About me

Hello! Welcome to my portfolio. I am Leonardo Santana, 20 years old, and I work as a Full-Stack / Product Engineer. I build TypeScript products across React/Next.js frontends, NestJS/Node APIs, and PostgreSQL data layers, deploying them on Docker/Linux environments. My experience includes healthcare SaaS platforms, realtime financial systems with WebSocket-based quote delivery, automated trading engines, and AI-integrated workflow automation. I combine structured technical training with self-taught learning and hands-on delivery of commercial software.

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Full-Stack / Product Engineer

Leonardo Santana

About Me

I am Leonardo Santana, a Full-Stack / Product Engineer building TypeScript products across React/Next.js frontends, NestJS/Node APIs, PostgreSQL data layers and Docker/Linux deployments. My journey combines structured technical training from SENAI with self-taught learning and delivering real solutions in the corporate technology market.

Key Highlights: Systems Development Technician – SENAI (completed)
Secondary Certificates: Blockchain, Leadership, Financial Management
Building full-stack products: healthcare SaaS, realtime financial systems, automation
Focus on continuous learning, product thinking, and technical depth

My Journey

2022 - 2023

2024 - 2025

2026 - Present

Web Architecture & Relational Foundations

In 2022, I began my technical career path, entering the Systems Development program at SENAI in 2023. This foundational period focused on core web architectures, object-oriented programming, and relational persistence, delivering responsive UI systems and complete end-to-end CRUD applications.

2022 - 2023

SENAI Systems Development

Algorithmic logic, database modeling, and software engineering principles.

2023

Pine Sports

Complete e-commerce layout built with semantic HTML5 and pure CSS3 architecture.

2023

Skirt Streetwear

Functional e-commerce prototype with PHP backend, relational MySQL, and CRUD.

Reactive Systems & Production Infrastructure

Expanded into modern JavaScript frameworks (React) and cross-platform mobile development (React Native/Expo). Delivered Cat-Assist AI as my SENAI graduation capstone with real-time WebSocket messaging. In 2025, worked as Full Stack Developer at BX Consultoria, mastering Linux VPS deployments, Docker containerization, Nginx, PM2, NestJS, and Next.js.

2024

React & Mobile Ecosystem

React web apps, React Native / Expo (Ironber), and real-time Firebase sync.

2024

Cat-Assist AI (TCC SENAI)

Conversational support combining LLM APIs with real-time WebSocket messaging.

2025

BX Consultoria — Full Stack

Commercial infrastructure: Docker, Linux VPS, Nginx, PM2, Next.js, and NestJS.

High-Concurrency Product Engineering

In 2026, co-founded the startup Bop alongside engineering partner Gustavo, architecting two major commercial products: CPAE (a multi-tenant healthcare EHR platform) and BackOption (a real-time WebSocket financial terminal). Concurrently built ProfitX (an algorithmic trading engine in TypeScript) and joined a product team engineering frontend gamification for financial platforms.

2026