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.NET Software Engineer
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.NET Software Engineer

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leandrown/README.md

Leandro Vieira

Software Engineer | .NET & C# | Backend | APIs | Automation | AI-Assisted Development


English

I am a .NET developer focused on backend and automation. My experience includes C#, ASP.NET Core, SQL Server, PowerShell, and corporate system support, along with hands-on work in API integration, technical documentation, troubleshooting, and software evolution in real-world environments.

Throughout my career, I have worked across web development, UI/UX, research and development, data curation, and .NET backend engineering, which gives me a broad and practical view of how systems are built, maintained, and modernized. Among my recent deliveries, I highlight the adaptation of the PJ Onboarding system to the new alphanumeric CNPJ format, operational automation with PowerShell, and support for legacy system modernization.

Main technologies

  • C#
  • .NET / ASP.NET Core
  • SQL Server
  • PowerShell
  • REST APIs
  • Entity Framework
  • Swagger / OpenAPI
  • Windows Applications

Current focus

  • .NET backend development
  • APIs and system integration
  • Legacy application modernization
  • Automation and utilities with PowerShell and C#

Links


Português

Sou desenvolvedor .NET com foco em backend e automação. Tenho experiência com C#, ASP.NET Core, SQL Server, PowerShell e sustentação de sistemas corporativos, além de atuação prática com integração de APIs, documentação técnica, troubleshooting e evolução de software em ambientes reais.

Ao longo da minha trajetória, passei por desenvolvimento web, UI/UX, pesquisa e desenvolvimento, curadoria de dados e backend .NET, o que me deu uma visão ampla sobre como os sistemas são construídos, mantidos e modernizados. Entre as entregas recentes, destaco a adaptação do sistema de Onboarding PJ ao novo CNPJ Alfanumérico, automações operacionais com PowerShell e apoio à modernização de sistemas legados.

Tecnologias principais

  • C#
  • .NET / ASP.NET Core
  • SQL Server
  • PowerShell
  • REST APIs
  • Entity Framework
  • Swagger / OpenAPI

Foco atual

  • Backend .NET
  • APIs e integração de sistemas
  • Modernização de aplicações legadas
  • Automação e utilitários com PowerShell e C#

Links

Pinned Loading

  1. ExcelDataImporter ExcelDataImporter Public

    A REST API that receives Excel files, validates and saves the data in SQL Server, and exposes endpoints to query the imported records. Comes with PowerShell scripts for automation and backup.

    C# 1

  2. MandrillusLab/MandrillusOS MandrillusLab/MandrillusOS Public

    A bare-metal operating system written entirely in C#, built on top of the MOSA Project

    C# 1

  3. QuantumRNG QuantumRNG Public

    A lightweight Q# project showcasing true quantum‑generated randomness via Azure Quantum.

    Q# 1

  4. Bakery Bakery Public

    The Fouth Coffee Bakery's web site - An application with ASP.NET Core Razor Pages

    C# 1