Cesar Arroyo

Key Skills

Software

Appen

Clickworker

CloudFactory

CVAT

Data Annotation Tech

Deep Systems

Mighty AI

Scale AI

Top Subject Matter

No subject matter listed

Top Data Types

Document

Image

Text

Top Task Types

Audio Recording

Bounding Box

Routing

Tracking

Freelancer Overview

I specialize in text analysis and have actively contributed to Natural Language Processing (NLP) projects for international clients across diverse industries. My academic background in linguistics, combined with hands-on experience using tools such as spaCy, NLTK, and Hugging Face Transformers, has enabled me to develop robust solutions for sentiment analysis, entity recognition, and multilingual model evaluation. I’ve collaborated with cross-functional teams to optimize language models for Spanish-language tasks, ensuring cultural and contextual accuracy. This blend of theoretical knowledge and practical implementation allows me to deliver high-impact results in data-driven environments.

Labeling Experience

Text Classification and Sentiment Analysis for NLP Projects

Mighty AITextText Generation

This project focuses on leveraging Natural Language Processing (NLP) techniques to enhance customer experience and business intelligence in the e-commerce sector. The goal is to develop and refine machine learning models capable of analyzing customer feedback, product reviews, and support interactions across multiple languages—primarily Spanish and English.

This project focuses on leveraging Natural Language Processing (NLP) techniques to enhance customer experience and business intelligence in the e-commerce sector. The goal is to develop and refine machine learning models capable of analyzing customer feedback, product reviews, and support interactions across multiple languages—primarily Spanish and English.

2023 - 2025

Education

Work History