Gerald Quintana

I’m a Full-Stack Web Developer specializing in C# and .NET, with 10 years of experience building and maintaining web applications, REST APIs, and business systems.

I can help with:

* C# / .NET Core / ASP.NET MVC / Web API development
* Full-stack web application development
* SQL Server database design, queries, stored procedures, and optimization
* REST API development and third-party API integrations
* Entity Framework / EF Core
* JavaScript, jQuery, HTML, CSS, and Bootstrap
* System maintenance, debugging, and performance improvements
* AI and OpenAI API integrations
* Payment, authentication, and other business system integrations

I focus on writing clean, maintainable, and reliable solutions while understanding the business requirements behind the application.