David Machado

Key Skills

Software

CVAT

Data Annotation Tech

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Image

Text

Top Task Types

Audio Recording

Data Collection

Prompt Response Writing SFT

RLHF

Translation Localization

Freelancer Overview

I have hands-on experience in AI data operations, including prompt writing, response evaluation, content classification, and quality assurance. I’ve contributed to large-scale language model training pipelines by generating and reviewing data in both English and Spanish, ensuring clarity, relevance, and linguistic precision. My strengths lie in my attention to detail, bilingual proficiency (English C2, native Spanish), and ability to follow nuanced guidelines while maintaining consistency. While I can’t disclose specifics due to confidentiality agreements, I’ve consistently worked on projects involving structured data, content accuracy, and human feedback for AI systems.

Labeling Experience

Red Teaming - Adversarial Prompting for Multimodal AI (Confidential)

Data Annotation TechImageText GenerationFine Tuning

Participated in red teaming tasks focused identifying weaknesses in multimodal AI systems. Responsibilities included crafting adversarial image-based prompts aimed at triggering unsafe, biased, or inaccurate model responses. Tasks required creativity, attention to safety policies, and a deep understanding of model behavior. Findings contributed to the improvement of system robustness and alignment. All project specifics remain confidential under NDA.

Participated in red teaming tasks focused identifying weaknesses in multimodal AI systems. Responsibilities included crafting adversarial image-based prompts aimed at triggering unsafe, biased, or inaccurate model responses. Tasks required creativity, attention to safety policies, and a deep understanding of model behavior. Findings contributed to the improvement of system robustness and alignment. All project specifics remain confidential under NDA.

2025 - 2025

Prompt Review & Quality Evaluation (Confidential)

Data Annotation TechTextText GenerationTranslation Localization

Participated in prompt review workflows aimed at improving the quality and effectiveness of user-generated inputs for large language models. Tasks included rating and reviewing prompts written by others, assessing clarity, intent, and formatting, and flagging issues that could affect model performance or safety. Provided feedback to ensure alignment with project guidelines. Project names and tools are confidential under NDA.

Participated in prompt review workflows aimed at improving the quality and effectiveness of user-generated inputs for large language models. Tasks included rating and reviewing prompts written by others, assessing clarity, intent, and formatting, and flagging issues that could affect model performance or safety. Provided feedback to ensure alignment with project guidelines. Project names and tools are confidential under NDA.

2025 - 2025

Speech Data Quality Assurance & Review (Confidential)

Data Annotation TechAudioClassificationText Generation

Reviewed and audited audio recordings and transcriptions submitted by other contributors as part of a QA workflow for speech data projects. Tasks included checking the accuracy and clarity of Spanish voice recordings, identifying errors or inconsistencies in transcriptions, and writing quality notes or corrections in English to guide model improvements. Helped ensure data quality and consistency for training AI speech models. Specific tools and processes remain confidential under NDA.

Reviewed and audited audio recordings and transcriptions submitted by other contributors as part of a QA workflow for speech data projects. Tasks included checking the accuracy and clarity of Spanish voice recordings, identifying errors or inconsistencies in transcriptions, and writing quality notes or corrections in English to guide model improvements. Helped ensure data quality and consistency for training AI speech models. Specific tools and processes remain confidential under NDA.

2025 - 2025

Spanish Data Collection & Transcription (Confidential)

Data Annotation TechAudioClassificationTranslation Localization

Participated in a multilingual voice data collection project aimed at improving speech recognition systems. Tasks involved recording natural speech in Spanish, producing accurate transcriptions, and writing detailed notes and summaries in English. Emphasis was placed on clarity, natural phrasing, and consistency across sessions. Project tools and specifications remain confidential due to NDAs.

Participated in a multilingual voice data collection project aimed at improving speech recognition systems. Tasks involved recording natural speech in Spanish, producing accurate transcriptions, and writing detailed notes and summaries in English. Emphasis was placed on clarity, natural phrasing, and consistency across sessions. Project tools and specifications remain confidential due to NDAs.

2025 - 2025

Multimodal AI Evaluation - Image Prompting & Caption Alignment (Confidential)

Data Annotation TechImageClassificationText Generation

Participated in projects involving image-based AI evaluation. Responsibilities included writing prompts based on visual based on visual content, assessing and correcting text responses generated by the model, and ensuring alignment between images and descriptions. Focused in improving the relevance clarity, and factual accuracy of outputs in both English and Spanish. All tools and project details are kept confidential in compliance with NDA agreements.

Participated in projects involving image-based AI evaluation. Responsibilities included writing prompts based on visual based on visual content, assessing and correcting text responses generated by the model, and ensuring alignment between images and descriptions. Focused in improving the relevance clarity, and factual accuracy of outputs in both English and Spanish. All tools and project details are kept confidential in compliance with NDA agreements.

2025 - 2025

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Education

Work History