Fernando Andrade
Software Engineer from Brazil.
Specializing in software architecture, distributed systems and GIS applications, helping teams build scalable and high-performance solutions.
Latest articles
View all posts →Jun 6, 2026CloudMar 2, 2023Testing
most recent
DatabasesMar 12, 2026From 6 Hours to 40 Seconds - How a Database Index Saved a Critical Production Job
A scheduled job that should finish in 4 hours started taking 12 and the culprit was a query with no index scanning a table that never stopped growing. See how a single composite index cut processing time from 6h18min down to 40 seconds, and finally understand what indexes are, when to use them, and why they make such a difference in practice.
From Commit to Deployment - CI/CD for an AWS API using GitHub Actions, ECS, and Terraform
Learn how to build a complete CI/CD pipeline for an API on AWS using GitHub Actions, ECS, and Terraform to automate deployments.
Integration Testing with Containers
Learn how to create more reliable integration tests using containers to simulate real environments during test execution.
Projects
View all projects →he4rt-discovery
A pipeline that extracts data from GitHub organizations and builds a knowledge graph in Neo4j. It allows you to explore relationships between developers, repositories, teams, and technologies using Cypher queries.
C#
he4rt-connections
display graph of interactions frmo he4rt organization
HTML
api-quality-lab
Laboratory repository for experimenting with CI/CD pipelines using GitHub Actions and AWS services.
HCL
Studying software architecture, scalability and trying to build smaller projects with more consistency and quality.