Sonic Audit Specialist – Spanish

Mercor

. Audit AI training data in Spanish rather than produce it .

Posted 10/13/2026contractRemote • SpainMid-LevelSenior💰 $40 per hourWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates native or near-native proficiency in Spanish, with strong English reading and writing skills. Capable of performing detailed transcription audits, applying error codes, and providing clear feedback based on linguistic rules and guidelines.

Highest-signal resume keywords

Native Spanish ProficiencyTranscription Audit ExperienceError Code ApplicationAttention to DetailStrong English Writing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Multilingual TranscriptionForced Alignment AuditsLinguistic AnnotationQA ExperienceAudio EditingPhonetics KnowledgeLinguistics Background

Soft Skills

Careful ListeningClear CommunicationDisciplined Application

Tools & Technologies

Waveform Tools

Industry Keywords

AI Training DataSpeech ReviewAnnotationLocalizationCalibration Phase

About the role

Key responsibilities & impact

Audit AI training data in Spanish rather than produce it
Perform Multilingual Transcription Audits by listening to speech, reviewing annotator transcriptions, applying error codes, assigning pass/fail verdicts, and writing rationales
Perform Forced Alignment Audits by verifying word-level segment timestamps and reference transcriptions against spoken audio
Correct inaccurate boundaries, split or merge segments, add missing segments, and remove segments containing no word
Apply every applicable error code and explain in plain language why each task passed or failed
Call out critical errors first so failure reasons are clear
Complete a calibration phase before beginning production work
Work on projects that train and enhance AI systems

Requirements

What you’ll need

Native or near-native command of Spanish as spoken in Spain
Born and raised in a region where Spanish and this variety is dominant, or fully fluent with five or more years of residence in such a region
Strong English reading and writing
Ability to read a detailed rulebook and write clear feedback in English
Disciplined application of written rubrics across hundreds of judgments
Careful listening ability, including distinguishing similar sounds and word boundaries in continuous speech
Prior transcription, subtitling, localization, linguistic annotation, or QA experience is a strong signal
Helpful but not required: prior AI data annotation or model evaluation work
Helpful but not required: phonetics or linguistics background
Helpful but not required: experience with audio editing or waveform tools
Must complete a short calibration phase before production work
Must be able to work as an independent contractor
H1-B and STEM OPT candidates are not supported

Benefits

Comp & perks

Fully remote role
Flexible schedule; can be completed on your own schedule
Weekly payments via Stripe or Wise based on services rendered
Competitive pay
Opportunity to collaborate with leading researchers
Opportunity to help shape the next generation of AI systems
Referral opportunity earning up to $160 per successful referral, subject to referral limits
Reasonable accommodations upon request