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Working from home
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Achievement: Pull SharkAchievement: Quickdraw

Achievements

Achievement: Pull SharkAchievement: Quickdraw

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Watashi00/README.md

👋 Hi, I’m Rodrigo (Watashi00)

I am a Back-end Engineer focused on C, Java, Spring Boot, and SQL/NoSQL, with a strong emphasis on system architecture, scalability, distributed systems, and performance.

I enjoy designing and building end-to-end systems, from low-level implementation details to high-level architectural decisions, always prioritizing maintainability and long-term evolution.

🧭 Professional Overview

  • Back-end–focused engineer with an architecture-first mindset
  • Experience designing APIs, services, gateways, and data-driven systems
  • Comfortable working across multiple languages, runtimes, and paradigms
  • Strong focus on performance, scalability, and system reliability
  • Pragmatic approach to software design and infrastructure decisions

🛠 Technologies & Tools

Programming Languages

Java C Rust Assembly JavaScript TypeScript

Frameworks & Runtimes

Spring Boot Bun Node.js React

Web Technologies

HTML5 CSS3

Databases & Storage

PostgreSQL MySQL H2 Apache Cassandra

Messaging, Caching & Async

Redis Apache Kafka RabbitMQ

Object Storage & CDN

Amazon S3 Cloudflare R2

  • S3-compatible object storage
  • Static assets and artifact storage
  • Versioned uploads and lifecycle policies
  • Backend integration for file handling and media delivery
  • Cost-aware storage strategies (egress-free with R2)

Cloud, Networking & Edge

Cloudflare

  • DNS & zone management
  • Reverse proxy and edge routing
  • SSL/TLS termination
  • CDN and caching strategies
  • Rate limiting and basic WAF concepts

Dev Tools & Infrastructure

Git GitHub Docker Kubernetes

🏗 Architecture & Back-end Design

  • Layered Architecture (Controller / Service / Repository)
  • Clean Code and SOLID principles
  • DTOs, validation, and mapping strategies
  • Centralized error handling and API contracts
  • API versioning and backward compatibility
  • Authentication & authorization (JWT, role-based access)
  • OpenAPI / Swagger documentation
  • Gateway and edge-aware system design
  • Object storage–backed architectures (S3/R2)

☁️ Cloud, DevOps & Infrastructure

  • Docker & Docker Compose
  • Environment-based configuration (dev / test / prod)
  • Linux-based development environments
  • CI/CD fundamentals using GitHub Actions
  • Cloud-native and edge-oriented application design

⚙️ Performance & Scalability

  • Application-level performance tuning
  • Memory and CPU awareness
  • Efficient data access and query design
  • Low-level programming concepts (C & Assembly)
  • Bottleneck identification and scalability planning
  • Distributed system trade-offs and constraints

🧪 Testing & Code Quality

  • Unit testing (JUnit, Mockito)
  • Integration testing for REST APIs
  • Testable and isolated business logic
  • Refactoring-oriented mindset
  • Focus on long-term maintainability

📫 Contact

💬 Fun Fact

Always exploring new technologies and paradigms, with a constant focus on how systems are designed, built, and scaled.

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