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Jonatas Dev

Jonatas Dev

Data Scientist in Contract Review, Compliance, and Legal Research

Brazil flagVitória, Brazil
$25.00/hrExpertData Annotation TechLabelboxRemotasks

Key Skills

Software

Data Annotation TechData Annotation Tech
LabelboxLabelbox
RemotasksRemotasks
Scale AIScale AI
Other
Internal/Proprietary Tooling

Top Subject Matter

Legal Services & Contract Review
Regulatory Compliance & Risk Analysis
Legal Research & Document Analysis

Top Data Types

ImageImage
TextText
DocumentDocument

Top Task Types

Computer Programming Coding
Evaluation Rating
Classification

Freelancer Overview

I have experience working on AI-related tasks involving data quality, structured evaluation, and training-oriented workflows, including work through platforms and companies such as Outlier and Revelo. This experience helped me develop strong skills in reviewing outputs carefully, following detailed guidelines, identifying inconsistencies, and handling tasks that require precision, analytical thinking, and good judgment. My broader background in Python, backend systems, and AI-related projects also gives me a stronger technical understanding than a typical labeling-only profile, which helps me work well with complex data and understand how training data impacts real system behavior. In addition to that, I have experience in research and production environments where dealing with ambiguous data, validating information, and maintaining quality across multi-step processes was part of the job. That makes me especially strong in tasks related to annotation quality, data structuring, edge-case analysis, and clear reasoning. I believe what sets me apart is the combination of hands-on AI training experience, technical depth, and a very careful and consistent approach to quality.

ExpertEnglishPortugueseGerman

Labeling Experience

Audio Image Evaluator

ImageClassification
My goal at this job was compare images and check the AI answer. I must evaluate the AI classification in different dimensions.

My goal at this job was compare images and check the AI answer. I must evaluate the AI classification in different dimensions.

2024 - 2025

AI Code Evaluator

Computer Code ProgrammingComputer Programming Coding
My goal at this job was write some questions and then provide the code answer for theses questions. Then an AI provides the answer for the same questions and I must to compare both answer giving some feedback to improve the AI when necessary.

My goal at this job was write some questions and then provide the code answer for theses questions. Then an AI provides the answer for the same questions and I must to compare both answer giving some feedback to improve the AI when necessary.

2024 - 2024

Education

F

Federal University of Maranhão

Doctor of Philosophy, Computer Science

Doctor of Philosophy
2020 - 2024
U

University of Regensburg

Non-Degree Studies, German as a Foreign Language

Non-Degree Studies
2021 - 2022

Work History

S

Spassu

Data Scientist

Vitória
2025 - Present
S

Spassu

Software Engineer

Vitória
2023 - 2025