Abbas K.

Web Developer & Desktop Developer | C#, .NET Core, Blazor, ASP.NET

Senior .NET Developer with 20+ years of experience building, fixing, modernizing, and extending business applications using C#, ASP.NET Core, Blazor, SQL Server, Web API, WinForms, WebForms, Telerik, DevExpress, and .NET Framework. I specialize in complex .NET business systems: solving production bugs, improving performance, optimizing SQL Server databases, modernizing legacy .NET applications, and adding reliable new features without breaking existing workflows. Available for small bug fixes, legacy system maintenance, SQL performance tasks, API integrations, and long-term .NET development. What I can help you with: 🔹 .NET Backend & Web Development * C# development, .NET development, ASP.NET Core, ASP.NET MVC, Web API, and REST API * Backend development, API integration, third-party integrations, and business application development * Entity Framework, EF Core, LINQ, ADO.NET, repositories, migrations, and data access layers * Authentication, authorization, role-based access, and secure business workflows 🔹 Blazor & Modern Web Applications * Blazor Server, Blazor WebAssembly, Blazor WASM, Blazor PWA, and Razor components * Business dashboards, admin panels, internal tools, reporting interfaces, and workflow systems * Telerik UI for Blazor, Telerik Reporting, TRDX reports, and custom reporting solutions 🔹 SQL Server & Database Performance * SQL Server development, database design, T-SQL, stored procedures, views, triggers, and functions * Query optimization, indexing, performance tuning, slow report troubleshooting, and database refactoring * Data migration, database cleanup, reporting databases, and business data structures 🔹 Legacy .NET Modernization * ASP.NET WebForms, ASPX applications, .NET Framework applications, WinForms, and WPF * Legacy application maintenance, bug fixing, refactoring, and safe modernization * Migration from older .NET Framework systems to modern .NET, ASP.NET Core, Blazor, or API-based architecture * DevExpress WinForms, Telerik components, desktop UI modernization, and reporting system upgrades 🔹 Automation, Integration & AI * OpenAI API, ChatGPT API, AI integration, chatbot features, and AI-powered business tools * Web scraping, Puppeteer automation, browser automation, API scraping, and data extraction * RabbitMQ, background services, Windows Services, scheduled jobs, CQRS, modular systems, and workflow automation I have hands-on experience with accounting software, sales systems, warehouse and inventory systems, treasury systems, CRM, ERP-style applications, healthcare systems, reporting platforms, admin panels, dashboards, and other database-driven business applications. Why clients work with me: ✅ 20+ years of practical software development experience ✅ Strong debugging and root-cause analysis skills ✅ Experience with both modern .NET and legacy .NET Framework systems ✅ Ability to understand large existing codebases and improve them safely ✅ Strong SQL Server, reporting, backend, and business application experience ✅ Clean, maintainable, stable, and performance-focused solutions ✅ Focus on reliability, long-term maintainability, and real business needs Typical projects I can support: * Build a new ASP.NET Core, Blazor, or Web API application * Fix bugs in an existing .NET, WebForms, WinForms, WPF, or SQL Server system * Modernize legacy .NET Framework applications * Improve SQL Server performance and slow reports * Add new modules to accounting, inventory, CRM, ERP, or internal business systems * Integrate third-party APIs, payment services, AI tools, or automation workflows * Maintain and extend long-running business applications safely Core technologies: Web Developer, Desktop Developer, Web App Developer, Desktop App Developer, C#, .NET, .NET Core, .NET Framework, ASP.NET Core, ASP.NET MVC, ASP.NET Web API, Web API, REST API, Blazor, Blazor Server, Blazor WebAssembly, Blazor WASM, PWA, WinForms, Windows Forms, WPF, WebForms, ASPX, Entity Framework, EF Core, ADO.NET, LINQ, SQL Server, T-SQL, Stored Procedures, SQL optimization, Telerik, Telerik UI for Blazor, Telerik Reporting, DevExpress, DevExpress WinForms, RabbitMQ, CQRS, Windows Services, background services, Puppeteer, browser automation, web scraping, API integration, OpenAI API, ChatGPT API, and AI integration. If you need a senior .NET developer, C# developer, ASP.NET Core developer, backend developer, Blazor developer, SQL Server developer, desktop application developer, Web API developer, Telerik developer, DevExpress developer, web scraping developer, or legacy application modernization specialist, I can help you build, fix, optimize, or modernize your application.