Amina J.

Need a software engineer who can build a new application, extend an existing system, integrate APIs, fix difficult bugs, or work confidently inside a mature codebase? I’m a Full-Stack Software Engineer with 4 years of professional software engineering experience across enterprise backend, web, and Windows desktop applications. My strongest professional foundation is in C#, .NET, ASP.NET Core, ASP.NET Web API, SQL Server, Entity Framework / EF Core, ADO.NET, REST APIs, and WinForms, complemented by full-stack experience with React, Node.js, Express.js, Angular, Blazor WebAssembly, JavaScript, Python, Django, MongoDB, MySQL, Tailwind CSS, and Bootstrap. I can help with: ✓ Full-stack web application development ✓ ASP.NET Core / .NET backend development ✓ REST API development and third-party integrations ✓ React, Angular, Blazor, and JavaScript frontends ✓ Node.js / Express.js backend development ✓ C# / .NET / WinForms desktop applications ✓ SQL Server and database-driven functionality ✓ Entity Framework, EF Core, ADO.NET, and LINQ ✓ JWT authentication and role-based access control ✓ Existing application enhancements and new features ✓ Legacy .NET debugging, maintenance, and modernization ✓ Bug fixing and production issue investigation ✓ Business workflow and Excel/data-processing automation ✓ Responsive business websites ✓ Docker, GitHub Actions, CI/CD, and deployment support BACKEND, APIs & DATABASES Professionally, I develop and maintain RESTful APIs, backend business logic, validations, authentication, authorization, database entities, relationships, and data-access workflows. I have worked with both Entity Framework Code First and Database First environments, SQL Server, stored procedures, ADO.NET, LINQ, JWT, RBAC, WCF, and SOAP services. I also have hands-on backend/full-stack project experience with Node.js, Express.js, Python, Django REST Framework, MongoDB, MySQL, and SQLite. FULL-STACK & FRONTEND I build responsive applications and interfaces using React, Angular, Blazor WebAssembly, JavaScript, HTML5, CSS3, Tailwind CSS, and Bootstrap. My projects include dashboards, authentication, booking and scheduling workflows, search and filtering, reusable components, form validation, client-side routing, API integration, dynamic application state, and interactive maps. C# / .NET DESKTOP APPLICATIONS I have substantial experience with Windows business applications using C#, .NET Framework, WinForms, SQL Server, ADO.NET, Entity Framework, EPPlus, Excel processing, RDLC, and Crystal Reports. My desktop work includes production planning, inventory analysis, accounting-data conversion, reporting, document generation, validation workflows, data imports/exports, and legacy application enhancement. EXISTING & LEGACY CODEBASES You do not need to have a brand-new project to work with me. I’m comfortable joining established applications, understanding their architecture and business rules, tracing existing functionality, fixing legacy defects, extending APIs, adding features, resolving data inconsistencies, refactoring code, and modernizing older .NET functionality. My professional experience includes mature systems using .NET Framework, Silverlight, WCF, SOAP services, WinForms, existing SQL Server databases, and production codebases. I do not assume that rewriting everything is automatically the right solution. INTEGRATIONS My integration experience includes Firebase Admin SDK, MQTT/MQTTnet, WhatsApp Business API / Meta Graph API, SQL Server Reporting Services (SSRS), Google Places API, Google Maps, OpenStreetMap / Overpass API, SMTP, QR-code workflows, and EPPlus-based Excel processing. BUSINESS SOFTWARE EXPERIENCE I have contributed to systems covering customer support and ticketing, field service, fleet management, vehicle tracking, logistics, warehouse operations, production planning, inventory analysis, accounting, reporting, meeting-room management, employee access control, and IoT/HVAC automation. That experience means I am used to software where business rules, data consistency, reliability, and existing workflows matter. WEB & DELIVERY Beyond enterprise software, I have built full-stack applications, client-facing websites, responsive business websites, interactive map applications, and a Django/Docker proof of concept with GitHub Actions CI/CD and deployment. My approach is simple: understand the requirement first, preserve what already works, communicate clearly, and build the solution that fits the actual project. If you need help with .NET, React, Node.js, Angular, WinForms, APIs, databases, integrations, full-stack development, business software, or an existing application that needs reliable development support, send me your current stack and what you need built, fixed, or improved.