https://aitrainers.jobs/jobs/brazilian-portuguese-animals-pets-subject-matter-expert-sme-1gx5e0https://aitrainers.jobs/jobs/brazilian-portuguese-animals-pets-subject-matter-expert-sme-1gx5e0Fri, 08 May 2026 15:18:32 GMTAnimal and veterinary experts write advanced, open-ended questions and in-depth answers in Brazilian Portuguese to benchmark AI reasoning. Suits PhD-level specialists with strong writing skills and clinical or research experience. https://aitrainers.jobs/jobs/brazilian-portuguese-food-drink-culinary-culture-subject-matter-expert-1xr5wyhttps://aitrainers.jobs/jobs/brazilian-portuguese-food-drink-culinary-culture-subject-matter-expert-1xr5wyFri, 08 May 2026 14:54:49 GMTCulinary, food and hospitality experts write advanced questions and in-depth answers in Brazilian Portuguese about Brazilian food and dining culture. Suits experienced chefs, critics and researchers with strong writing skills. https://aitrainers.jobs/jobs/brazilian-portuguese-tv-film-animation-cartoons-subject-matter-expert--1ml01xhttps://aitrainers.jobs/jobs/brazilian-portuguese-tv-film-animation-cartoons-subject-matter-expert--1ml01xFri, 08 May 2026 14:48:10 GMTFilm, TV and animation professionals write advanced questions and expert answers in Brazilian Portuguese on screen culture and audiences. Suits experienced critics, producers and screenwriters with strong writing skills. https://aitrainers.jobs/jobs/brazilian-portuguese-internet-culture-subject-matter-expert-sme-1tn8gqhttps://aitrainers.jobs/jobs/brazilian-portuguese-internet-culture-subject-matter-expert-sme-1tn8gqFri, 08 May 2026 14:32:53 GMTDigital culture specialists write advanced questions and expert answers in Brazilian Portuguese on memes, online communities and viral trends. Suits experienced researchers, creators and analysts with strong writing skills.