👋 Hello, I'm Natan Felipe de Oliveira

I'm a Full Stack Engineer focused on React.js and Node.js, building scalable web applications, robust APIs, and data-driven systems.

I work across the entire stack — from frontend interfaces and user experience to backend architecture, integrations, and cloud deployment.

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💼 Professional Summary

• 💻 Full Stack Developer since 2020, with strong focus on React (frontend) and Node.js (backend)
• ⚛️ Experience building modern, responsive interfaces using React, component-driven architecture, and clean UI patterns
• 🔧 Strong backend expertise with Node.js (TypeScript) for building scalable APIs and services
• 🗄️ Solid experience with databases and data modeling, including high-volume processing and performance optimization
• 🔗 Experience with system integrations and APIs, especially in enterprise and financial contexts
• ☁️ Hands-on with cloud (AWS & OCI) and Dockerized applications
• 🔐 Background in secure application development, covering authentication, validation, and data protection

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⚛️ Frontend (React)

• React.js — component-based architecture, hooks, state management
• TypeScript — type-safe frontend applications
• Modern UI development — reusable components, clean layouts
• SPA development and API integration
• Experience with Vite, responsive design, and UI libraries

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🔧 Backend (Node.js)

• Node.js (TypeScript) — REST APIs, services, async processing
• Express.js — API design and routing
• Clean Architecture & SOLID principles
• Controllers, Services, Repositories, DTOs
• Background with Java + Spring Boot for enterprise systems

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🗄️ Databases & Data

• PostgreSQL / MySQL — relational modeling, indexing, performance
• MongoDB — document-based modeling
• Oracle PL/SQL — advanced queries, procedures, high-volume processing
• ORMs: Prisma, Sequelize, JPA/Hibernate
• Data pipelines, ETL, and batch processing

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🔗 Integrations & APIs

• REST API design and consumption
• External APIs (payments, financial systems, etc.)
• Enterprise integrations (ERP, legacy systems)
• Data transformation and normalization

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🔐 Security & Best Practices

• Authentication & Authorization (JWT, RBAC)
• Input validation and sanitization
• Secure API design
• Audit logs and traceability

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⚙️ Infrastructure & DevOps

• Dockerized applications
• CI/CD pipelines
• Cloud: AWS & OCI
• Environment configuration & secrets management

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🧠 What I Build

I focus on building systems that combine:

• ⚛️ Modern frontend (React) with great user experience
• 🔧 Scalable backend APIs (Node.js)
• 🗄️ Efficient data handling and modeling
• 🔗 Reliable integrations with external systems
• ☁️ Production-ready cloud architecture

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🤝 Let's Connect