Open to opportunities

Leonardo Marques silva

@leonardomarquessilva

Message

Senior .NET developer with 10+ years building ASP.NET Core APIs and messaging systems in cloud environments.

Brazil

Message

What I'm looking for

Busco oportunidades para desenvolver soluções .NET modernas (ASP.NET Core, APIs e mensageria Kafka/RabbitMQ), liderar integrações e qualidade com CI/CD, e trabalhar com bancos Oracle/SQL Server/PostgreSQL e autenticação Azure AD em ambientes cloud.

I’m a .NET Developer with more than ten years of experience delivering projects with ASP.NET MVC (versions 4 and 5), ASP.NET WebForms, and Windows Forms (2 through 4.8) across the .NET Framework and .NET (5, 6, 7, 8, and 9). I work on ERPs, API integrations, and messaging queues, including Kafka and RabbitMQ, with deep hands-on knowledge of relational databases.

I’ve supported production environments with CI/CD using Azure DevOps, fixed code vulnerabilities using Veracode, and implemented authentication with Azure AD. Across my roles, I also contributed to architecture work (solutions, documentation, POCs, and libraries), built Azure Functions integrations, and delivered full-stack features—from banking Web API integrations to ERP migrations from COBOL to PostgreSQL and invoicing solutions using AngularJS and C# Web API.

Experience

Work history, roles, and key accomplishments

Current

Desenvolvedor de .NET sênior

Current

Stefanini Group

Mar 2026 - Present (4 months)

Projeto(s) que participei:

- Zurich
Atuo como desenvolvedor Fullstack .Net: Asp.Net Mvc, WebForms , .Net Core e WebAPI
Deploy CI/CD Azure devops
Manutenção e correção de incidentes em UAT/PROD
Experiência em Banco de dados Oracle e SQL Server.
Correção de vulnerabilidades de código no Veracode

Current

Desenvolvedor .NET sênior

Current

Stefanini Group

Mar 2026 - Present (4 months)

Fullstack .NET development using ASP.NET MVC, WebForms, .NET Core, and WebAPI. Worked on CI/CD with Azure DevOps, incident maintenance/corrections in UAT/PROD, Oracle/SQL Server database work, and code vulnerability corrections in Veracode.

ASP.NET MVC Web APIs .NET Core CI CD Azure DevOps Azure Oracle Microsoft SQL Server Veracode Incident Management UAT Production Support

Developer .Net Senior

GFT Technologies

Jun 2021 - Dec 2025 (4 years 6 months)

Projects I Have Worked On:

Credit Suisse / UBS
Worked in the architecture sector creating solutions, documentation, POCs, and libraries.
Performed integrations between APIs and feature implementations.
Authentications using Azure AD.
Implementations with Azure functions.
Prudential
Work on development and maintenance of routines in Oracle and PostgreSQL databases.
Participate in the documenta

WinForms .NET .NET Core ADO.NET Apache Kafka Microsoft SQL Server Oracle Azure AD GitHub Gitlab C#ASP.NET MVC API Integration Azure Active Directory Azure Functions PostgreSQL SQL Server REST APIs Authentication

Developer .Net Senior

Alterdata Software

Jul 2020 - Jun 2021 (11 months)

.NET C# Developer, working with ASP.NET MVC Framework 4.0 (Razor) using Visual Studio 2010 and 2013.
I have also worked with .NET Core (Web API) and participated in projects using WebForms and ASP.NET MVC (Razor).
Additionally, I worked on some Java-based bots, using Eclipse as the development environment.

ASP.NET Core REST APIs C#ASP.NET MVC ASP.NET Visual Studio Java Eclipse

Developer .Net Senior

Full Screen Tecnologia de Computação

Jan 2009 - Jul 2020 (11 years 6 months)

I worked primarily with .NET using VB.NET and C#, using Visual Studio 2008, 2012, 2015, 2017, and 2019.
I collaborated with the team on the migration of an ERP system from COBOL to PostgreSQL.
I worked on projects involving Electronic Invoicing (NF-e and NFC-e), all developed using .NET Framework.
I also worked on Service Invoice (NFS-e) projects in partnership with Tecnospeed, using AngularJS and