About me

Hello! Welcome to my portfolio. I am Leonardo Cardoso Ferreira de Santana, 19 years old, and I am a Full Stack Developer. My focus is on designing and implementing robust web systems, scalable APIs, and efficient integrations across both backend and frontend. I have solid practical experience in building microservices with NestJS/Node.js, relational database management using PostgreSQL/Prisma, real-time applications via WebSockets, and cross-platform mobile development with React Native/Expo. I am proficient in containerized environments with Docker, VPS Linux deployment, and automated workflows, balancing clean visual UI/UX with technical excellence in code.

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Full Stack Developer

Leonardo Cardoso Ferreira de Santana

My Journey

2022 - 2023

2024

2025

2026 - Present

Beginning at SENAI

In 2022, I began my technical academic journey, entering the Systems Development program at SENAI in 2023. This was the starting point for mastering Web technologies, culminating in the delivery of the Pine Sports project, a responsive interface structured in pure HTML and CSS. In the second semester, I turned my focus toward backend engineering with PHP and MySQL relational databases, developing Skirt Streetwear, a functional e-commerce prototype integrated with relational persistence and complete CRUD flows.

React Native and AI

In late 2023 and early 2024, I expanded my tech ecosystem with my first JavaScript frameworks, focusing on React and real-time persistence with Firebase. Simultaneously, I entered cross-platform mobile development with React Native. The year's major milestone was the design of the Cat-Assist project, an intelligent conversational assistant integrated with LLMs (OpenAI/Gemini APIs) via WebSockets. I concluded the year graduating from both technical school and high school.

Automations & First Job

In the first half of 2025, I focused on automation and process orchestration using n8n. In the second half, I worked professionally as a Full Stack Developer at BX Consultoria. There I gained solid infrastructure experience by containerizing and deploying commercial software using Docker, Linux VPS servers, Nginx, and PM2, while developing systems with Next.js, NestJS, and CodeIgniter. At the end of the year, I also began exploring game development in Godot.

Startup Bop & Consolidation

In 2026, I co-founded the startup Bop in partnership with Gustavo, a Software Engineer and Master's candidate at USP. Under Bop, we structured our first corporate software projects, delivering two high-performance applications and launching the development of a third system. Simultaneously, I continue to specialize in modern SaaS architectures and secure database persistence.