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C
César J.

César J.

Software engineer, Data Science and Business Intelligence

Ecuador flagRiobamba, Ecuador

Key Skills

Software

AWS SageMakerAWS SageMaker
ClickworkerClickworker
DatasaurDatasaur
Google Cloud Vertex AIGoogle Cloud Vertex AI
MercorMercor

Top Subject Matter

Information Technology & Software Development
Artificial Intelligence & Data Science
Education & E-Learning

Top Data Types

Computer Code ProgrammingComputer Code Programming
ImageImage
TextText

Top Task Types

SegmentationSegmentation
Text SummarizationText Summarization
Evaluation/RatingEvaluation/Rating
Computer Programming/CodingComputer Programming/Coding
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Data CollectionData Collection
Text GenerationText Generation
Question AnsweringQuestion Answering
TranscriptionTranscription

Freelancer Overview

I am a Software Engineer with a Master's level background in Data Science and experience working with data preparation, validation, quality assurance, and machine learning projects. My work has involved collecting, cleaning, transforming, and analyzing structured and unstructured datasets to support data driven, decision making and predictive models. I have experience using Python, SQL, PostgreSQL, MongoDB, and data analytics tools to ensure data accuracy, consistency, and reliability throughout the data lifecycle.

Labeling Experience

Code Annotation and Software Quality Review

Computer Code ProgrammingComputer Code ProgrammingComputer Programming/CodingComputer Programming/Coding

Reviewed and analyzed source code snippets written in Java, Python, and SQL to classify functionality, identify programming concepts, and evaluate code quality.

2025 - 2025

Image Annotation for Object Detection

ImageImageBounding BoxBounding Box

Annotated image datasets for computer vision applications by identifying and labeling objects such as vehicles, pedestrians, traffic signs, and road infrastructure using bounding boxes. Performed quality assurance reviews to ensure annotation accuracy and consistency according to project guidelines.

2025 - 2025

Student Performance Data Analysis

TextTextData CollectionData Collection

Analyzed and categorized student performance data to identify academic trends and learning patterns. Reviewed data quality, corrected inconsistencies, and organized information for statistical analysis.

2024 - 2024

Financial Data Classification and Validation

TextTextClassificationClassification

Prepared, cleaned, and validated financial datasets for analysis and reporting purposes. Classified financial records into categories, identified data inconsistencies, and performed quality assurance checks to ensure accuracy.

2024 - 2024

Education

U

UNIVERSIDAD DE LAS AMERICAS

MASTER'S IN DATA SCIENCE AND BUSINESS INTELLIGENCE, COMPUTER SCIENCE

MASTER'S IN DATA SCIENCE AND BUSINESS INTELLIGENCE
2024 - 2026
E

ESPOCH

SOFTWARE ENGINEER, COMPUTER SCIENCE

SOFTWARE ENGINEER
2019 - 2024

Work History

F

Fundacion hogar del ecuador

Software Engineer

cuenca
2025 - Present
C

CITYTEACH

Quality Control Manager

QUITO
2024 - 2024