About Me

Hi, I’m Rafael Marcos, a Computer Science graduate and developer focused on backend and Android development.

I build backend applications with Java 17 and Spring Boot, Android applications with Kotlin and Jetpack Compose, and practice competitive programming in C++ to deepen my knowledge of data structures and algorithms.

I primarily use Java 17 and Spring Boot for backend development. I can also use Kotlin on the backend when a project or team requires it.

For Android development, I use Kotlin and Jetpack Compose to build```markdown

About Me

Hi, I’m Rafael Marcos, a Computer Science graduate and developer focused on backend and Android development.

I build backend applications with Java 17 and Spring Boot, Android applications with Kotlin and Jetpack Compose, and practice competitive programming in C++ to deepen my knowledge of data structures and algorithms.

I primarily use Java 17 and Spring Boot for backend development. I can also use Kotlin on the backend when a project or team requires it.

For Android development, I use Kotlin and Jetpack Compose to build modern and maintainable mobile applications.

I also practice competitive programming in C++ for fun and to strengthen my understanding of data structures, algorithms, problem-solving, and computational thinking.

I graduated in Computer Science from IMETRO and am currently completing the Common Core at 42 Luanda. I plan to use this blog to share my experience at 42 Luanda, including the projects I work on, the challenges I face, and the lessons I learn through its project-based and peer-to-peer learning approach.

I use this blog to document my learning process, share practical projects, explain technical concepts, and reflect on the challenges I encounter while building software.

What I Write About

Backend Development

I share projects, tutorials, and lessons related to:

• Java 17
• Spring Boot
• Spring Web
• REST API development
• Database design
• Spring Data JPA
• Authentication and authorization
• Spring Security
• Testing
• Clean architecture
• Docker and deployment

Android Development

I write about building Android applications with:

• Kotlin
• Jetpack Compose
• Android Studio
• ViewModel and state management
• Navigation
• Coroutines and Flow
• REST API integration
• Retrofit
• Ktor
• Local data storage
• Room
• Coil
• Android testing

Competitive Programming and Algorithms

I also publish competitive-programming notes and problem-solving solutions in C++.

This is a personal learning track focused on:

• Data structures
• Algorithms
• Time and space complexity
• Dynamic programming
• Graph algorithms
• Searching and sorting
• Recursion and backtracking
• Greedy algorithms
• Contest problem-solving techniques

I practice competitive programming to deepen my DSA knowledge and improve the way I approach complex problems. These articles are written mainly for learning and enjoyment rather than as a representation of my primary production-development stack.

My Experience at 42 Luanda

I am currently completing the Common Core at 42 Luanda, where I learn through practical projects, peer evaluation, collaboration, and independent problem-solving.

I plan to share topics such as:

• My progress through the Common Core
• Lessons learned from 42 projects
• Challenges I encounter and how I solve them
• My approach to debugging and problem-solving
• Peer-to-peer learning and collaboration
• Time management during intensive projects
• How the 42 learning model is shaping my development skills
• The connection between my 42 experience and my backend and Android goals

Education

• Computer Science graduate — IMETRO
• Common Core student — 42 Luanda

Technical Skills

Backend Development

• Java 17
• Spring Boot
• Spring Web
• Spring Data JPA
• Spring Security
• REST APIs
• PostgreSQL
• Docker
• JUnit and Mockito

Android Development

• Kotlin
• Jetpack Compose
• Android Studio
• ViewModel
• Navigation
• Coroutines and Flow
• Retrofit
• Ktor
• Coil
• Room

Algorithms and Problem Solving

• C++
• Data structures and algorithms
• Competitive programming
• Complexity analysis
• Problem-solving techniques

Tools and Practices

• Git and GitHub
• Object-oriented programming
• Clean architecture
• Unit and integration testing
• API documentation
• Debugging
• Peer collaboration
• Project-based learning

What I’m Looking For

I’m interested in opportunities where I can continue growing as a developer, including:

• Junior Java and Spring Boot positions
• Junior Android development positions
• Backend development projects
• Android application projects
• Freelance software-development work
• Open-source collaborations
• Opportunities to learn from experienced developers

Let’s Connect

• GitHub
• LinkedIn
• Portfolio
• Resume
• Email me