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Estudando
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Achievements

Achievement: Pull Sharkx4Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pull Sharkx4Achievement: QuickdrawAchievement: YOLO

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@four-2 @learning-to-the-extreme

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GuilhermePortella/README.md

Guilherme Portella

Backend Software Engineer • Java/Spring • Microservices • Cloud (AWS/Azure) • Financial Services

Profile

Backend Software Engineer with 5+ years of experience delivering and modernizing mission-critical systems in the financial sector. Specialized in Java and Spring Boot, microservices, cloud migration (AWS/Azure), and resilient architectures, with strong focus on reliability, scalability, and clean engineering practices.

Currently pursuing a postgraduate degree in Cybersecurity (Red Team), strengthening hands-on knowledge in offensive security, vulnerability assessment, and security-minded engineering.

Core Competencies

  • Backend Engineering: Java, Spring Boot, REST APIs, microservices, integration patterns
  • Cloud & Containers: AWS, Azure, Docker, Kubernetes
  • Data: SQL/NoSQL (MySQL, MongoDB, Redis)
  • Messaging & Streaming: Kafka
  • Delivery & Quality: CI/CD, automated testing, versioning, code quality practices
  • Observability: Splunk, Datadog, Dynatrace
  • Additional: JavaScript/Node.js, Angular, C

Education

  • B.Sc. in Computer Science
  • Postgraduate in Cybersecurity (Red Team) — in progress
  • LL.B. in Law (Brazil)
  • Technical Program in Space Observation & Telescope Assembly

Certifications

Contact

Repositories are organized by study projects, architecture references, and production-grade experiments.
If you want to discuss architecture, engineering practices, or collaboration, feel free to reach out.

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  1. Mastering_Java_Language Mastering_Java_Language Public

    👽 Guia de Programação na linguagem Java ☕

    Java 5

  2. IntroducaoCienciasComputacao IntroducaoCienciasComputacao Public

    👽 Guia de Estudos para o curso de ciências da computação 👻

    JavaScript 3

  3. Mastering_Computer_Networks Mastering_Computer_Networks Public

    👽 Guia de Estudos para Redes de Computadores 📡

    2

  4. Mastering_C_Language Mastering_C_Language Public

    👽 Guia de Programação na linguagem C 💥

    C 1

  5. Warm-Up-Offensive-Cyber-Security Warm-Up-Offensive-Cyber-Security Public

    Aqui vou deixar conteúdos e trilhas de estudo sobre Cyber Security com foco principal em operações de Red Team, mas antes de adicionar conteúdos avançados irei deixar toda a base para que você poss…

    Java 3

  6. ReconhecimentoFacial ReconhecimentoFacial Public

    Projeto desenvolvido em Java aplicando conceitos de aprendizagem de maquina. O algoritmo ira tirar fotos do usuário assim criando um padrão sendo possível reconhecer o rosto do usuario assim que el…

    Java 2 1