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gdamoreira/README.md

Hi, I'm Guilherme

Senior Software Engineer | Java & Kotlin | Cloud, APIs & Application Security

Typing SVG

Open to challenges

Senior Software Engineer at Beyonnex.io, based in Barcelona. For 15+ years I have been designing and building scalable systems — from banking and government platforms to security tooling and 3D automation pipelines. Today I work on a platform that calculates real-time heating consumption and costs for buildings, replacing manual processes with IoT-driven, event-based calculation built on Kotlin, Quarkus and Kafka.

Some highlights from my career: I helped transform a small Brazilian startup (Decora) into a market leader by architecting the core of a 3D automation platform that scaled the company from 15 to 150+ people and led to Brazil's second-largest tech acquisition at the time. At Oracle I worked as a Senior Application Security Engineer, building internal tooling that automated code and static analysis. I also served as CTO of Reticomm and hold two postgraduate degrees — an MBA in Project Management and an MBA in Data Science.


Tech Stack

Backend

Java Kotlin Spring Boot Quarkus Python Rust

Messaging & Architecture

Apache Kafka RabbitMQ REST APIs

Cloud & DevOps

AWS Docker Kubernetes Linux Jenkins Gradle Maven Git

Databases

PostgreSQL MongoDB Redis Oracle

Frontend

Angular React Vue.js TypeScript HTML5 CSS3

Testing & Security

JUnit5 Postman Application Security


What I do

  • Backend & APIs: microservices and event-driven systems with Java, Kotlin, Spring Boot and Quarkus
  • Cloud & Infrastructure: AWS, Docker and Kubernetes, from design to production
  • Application Security: secure code reviews, static analysis automation and vulnerability management
  • Data: modeling and optimization with PostgreSQL, MongoDB, Redis and Oracle
  • Leadership: leading cross-functional teams with Agile and PMBOK practices

GitHub Stats GitHub Streak Top Languages


Get in touch

LinkedIn Email Website


Beyond code

When I am not coding you will find me practicing karate, at the gym, gaming, reading, studying new technologies or tinkering with my home lab.

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