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Charles Montoya

Charles Montoya

Skilled in schedma design, data labeling and classification

USA flagBelen, Usa
$30.00/hrIntermediateAws SagemakerClickworkerData Annotation Tech

Key Skills

Software

AWS SageMakerAWS SageMaker
ClickworkerClickworker
Data Annotation TechData Annotation Tech
LabelboxLabelbox
LionbridgeLionbridge
Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

Computer Code ProgrammingComputer Code Programming
ImageImage
TextText

Top Task Types

Computer Programming Coding
Data Collection
Evaluation Rating
Prompt Response Writing SFT
Red Teaming

Freelancer Overview

An expert in data annotation and schema design, I have spent years crafting clear, robust annotation guidelines that drive consistency across both text and image labeling projects. Beginning with taxonomy creation and schema development, I define entity classes, multi-label hierarchies, and rating scales that enable reliable supervised classification. My hands-on work includes building inter-annotator agreement protocols, conducting regular QA audits, and refining rubrics to boost labeler accuracy—ensuring high-quality training data for both NLP and computer-vision models. In addition to guideline engineering, I excel at end-to-end annotation workflows: from batch setup in platforms like Labelbox and Prodigy, through iterative label review, to final data validation and feedback loops. I routinely perform error-analysis on edge cases, optimize annotation throughput with targeted training sessions, and collaborate closely with model developers to align data outputs with performance goals. This blend of schema expertise, rigorous QA, and cross-functional communication delivers scalable, reliable datasets that power next-generation AI systems.

IntermediateEnglishRussianSpanish

Labeling Experience

No Data Labeling experience added

Charles M. hasn’t added any AI Training or Data Labeling experience to their OpenTrain profile yet.

Education

U

University of New Mexico

Master of Science, Global Leadership and National Security

Master of Science
2021 - 2023
N

Northumbria University

Master of Arts, Criminology

Master of Arts
2017 - 2018

Work History

S

Sandia National Laboratories

Information Security Specialist

Albuquerque
2020 - Present
A

ADC

Investigative Analyst

Albuquerque
2019 - 2020