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Mariana Mansour

Mariana Mansour

Linguist – AI Training & Quality Assurance

Brazil flagSão Paulo, Brazil
$26.00/hrIntermediateAppenClickworkerData Annotation Tech

Key Skills

Software

AppenAppen
ClickworkerClickworker
Data Annotation TechData Annotation Tech
LabelboxLabelbox
OneFormaOneForma
RemotasksRemotasks
Scale AIScale AI
TolokaToloka
Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
ImageImage
TextText

Top Task Types

Evaluation Rating
Fine Tuning
RLHF
Translation Localization

Freelancer Overview

Linguist and AI data labeling specialist with hands-on experience in classifying model outputs, selecting optimal responses, and annotating bilingual datasets (EN-PT). At Outlier (Scale AI), DataAnnotation, and Invisible, I worked on labeling and evaluating AI-generated text, refining prompts, and ensuring outputs met factual accuracy, relevance, and style requirements. My work has included categorizing data, proofreading AI responses, and aligning content to linguistic and formatting standards. This combination of detailed annotation, linguistic precision, and AI evaluation experience allows me to deliver consistently high-quality labeled datasets that improve model accuracy and reliability.

IntermediateEnglishSpanishPortuguese

Labeling Experience

AI Text Evaluation & Data Annotation

Internal Proprietary ToolingTextClassificationTranslation Localization
Worked oN Bilingual AI evaluation projects involving classification of model responses, ranking outputs for accuracy and relevance, and annotating datasets to improve performance of large language models. Tasks included writing and refining prompts, labeling responses for factuality and clarity, and proofreading generated text for grammar, style, and compliance with project guidelines. Consistently delivered high-quality annotations that enhanced AI model understanding of linguistic nuances across EN-PT.

Worked oN Bilingual AI evaluation projects involving classification of model responses, ranking outputs for accuracy and relevance, and annotating datasets to improve performance of large language models. Tasks included writing and refining prompts, labeling responses for factuality and clarity, and proofreading generated text for grammar, style, and compliance with project guidelines. Consistently delivered high-quality annotations that enhanced AI model understanding of linguistic nuances across EN-PT.

2024

Education

U

University Of São Paulo Faculty Of Philosophy, Languages And Human Sciences

Bachelor Of Languages, Linguistics And Portuguese

Bachelor Of Languages
2014 - 2020

Work History

K

Kalunga

Content Reviewer

São Paulo
2023 - Present
T

Telesapiens Publisher

Content Reviewer

São Paulo
2023 - 2024