Transcription Quality Specialist - AI Trainer
Mercor
The role
We are hiring native and near-native Spanish speakers to audit AI training data in their own language , not to produce it.
You will work across two Amazon Sonic audit collections:
Multilingual Transcription Audit. You listen to a recording of human or agent speech, read the transcription an annotator produced, and judge whether it accurately captures what the speaker actually said. You apply a fixed set of error codes, assign a pass or fail verdict, and write a short rationale explaining the decision.
Forced Alignment Audit. You review audio that has already been segmented at the word level by an automated system. For each segment you verify that the start and end timestamps match where the word actually begins and ends, and that the reference transcription matches the spoken form. Where the machine got it wrong, you correct the boundary, split a segment, merge two, add a missing one, or remove one that contains no word.
Both collections run at 5.00 audit hours per task. Every judgment carries a written reason, so this is careful listening work rather than volume work.
Who we are looking for
Native or near-native command of Spanish as spoken in Spain. You were either born and raised in a region where this language and variety is dominant, or you are fully fluent with five or more years of residence in such a region. This is a hard requirement.
Strong English reading and writing. All conventions, error codes, and audit rationale are written in English, so you need to read a detailed rulebook and write clear feedback in it.
Disciplined rubric application. The work rewards people who apply a written standard consistently across hundreds of judgments rather than relying on instinct. Prior transcription, subtitling, localization, linguistic annotation, or QA experience is a strong signal.
Careful listening. You can distinguish similar sounds, identify where one word ends and the next begins in continuous speech, and tell genuine acoustic ambiguity apart from a clear annotator error.
Helpful but not required: prior AI data annotation or model evaluation work, a phonetics or linguistics background, and experience with audio editing or waveform tools.
What the work looks like
You listen, judge, and submit. Where you find an error you tag every applicable error code, not just the first one, and you explain in plain language why the task passed or failed. Critical errors are called out first so the reason for a failure is obvious to the reader.
You will complete a short calibration phase before production work begins.
#J-18808-Ljbffr- ...technical talent with leading AI research labs. Headquartered... ...Position: Sonic Audit Specialist - Spanish Type: Contract... ...Spanish by auditing multilingual transcription and forced alignment tasks... ...AI model training and data quality . Work independently...Ofertas de empleo recomendadasTrabajo remotoTrabajo de veranoContratoHorario flexible
14.3 $/hora
...Spanish languagecould help improve the AI. WHAT YOU'LL DO Review... ...accuracy, fluency, and overall translation quality. Select the preferred translation... ...Review audio files and their corresponding transcriptions, evaluating accuracy, completeness, and...Ofertas de empleo recomendadasFreelanceContratoRemoto- ...The Project TSMG is looking for Quality control specialists to support an AI language project focused on improving... ...and ensure that AI-generated transcripts have been accurately converted into... ...against the original lexical transcript and project guidelinesVerify the...Ofertas de empleo recomendadas
- ...Mercor is partnering with a leading AI research lab to build next-generation text-to-speech (TTS) systems capable of producing natural... ...native Castilian/Peninsular Spanish accents to contribute high-quality voice recordings for training and evaluating cutting-edge speech...Ofertas de empleo recomendadas
250 $/mensuales
...Castilian Spanish Voice Actors to work directly with a leading AI lab, improving their model's ability to handle and produce... ...punctuation, commas and dashes. It is very important that you record transcripts exactly as written, or edit them to reflect natural pacing....Ofertas de empleo recomendadasContrato- ...About the job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey ....Trabajo de veranoContratoRemoto
- ...Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors... ...AI-generated music across various genres. Rate against detailed quality standards in Spanish (ES) and English . Compare AI-generated...Trabajo de veranoContratoRemotoInicio inmediatoHorario flexible
- ...About the job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey ....Trabajo de veranoContratoRemoto
- ...Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors... ...5-10 hours/week Role Responsibilities Record high-quality voice samples across diverse scripts such as conversational, narrative...Trabajo de veranoContratoRemoto
- ...build, integrate and support AI applications with confidence.... ...technical workshops, train-the-trainer sessions and hands-on labs for... ...localise examples. Keep delivery quality high across regions, cohorts... ...provided, and you grow into a specialist role in a new, high-visibility...Tiempo completoDesde casaHorario flexible
- ...DWS Group in Madrid is seeking a Smart Automation & AI Associate to translate operational pain points into scalable AI-driven solutions... ...leverage Python, SQL, and workflow automation to improve data quality and drive efficiency across Run the Bank and Change the Bank...
