Luiz Gustavo Barbosa Da S

Key Skills

Software

Appen

Other

Telus

OneForma

Top Subject Matter

No subject matter listed

Top Data Types

Text

Video

Top Label Types

Evaluation Rating

RLHF

Classification

Transcription

Freelancer Overview

I have hands-on experience working with micro tasks and AI training projects, including data collection, annotation, and evaluation for various platforms, including Appen, Telus, Outlier, OneForma, Remotasks, Translated. Helping to develop AI for companies such as Google, Apple, and Nvidia, among others. My background as a freelancer has given me expertise in translation, transcription, and media and website evaluation, all of which have sharpened my attention to detail and organizational skills. I am fluent in Portuguese and English, with intermediate proficiency in Spanish, allowing me to work effectively with multilingual datasets. My academic background in psychology further strengthens my analytical and research capabilities, making me well-suited for data labeling and AI training roles that require accuracy, critical thinking, and adaptability.

Labeling Experience

AI Training Project Contributor

AppenTextEvaluation Rating

This role involved completing micro tasks and contributing to artificial intelligence training projects as a freelancer. The primary focus was on evaluating, judging, and providing feedback on various AI-generated outputs. Tasks required attention to detail, comprehension of instructions, and clear judgment for AI system improvement. • Evaluated AI outputs for accuracy and relevance. • Provided qualitative feedback to improve AI models. • Worked with diverse subject domains as assigned. • Managed flexible, project-based workload.

This role involved completing micro tasks and contributing to artificial intelligence training projects as a freelancer. The primary focus was on evaluating, judging, and providing feedback on various AI-generated outputs. Tasks required attention to detail, comprehension of instructions, and clear judgment for AI system improvement. • Evaluated AI outputs for accuracy and relevance. • Provided qualitative feedback to improve AI models. • Worked with diverse subject domains as assigned. • Managed flexible, project-based workload.

2022

Transcriber

OneformaTextTranscription

I worked on a speech data transcription project aimed at improving AI voice recognition system. The workflow involved reviewing and correcting machine-generated transcriptions of recorded audio, ensuring accuracy in spelling, wording, and punctuation. In addition to fixing transcription errors, I was responsible for annotating speech disfluencies and natural verbal behavior such as stuttering, filler sounds, hesitations, and other spontaneous speech pattern that occurred throughout the recordings. This required strong attention to detail, consistency in data labeling, and the ability to follow precise linguistic and annotation guidelines, contributing to more natural and robust speech recognition performance.

I worked on a speech data transcription project aimed at improving AI voice recognition system. The workflow involved reviewing and correcting machine-generated transcriptions of recorded audio, ensuring accuracy in spelling, wording, and punctuation. In addition to fixing transcription errors, I was responsible for annotating speech disfluencies and natural verbal behavior such as stuttering, filler sounds, hesitations, and other spontaneous speech pattern that occurred throughout the recordings. This required strong attention to detail, consistency in data labeling, and the ability to follow precise linguistic and annotation guidelines, contributing to more natural and robust speech recognition performance.

2025 - 2025

AI Training Project Contributor

OtherTextRLHF

I worked on RLHF-based AI training projects performing both response rating and safety evaluation tasks. This included comparing AI-generated outputs based on accuracy, clarity, helpfulness, and instruction-following, ranking model responses, and providing structured feedback with written justifications aligned to detailed guidelines. Additionally, I tested model behavior against safety and compliance policies by reviewing sensitive prompts, identifying potential violations, assessing risk levels, and documenting issues for further refinement. My contributions supported the alignment of reward models, improved overall response quality, and ensured adherence to safety and ethical standards during model fine-tuning.

I worked on RLHF-based AI training projects performing both response rating and safety evaluation tasks. This included comparing AI-generated outputs based on accuracy, clarity, helpfulness, and instruction-following, ranking model responses, and providing structured feedback with written justifications aligned to detailed guidelines. Additionally, I tested model behavior against safety and compliance policies by reviewing sensitive prompts, identifying potential violations, assessing risk levels, and documenting issues for further refinement. My contributions supported the alignment of reward models, improved overall response quality, and ensured adherence to safety and ethical standards during model fine-tuning.

2025 - 2025

AI Training Project Contributor

OtherTextRLHF

I worked on RLHF-based AI training projects performing both response rating and safety evaluation tasks. This included comparing AI-generated outputs based on accuracy, clarity, helpfulness, and instruction-following, ranking model responses, and providing structured feedback with written justifications aligned to detailed guidelines. Additionally, I tested model behavior against safety and compliance policies by reviewing sensitive prompts, identifying potential violations, assessing risk levels, and documenting issues for further refinement. My contributions supported the alignment of reward models, improved overall response quality, and ensured adherence to safety and ethical standards during model fine-tuning.

I worked on RLHF-based AI training projects performing both response rating and safety evaluation tasks. This included comparing AI-generated outputs based on accuracy, clarity, helpfulness, and instruction-following, ranking model responses, and providing structured feedback with written justifications aligned to detailed guidelines. Additionally, I tested model behavior against safety and compliance policies by reviewing sensitive prompts, identifying potential violations, assessing risk levels, and documenting issues for further refinement. My contributions supported the alignment of reward models, improved overall response quality, and ensured adherence to safety and ethical standards during model fine-tuning.

2024 - 2024

Ads evaluator

TelusVideoClassification

I worked as an Ads Evaluator, reviewing and rating online search and social media advertisements to assess their relevance, quality, and compliance with platform-specific guidelines. My responsibilities included analyzing ad intent, evaluating keyword–ad landing page alignment, detecting policy violations, and ensuring that ads delivered accurate and useful information to users. This role required strong attention to detail, English reading comprehension, and the ability to consistently apply complex evaluation criteria to improve ad ranking systems and overall user experience.

I worked as an Ads Evaluator, reviewing and rating online search and social media advertisements to assess their relevance, quality, and compliance with platform-specific guidelines. My responsibilities included analyzing ad intent, evaluating keyword–ad landing page alignment, detecting policy violations, and ensuring that ads delivered accurate and useful information to users. This role required strong attention to detail, English reading comprehension, and the ability to consistently apply complex evaluation criteria to improve ad ranking systems and overall user experience.

2023 - 2023

Education

Work History