Aleksey K.

Principal .NET engineer with 25+ years of experience building, modernizing, and supporting production software. My core areas are .NET backend systems, APIs and integrations, Windows desktop applications, and modernization of complex existing codebases. I work across C#, modern .NET / ASP.NET Core, REST APIs, SQL, WPF, WinForms, and legacy Microsoft technologies. My projects often involve systems that are already in production and need careful extension, performance improvements, integration, migration, or architectural cleanup without disrupting existing users. I have completed 120+ projects and 37,000+ hours on Upwork, including long-term work on financial software, business applications, data-processing systems, cloud migrations, desktop products, deployment tools, and enterprise integrations. For larger or broader projects, I also lead Neurodat, my software development agency. When additional frontend, backend, cloud, or AI expertise is required, I can involve the appropriate engineer while remaining involved in technical assessment, architecture, and delivery oversight. Typical projects I can help with: • .NET / ASP.NET Core backend development • REST APIs and third-party integrations • WPF and Windows desktop applications • legacy .NET modernization • desktop + web hybrid systems • cloud and data migrations • performance and reliability improvements • technical assessment and architecture If you have an existing system that needs a senior technical owner—or a larger project that requires a well-matched development team—I can help define the right approach and move it forward.