- ...Overview Prolific is building the biggest pool of quality human data in the world. We support AI development by connecting researchers with a global pool of participants for paid studies. Role: AI Trainer - Advanced Korean Fluency The role involves training...AutónomoDesde casaRemotoHorario flexible
- ...Agency seeks a Spanish language expert to help shape the future of AI by challenging models on language skills such as verb conjugation, agreement, subjunctive usage, sentence structure, and regional dialects. You will document failures and help harden model reasoning...Remoto
- 10x Team B.V in Spain seeks a Freelance Competition Law Specialist – AI Trainer to help train AI models on competition law, regulatory compliance, and antitrust issues. This remote, project-based role offers flexible hours (8–20 per week) and EU/UK-based opportunities...FreelanceRemotoHorario flexible
7 $/hora
...A leading AI training firm is seeking a Financial Institutions Specialist for a remote freelance role. You will use your expertise in banking systems and financial regulations to engage AI models in real-world scenarios, ensuring factual correctness and offering analytical...Por horaFreelanceRemoto8 $/hora
Somali Language AI Trainer to review content and provide linguistic feedback for AI model training. Remote role with flexible pay based on experience.Remoto- ...all applications and next steps. Our partner is looking for a AI Trainers Network - English based in Spain. As part of a global AI contributor... ...your availability. Your work may directly influence the quality, relevance, accuracy, and inclusiveness of advanced AI systems...TemporalRemoto
- 10x Team invites a freelance Infrastructure Optimization Specialist - AI Trainer to join 8–20 hours/week, remote (EU/UK). You'll shape AI infrastructure guidance and validate deployment scenarios while enjoying flexible, project-based work.Based in EU or UK, you'll review...FreelanceRemotoHorario flexible
- ...What if your Spanish language skills could help improve the AI. PROJECT DETAILS Job Title: Hydrus - Voice Contributor - Spanish(Spain) Project Overview: a scripted and conversational audio data collection project Language: Spanish(Spain) Location: Remote...Por horaPrácticaRemoto
- ...A technology company is looking for a Spanish Language Specialist (Latin America) to engage with AI models. The role involves verifying linguistic accuracies and documenting errors, suited for those with a background in Spanish language or linguistics. Offers a...Por horaRemoto
8 $/hora
...Agency is seeking science specialists fluent in Spanish (Spain) to power AI training and evaluation. You will engage with models on topics like energy transformation, atomic structure, planetary motion, ecological systems, and more, documenting failures and proposing...Por horaContratistaRemoto- ...Jobgether SRL, on behalf of a partner company, seeks English-speaking AI Trainers in Spain to contribute to AI training, annotation, evaluation, and prompt creation through remote projects. Projects vary from a few days to several weeks, enabling flexible participation...Remoto
- ...Lever, Inc. is seeking an Investment Specialist - Freelance AI Trainer Project based in Spain. In this remote role, you will train AI models using your expertise in financial markets, asset management, and portfolio concepts to improve AI reasoning for equity analysis...FreelanceRemoto
- ...This is a project-based opportunity on an AI training platform. No fixed hours, no commitment beyond what fits your schedule.... ...no background music, TV, traffic, or other people talkingAudio quality: Clear voice, close to the mic, one speaker only, no echo. A...Freelance
- ...Prolific is looking for an AI Trainer with advanced French fluency in Madrid. In this role, you will evaluate and train cutting-edge AI models while performing tasks such as analyzing and editing in French. Candidates must have verifiable experience, strong attention...
- ...Automation & AI Specialist En BBVA Allianz estamos transformando la forma en que protegemos a nuestros clientes, impulsando soluciones innovadoras que combinan tecnología, datos e inteligencia artificial. Buscamos una persona apasionada por la automatización y la transformación...IndefinidoAprendizPrácticaTiempo completoCentro de la ciudadTrabajo híbridoHorario flexible
- 10x Team B.V in Spain seeks a senior eIDAS2 Specialist and AI Trainer for freelance engagement. You will review and refine AI outputs related to eIDAS2 and QES, ensuring regulatory alignment and practical accuracy across EU/UK contexts.This remote role offers 8–20 hours...FreelanceRemoto
- Entry-level remote role for a Spanish Language Specialist to verify AI model linguistic accuracy and document errors for a tech company.Remoto
- ...About the role Help train and evaluate AI agents that work inside a real CAD environment on long engineering tasks, work that would... ...technology projects while gaining experience building high-quality solutions for a global platform. Participate in performance-based...Por horaTiempo parcialFreelanceRemoto
7 $/hora
Enhance AI models by training them in the Korean language. Requires expertise in Korean grammar and linguistics, involving conversation with AI and error documentation.Remoto
¿Quieres recibir más ofertas?
Suscríbete y recibe ofertas similares para Transcription Quality Specialist - AI Trainer. ¡Entérate antes que nadie!
- tecnico calidad Madrid
- técnico de calidad en fábrica Madrid
- técnico-de-calidad-de-producto-textil Madrid
- técnico aseguramiento calidad Madrid
- tecnico calidad alimentaria Madrid
- ingeniero técnico calidad Madrid
- técnico de calidad y medio ambiente Madrid
- segundo entrenador Madrid
- entrenador de natacion Madrid
- entrenador gimnasio Madrid



