John Kevin Barrera Contreras

Portfolio

A selection of research, data engineering, and social impact work across Latin America and beyond.

Most of my public projects are on GitHub
Research

Research & Social Impact

World Bank · 2023–2025

Healthcare Accessibility Modeling

Multi-country research measuring population risk and distance to health services using graph theory and machine learning. Connected to master's thesis and peer-reviewed publication.

Graph Theory Geospatial Python ML
PCM · MINSA · 2020

COVID-19 Contact Tracing — Peru in Your Hands

Contact tracing algorithms and contagion probability models for Peru's national COVID-19 response, applying graph theory to population interaction data.

Graph Theory Public Health Python
UP · Springer · 2020

Lima Health Network — Earthquake Resilience

Analysis of Lima's health system capacity under seismic scenarios using graph theory, GIS, and simulation. Published in Springer (ISBN 978-3-030-76228-5).

GIS Network Modeling Simulation
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Open Source

Kankunapaq Initiative

Kankunapaq is an open source initiative building free digital products for communities. All tools are libre, public, and built with social impact in mind.

Open Source Initiative

Kankunapaq

Umbrella initiative for creating free, open digital products for communities. "Kankunapaq" means for them in Quechua — technology built for people, not profit.

Open Source Community Free
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EdTech · Free

Hamutay — School Management

Web app for school administration aligned with Peru's national curriculum (malla curricular). Free for institutions. "Hamutay" means to think, to reflect in Quechua.

EdTech Web App Peruvian Curriculum
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Game · Open Source

Searchins

Minesweeper reimagined in the Strait of Hormuz. A browser game where you navigate one of the world's most strategic waterways avoiding hidden mines.

Game Browser Open Source
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Data Engineering

Data Architecture & Engineering

Globant · 2021–2024

Liga MX Data Platform

End-to-end data architecture on Azure for one of Latin America's premier football leagues, enabling data-driven decision making at scale.

Azure Databricks PySpark ADF
Globant · 2021–2024

BICE Bank Data Platform

Data platform for a Chilean bank on Google Cloud, enabling large-scale batch processing and a secure data governance framework.

GCP Data Governance Python
Rappi · 2020–2021

RappiBank Data Pipelines — LATAM

Data engineering for RappiBank across Latin America. Graph-based storage with Neo4j for degree-of-separation and transaction modeling.

Snowflake Neo4j Airflow Spark

Technology for Social Good

VacBs — Dairy Production App

Mobile application using neural networks for cattle milk production optimization in rural Andean communities, in collaboration with national agricultural institutions.

Neural Networks Mobile Rural Tech

EsanCoin / CiupCoin

Educational cryptocurrency based on a Bitcoin fork, with a full video tutorial series to teach blockchain fundamentals to university students.

Bitcoin Blockchain Education

Decentralized Applications

Smart contract development and DApp creation on the Ethereum platform for research and educational purposes.

Ethereum Smart Contracts Solidity