Backend developer passionate about software architecture, distributed systems, and resilient microservices.

🇺🇸 English | 🇧🇷 Português

I am a Software Engineer and Software Architect specialized in the Java + Spring ecosystem, with strong experience in building scalable microservices and event-driven architectures.

My professional background combines Law and Information Systems, giving me a unique perspective when designing solutions that must comply with complex business rules, regulatory environments, and enterprise architecture standards.

💡 Main interests:

• Software Architecture
• Microservices & Event-Driven Architecture
• Reactive and scalable systems
• Distributed system integration
• Software quality and engineering best practices

📫 Contact: julianemaran@gmail.com

You can find the certificates for the courses listed below in the repository:

📂 Certificates Folder:
👉 View Certificates

☁️ Cloud & DevOps (AWS)

• AWS Partner: Containers on AWS (Technical) (Portuguese)
• Getting Started with DevOps on AWS (Portuguese)

☕ Java & Spring Ecosystem

• Java Completo: do Zero ao Profissional + Projetos
• Java e Orientação a Objetos
• Java Unit Testing com Spring Boot 3, TDD, JUnit 5 e Mockito
• Certificado de Conclusão Alura: Java e Spring

Spring Framework

• Spring Boot 3, Spring 6 & Hibernate for Beginners
• Spring Boot 4, Spring Framework 7: Beginner to Guru
• Spring Security 6 Zero to Master along with JWT, OAuth2

🔐 Data Protection & Compliance (LGPD)

• Lei Geral de Proteção de Dados Pessoais na Prática
• LGPD: Política de Privacidade e Proteção de Dados Pessoais!
• Criando uma Política de Privacidade e Proteção de Dados

👥 Leadership & People Management

• Liderança e Gestão de Pessoas e Equipes
• Liderança e Gestão de Pessoas | Formação Completa + 5 Extras

📊 Data, Analytics & Development

• Desenvolvedor Qlikview do Zero
• Formação Engenheiro de Dados: Domine Big Data!

💻 Software Development & Productivity

• Desenvolvimento Web Completo - 20 Cursos + 20 Projetos
• Excel Básico ao Avançado - 5 Cursos - Formação Especialista

Practical experience with:

• Microservices Architecture
• Domain-Driven Design (DDD)
• CQRS
• Event Sourcing
• SAGA Pattern
• Hexagonal Architecture
• Clean Architecture
• Event-Driven Architecture
• API-First Design
• C4 Model

Also involved in:

• Integration architecture design
• REST API design
• Technical reviews and code reviews
• Legacy architecture modernization
• Technical support and developer mentoring

Solid experience designing and developing distributed systems, scalable APIs, and microservices architectures, actively contributing to technical decision-making and architectural evolution.

• Scalable microservices with Java (8, 11, 17, 21) and Spring Boot
• Robust REST API development
• Reactive systems with Spring WebFlux
• Integration via REST, SOAP and Web Services
• API-First development using OpenAPI / Swagger
• Security with Spring Security, OAuth2, JWT, OpenID Connect

• DDD-based microservices architectures

• Clean Architecture and Hexagonal Architecture

• Event-Driven Architecture

• Patterns:

  • CQRS
  • Event Sourcing
  • SAGA
  • API Gateway
  • Circuit Breaker

• Architecture documentation using C4 Model

• Technical POCs and architecture validation

• Messaging with Kafka and RabbitMQ
• Enterprise systems integration
• Asynchronous and synchronous communication strategies

• AWS and Azure

• Docker

• Kubernetes and OpenShift

• CI/CD:

  • Jenkins
  • Azure DevOps
  • GitHub Actions

• TDD
• Unit, integration and contract tests
• JUnit, Mockito, Testcontainers, JMeter
• SonarQube
• Clean Code principles

• Java and Spring Boot microservices
• Software architecture patterns
• Testing strategies with JUnit, Mockito and Testcontainers
• Integration and messaging experiments
• Clean Architecture and DDD studies