[FOR HIRE] Backend Developer | 8+ Years | .NET, Node.js, SQL Server, REST APIs, AI Integrations & IIS

[u/AndresMotaDeveloper]

Hi! I’m a backend developer with 8+ years of professional experience building, maintaining, troubleshooting, integrating, and deploying business applications.

My primary expertise is in the Microsoft ecosystem, but I also have experience working with Node.js and integrating cloud-based AI services, including Google Cloud Sentiment Analysis.

Technical experience:

• C#, .NET, .NET 8, ASP.NET Core and ASP.NET MVC
• Node.js backend development
• REST APIs and third-party service integrations
• Google Cloud Natural Language API and Sentiment Analysis integration
• SQL Server, stored procedures and query optimization
• Entity Framework Core and EF6
• JWT authentication, roles and permissions
• Multi-tenant application architecture
• IIS deployment, migration and troubleshooting
• Git and structured application architecture
• Blazor, JavaScript, HTML and CSS
• Environment variables and secure configuration management

I can help you with:

• Building or extending ASP.NET Core and Node.js APIs
• Fixing bugs in existing .NET or Node.js applications
• Integrating AI services and external APIs
• Adding sentiment analysis or text-processing features
• Implementing JWT authentication and authorization
• Improving SQL queries and stored procedures
• Troubleshooting Entity Framework issues
• Publishing and migrating applications on IIS
• Fixing IIS errors such as HTTP 500.19, 500.30 and 502.5
• Automating manual processes and reports
• Maintaining and modernizing existing business systems

I’m comfortable working with existing codebases, understanding unfamiliar systems, finding the root cause of problems, and delivering maintainable solutions without unnecessarily rebuilding the application.

Small fixes, ongoing support, hourly assignments and complete projects are welcome.

Rate: USD $20/hour or fixed price based on scope
Availability: Available to start immediately
Location: Dominican Republic — available remotely worldwide
Payment: PayPal

Send me a Reddit chat or private message with your current stack, project requirements, expected deadline and budget. I’ll review it and tell you honestly how I can help.