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smart-coder997/README.md

👋 Hi, I'm Leonan Nunes Costa

Senior Full Stack Developer | AI Feature Integrator | Cloud-Native Engineer

📍 Based in Capitao Poco, Brazil

💼 10+ years in building scalable web apps and cloud solutions
🧠 Passionate about AI integration, clean architecture, and DevOps

🚀 Tech Stack

Languages
TypeScript JavaScript Python Ruby C# SQL

Frontend
React Angular Blazor HTML5 .NET MAUI

Cloud & DevOps
AWS Azure Azure DevOps Docker Kubernetes

AI & Tools
OpenAI LangChain Postman

Databases
SQL Server PostgreSQL MongoDB

🧩 Work Domain

I specialize in designing and developing end-to-end web and mobile applications with a strong focus on performance, scalability, and modern DevOps practices. My work spans across:

  • 🌐 Web Application Development – Full stack solutions using Python, Node.js, Ruby on rails, .NET, React, and Angular
  • ☁️ Cloud-Native Systems – Building scalable apps on Microsoft Azure and AWS with CI/CD automation
  • 📱 Cross-Platform Mobile – Developing apps using .NET MAUI, React Native and responsive frontends
  • 🤖 AI Feature Integration – Embedding OpenAI, LangChain, and RAG pipelines into real-world applications
  • 🛠️ Enterprise System Architecture – Microservices, serverless design, event-driven patterns
  • 🧪 Test Automation & DevOps – Azure DevOps, GitHub Actions, containerization, and infrastructure automation
  • 🗃️ Data Management – SQL Server, PostgreSQL, NoSQL, and secure API-driven data exchange
  • 🚚 Domain Expertise – Logistics, retail tech, healthcare, and B2B SaaS platforms

“Code is design. Architecture is intent. Build with clarity.”

Pinned Loading

  1. AI_Image_Generator AI_Image_Generator Public

    TypeScript 2

  2. ChatSoc ChatSoc Public

    Python 1

  3. django-chatgpt-chatbot django-chatgpt-chatbot Public

    💬 Chatbot made using Django web framework with OpenAI's GPT-3.5 language model

    Python 1

  4. django-erp django-erp Public

    Python Enterprise Resource Planner (ERP) software prototype.

    Python

  5. virtual-voice-assistant virtual-voice-assistant Public

    Python 1

  6. RealtimeVoiceChat RealtimeVoiceChat Public

    Voice-based search and Q&A app for healthcare, aimed at delivering accurate, culturally relevant health info in India with strong safety and ethical standards.

    Python 2