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Rafael Vázquez Zepeda

Rafael Vázquez Zepeda

AI Training Data Expert | Linguistic |Text | Audio | Philosophy | Safety

Spain flagBarañain, Spain
$16.00/hrIntermediateData Annotation TechLabelbox

Key Skills

Software

Data Annotation TechData Annotation Tech
LabelboxLabelbox

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
DocumentDocument
TextText

Top Task Types

Audio Recording
Classification
Emotion Recognition
Prompt Response Writing SFT
Translation Localization

Freelancer Overview

Versatile bilingual data annotation and AI training specialist with experience across text, audio, and visual data. Skilled in evaluating English and Spanish datasets for accuracy, context, intent, and overall quality — from linguistic analysis and transcription to content categorization, safety alignment, and user experience assessment. I have contributed to multiple AI development projects involving LLM evaluation, speech recognition, and multimodal data labeling. With a background in communication, philosophy, and digital media production, I combine analytical precision with creative and technical insight. My expertise spans audio recording and voice-over work, search quality evaluation, and ethical data review. I bring consistency, adaptability, and a holistic understanding of how high-quality data fuels effective, responsible AI systems.

IntermediateEnglishSpanish

Labeling Experience

Labelbox

AI Training - Marketing Expert

LabelboxTextClassificationEvaluation Rating
Evaluating Marketing-related content to ensure quality of information, logic, theory, and strategic principles.

Evaluating Marketing-related content to ensure quality of information, logic, theory, and strategic principles.

2025
Labelbox

AI Voice Trainer (Spanish)

LabelboxAudioAudio Recording
Create and refine high-quality recordings, ensuring accuracy, clarity, and naturalness in evaluating and training AI voice models.

Create and refine high-quality recordings, ensuring accuracy, clarity, and naturalness in evaluating and training AI voice models.

2025
Labelbox

AI Voice Trainer (English)

LabelboxAudioAudio Recording
Create and refine high-quality recordings, ensuring accuracy, clarity, and naturalness in evaluating and training AI voice models.

Create and refine high-quality recordings, ensuring accuracy, clarity, and naturalness in evaluating and training AI voice models.

2025
Labelbox

Translation and Localization English - Spanish

LabelboxTextText SummarizationDiagnosis
Evaluating the quality of translations to and from English and Spanish. Rating, summarization, diagnosis, and correction.

Evaluating the quality of translations to and from English and Spanish. Rating, summarization, diagnosis, and correction.

2025 - 2025
Data Annotation Tech

Subject Matter Expert - Philosophy Domain

Data Annotation TechTextClassificationQuestion Answering
Engaging in conversation with different LLMs while challenging their Philosophical understanding and logical thinking. Some projects were focused on Red Teaming or Jailbreaking the models based on logical thinking.

Engaging in conversation with different LLMs while challenging their Philosophical understanding and logical thinking. Some projects were focused on Red Teaming or Jailbreaking the models based on logical thinking.

2024 - 2025

Education

U

Universidad Iberoamericana

Bachelor, Communications

Bachelor
2009 - 2013

Work History

H

HTAG

Translation & Localization Consultant

Spain
2023 - Present
S

Stepping Stones Crisis Society

Cross-Cultural Communications Manager

Canada
2021 - 2023