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Mateus Barros

Mateus Barros

AI Data Annotator for Engineering, Physics, and technical subjects.

Brazil flagRio de Janeiro, Brazil
$20.00/hrIntermediateData Annotation TechMercorOneforma

Key Skills

Software

Data Annotation TechData Annotation Tech
MercorMercor
OneFormaOneForma
Other

Top Subject Matter

No subject matter listed

Top Data Types

DocumentDocument
ImageImage
TextText

Top Task Types

Classification
Evaluation Rating
Fine Tuning
Prompt Response Writing SFT
Translation Localization

Freelancer Overview

My skills combines experience in AI data training with specialized knowledge from STEM subjects, such as my Nanotechnology and Materials Engineering studies at the Federal University of Rio de Janeiro (UFRJ) in Brazil. I am proficient in labeling and creating datasets across various mediums, including images, documents, text, and review of intermediate Python for more advanced tasks. I am skilled in the full data workflow, from initial data generation (as a creator) to quality assurance (as a reviewer).

IntermediateEnglishSpanishPortuguese

Labeling Experience

Data Annotation Tech

Data Annotator

Data Annotation TechTextText GenerationTranslation Localization
I worked in various projects with a wide range of subjects. They are related to: - Prompt & Response Writing - Text Generation & Evaluation - Coding debugging - Translation & Localization In all cases I'm used to work both as a data creator or as a reviewer.

I worked in various projects with a wide range of subjects. They are related to: - Prompt & Response Writing - Text Generation & Evaluation - Coding debugging - Translation & Localization In all cases I'm used to work both as a data creator or as a reviewer.

2024

Data Annotator

OtherTextRelationshipAction Recognition
I worked with a interface simulating an smartphone device, in that interface I had to teach the AI model the steps necessary to fulfill the user request. Such as ordering items online, sending messages an emails, and scheduling meetings.

I worked with a interface simulating an smartphone device, in that interface I had to teach the AI model the steps necessary to fulfill the user request. Such as ordering items online, sending messages an emails, and scheduling meetings.

2024 - 2025

Education

F

Federal University of Rio de Janeiro

Bachelor of Science in Nanotechnology with an emphasis in Materials Engineering, Nanotechnology and Materials Engineering

Bachelor of Science in Nanotechnology with an emphasis in Materials Engineering
2020 - 2025

Work History

B

Brazilian Center for Physics Research (CBPF)

Research Intern

Rio de Janeiro
2025 - Present
I

IMA/UFRJ - Institute of Macromolecules

Research Assistant

Rio de Janeiro
2024 - 2025