Open to opportunities

Yoel Castillo

@yoelcastillo

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Full Stack .NET engineer with 8+ years building enterprise web apps, REST APIs, and scalable solutions.

Honduras

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What I'm looking for

I’m looking to build and modernize enterprise web platforms—designing REST APIs, optimizing databases, and owning CI/CD with Azure, Docker, and cloud deployments. I value cross-team collaboration and production-impact work.

I’m a Full Stack Software Engineer focused on building enterprise web applications, REST APIs, and scalable business solutions with .NET technologies, React, and strong database foundations. I’ve spent 8+ years working on banking and workflow automation systems, including U.S.-based remote collaboration.

On the backend, I specialize in architecture and maintainability—designing and optimizing relational databases (SQL Server, MySQL, Oracle) and building robust APIs and backend services. I also modernize legacy applications into scalable web platforms, including migrations from Java to .NET-based solutions.

On the frontend, I deliver responsive integrations and user experiences using React and JavaScript-based technologies (including DevExtreme, Vue.js, Telerik, and Blazor). I’ve supported end-to-end delivery by collaborating closely with frontend teams and participating in QA testing and API documentation.

I bring a practical DevOps mindset to production outcomes, implementing CI/CD pipelines and deployment automation with Azure DevOps and Docker-based containerized environments. I’m energized by roles where I can troubleshoot production issues, optimize performance, and help teams continuously improve critical systems.

Experience

Work history, roles, and key accomplishments

Current

.NET Full Stack Developer

Current

SoftwareMind

Dec 2023 - Present (2 years 6 months)

Develop and maintain RESTful APIs and backend services using .NET, PHP/Laravel, and SQL technologies. Collaborate with React frontend teams, implement Azure DevOps CI/CD and Docker-based deployments, and troubleshoot production issues for business-critical enterprise apps.

.NET ASP.NET REST APIs React SQL Server MySQL Azure DevOps CI CD Docker Azure

Analyst Programmer

NGS

Oct 2018 - Dec 2023 (5 years 2 months)

Built and modernized enterprise banking and internal business platforms for CABEI using .NET MVC/.NET Core, C#, Entity Framework, React, and DevExtreme. Migrated legacy Java applications to .NET and delivered integrations with Oracle E-Business Suite, SharePoint, Azure B2C, Office 365, Active Directory, and Oracle on-prem/cloud systems.

MVC .NET Core C++Entity Framework React Oracle E Business Suite Office 365 Pl SQL Azure DevOps

Software Developer

Grupo Sinergia

Apr 2018 - Oct 2018 (6 months)

Developed HR and ERP web solutions using Java, Hibernate, Bootstrap, and SQL-based databases. Improved reporting and integrated ERP functionalities for enterprise clients, including work with VB.NET.

Java Hibernate Bootstrap SQL VB.NET ERP Integration Web Development Reporting

ERP & Payroll Developer

AlasRepuestos

Jan 2018 - Apr 2018 (3 months)

Improved ERP and payroll systems using C# WinForms and enhanced business workflows. Developed a vehicle intake web system using PHP and PostgreSQL.

WinForms ERP Systems Payroll Systems PHP PostgreSQL Web Development

SharePoint Workflow Developer

Tigo

Jan 2017 - Jul 2017 (6 months)

Maintained internal corporate platforms and built workflows in SharePoint using Nintex Forms. Developed an error tracking system for SharePoint workflows to support reliable workflow execution.

SharePoint Nintex Forms Workflow Automation Error Tracking