Audio Engineer (Speech / TTS Audio Specialist) – Brazilian Portuguese
Listing checked October 13, 2026 · pay as published by Mercor
Overview
Mercor seeks an audio engineer who can prep Brazilian Portuguese voice recordings for text-to-speech and speech AI systems. You will clean, edit, and quality-check large batches of speech data so they meet strict specs for machine learning pipelines. The work centers on iZotope RX, Pro Tools, and similar restoration tools, along with close listening for pronunciation, naturalness, and fluency. Native or near-native Brazilian Portuguese is mandatory because you will judge subtle speech nuances. This remote role pays by the hour and suits someone who treats audio QA as a precision craft, not a side task.
What You'll Do8
- 1Edit Brazilian Portuguese voice recordings for TTS engines and speech AI datasets.
- 2Trim silence, remove breaths, de-click, de-ess, and reduce noise across raw dialogue.
- 3Run QA checks for clipping, distortion, background noise, artifacts, and loudness balance.
- 4Match every file to strict technical specs required by ML training pipelines.
- 5Assess pronunciation, naturalness, and fluency in Brazilian Portuguese speech.
- 6Process large recording batches while maintaining consistent output and throughput.
- 7Coordinate with teams handling Brazilian Portuguese speech datasets, voice talent sessions, and model training workflows.
- 8Flag files that fail quality thresholds and document the defects.
Requirements10
- 1Native or near-native Brazilian Portuguese with sharp listening instincts for speech nuances.
- 2Hands-on editing experience with speech or voice recordings, not only music production.
- 3Solid grasp of speech audio quality standards and typical problems in recorded dialogue.
- 4Practical use of iZotope RX, Pro Tools, or similar audio restoration software.
- 5Ability to spot and correct artifacts, inconsistencies, and technical defects in audio.
- 6Track record with high-volume audio datasets or structured production workflows.
- 7Preferred: work with TTS vendors or platforms.
- 8Preferred: background in speech ML, voice AI, or dataset creation and annotation.
- 9Preferred: familiarity with audio QA pipelines, labeling, or evaluation processes.
- 10Preferred: experience directing or editing Brazilian Portuguese voice talent recordings.
Who Should Apply
The ideal candidate is a native or near-native Brazilian Portuguese speaker who has spent real time editing speech, not just music. You know iZotope RX or Pro Tools well enough to remove clicks, breaths, and noise without harming dialogue, and you can keep loudness and tone consistent across hundreds of files. Engineers who only mix music or need creative variety may find the job less fitting, since it leans on repetitive, high-precision QA. Candidates often lose fit score when they cannot prove Brazilian Portuguese fluency or when their portfolio shows music tracks instead of speech datasets. Another common miss is ignoring TTS-specific requirements, such as naturalness checks and ML pipeline specs, in favor of general audio cleanup.
Salary Insight
The listing shows $50.00 per hour for this remote engagement. That rate places the role above many general audio editing gigs, which fits the demand for native Brazilian Portuguese and speech-specific QA. Pay comes by the hour, so your total depends on approved batches and project length, not a fixed annual salary.
Pay and demand for Language & Linguistics roles
AggregatedTypical pay
$30/hour
This role
$50/hr
Most Language & Linguistics roles pay $20–$46 per hour. This role's pay sits above that range.
Based on 243 similar roles that publish pay · 104 publish only a top rate; those count at the rate they gave
Rates shown per hour. Yearly and monthly pay converted; one-time fees and non-USD pay are not included.
- Live similar roles
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- Listed in last 30 days
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Hiring most right now: SME Careers (108) · micro1 (73) · Turing (40)
Most requested skills · share of roles
- localization31%
- translation quality review30%
- proofreading27%
- translation27%
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Compensation
$50/hr
Required Skills
Application Tip
Build a short sample pack with one raw Brazilian Portuguese voice clip and your cleaned version, then list the exact steps you took in iZotope RX or Pro Tools, such as de-click, de-ess, breath removal, and loudness normalization. Add batch size and QA pass rate if you have them, because those numbers show you can handle high-volume speech datasets.
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