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rafaalberto/README.md

👋 Hi, I’m Rafael Alberto

Software Engineer · Backend & Distributed Systems · Fintech Engineering
Building resilient, scalable and low-latency backend systems — remote-first mindset.

🚀 Currently working at Nubank, delivering mission-critical services that power credit-card and payment platforms across Brazil, Mexico & Colombia.

🧠 What I Do

  • 💡 Design and build distributed systems, microservices and event-driven architectures
  • 🧵 Solve race conditions, thread-safety issues and concurrency challenges
  • 🏦 Experience in large-scale fintech environments: high-throughput, fault-tolerant, 24/7 systems
  • 🌍 Fluent in English & Portuguese — open to international fully-remote opportunities
  • 🔭 Actively expanding my open-source portfolio using clean architecture, modular design and modern engineering practices

🏆 Highlights & Impact

  • Improved reliability of high-volume financial services by solving concurrency and thread-safety issues
  • Worked on systems processing millions of daily transactions with strict latency requirements
  • Delivered production-critical features in globally distributed engineering teams
  • Refactoring legacy projects into modern, maintainable and testable architectures

🔧 Tech Stack

Languages: Java · Kotlin · Clojure
Frameworks: Spring Boot · NodeJS
Architecture & Messaging: Kafka · Event-Driven · Domain-Driven Design · Clean Architecture
DevOps / Infra: Docker · Kubernetes · GitHub Actions
Databases: PostgreSQL · MongoDB

📌 Featured Projects

transaction-stream-processor

Event-driven transaction processor using Kafka, clean architecture, and atomic operations.

banking-account

Backend API using Java 21 & Undertow — designed with clean architecture, modular layers, and a focus on concurrency correctness.

kotlin-api-mongodb

API project made with Kotlin Spring Boot that does CRUD operations with MongoDB

timesheet-api

Simple time-tracking microservice — clear REST design and straightforward architecture.

👉 Explore all pinned repositories for more.

📚 Currently Learning

  • Advanced system design
  • Distributed systems patterns
  • Event-driven architecture
  • Cloud-native engineering best practices

📫 Connect

⭐ Thanks for visiting my profile!

Pinned Loading

  1. transaction-stream-processor transaction-stream-processor Public

    Event-driven transaction processor using Kafka, clean architecture and atomic operations.

    Java 7

  2. banking-account banking-account Public

    A framework-free banking API first built in 2019 for a fintech interview challenge, later fully refactored in 2025 to showcase modern backend engineering practices, including concurrency safety, tr…

    Java 2

  3. kotlin-api-mongodb kotlin-api-mongodb Public

    An API project done by Kotlin with Spring Boot that does CRUD operations with MongoDB

    Kotlin 1

  4. timesheet-api timesheet-api Public

    The App works by saving,listing and mostly calculating Timesheet registration

    Java 1 2

  5. design-patterns-studies design-patterns-studies Public

    Java project built to study design patterns

    Java 2

  6. engineering-templates engineering-templates Public

    A collection of reusable templates, configurations, and best-practice tooling for backend and platform engineering.

    Shell 2