Developed and delivered scalable solutions using C#, .NET Core and Framework, .NET MAUI, Blazor, Windows Forms, SQL, RESTful APIs, and gRPC.Planned, developed, and implemented new features and bug fixes for desktop and mobile point-of-sale systems, leveraging agile methodologies for continuous improvement and timely delivery.Enhanced legacy credit card processing integrations, significantly reducing support calls and improving overall system reliability.Integrated new credit card processing systems adhering to PCI compliance standards, improving transaction reliability and security, and enabling eCommerce and mobile platform compatibility.Rebuilt a legacy mobile point-of-sale application in just three months using .NET MAUI, enabling app store releases for the first time and delivering enhanced performance, expanded functionality, and improved user experience.Replaced and unified remote communication systems for mobile and eCommerce platforms using gRPC, improving efficiency, scalability, and reducing latency.Managed the end-to-end release of the mobile application to both the Apple App Store and Google Play Store, ensuring compliance with platform guidelines and smooth deployment.Developed and maintained Azure DevOps build and release pipelines for multiple applications and systems, ensuring efficient deployment and continuous integration processes.Built and integrated a RESTful API and Blazor Server website into the point-of-sale system, enabling seamless communication and improved functionality across platforms.