Oscar P.

Senior .NET Engineer | API Integrations | Legacy Modernization | AI

Top-Rated Plus Freelancer | Senior .NET Engineer | API Integrations | Legacy Modernization | AI-Assisted Automation I am a Senior Software Engineer with over 20 years of professional experience helping companies modernize legacy systems, build reliable APIs, and integrate complex business platforms. I started my career working with Visual FoxPro and desktop-based enterprise applications, and later transitioned to the .NET ecosystem, where I have spent many years building scalable backend systems using C#, ASP.NET, and SQL Server. This background allows me to work comfortably with both legacy and modern technologies, acting as a bridge between old systems and new architectures. In recent years, I have also incorporated AI-assisted tools and platforms into my workflow to improve automation, data analysis, and development efficiency, including experience with Abacus.AI for AI-driven insights and process optimization. What I specialize in Legacy system modernization (Visual FoxPro, Delphi → .NET / ASP.NET Core) API development and system integrations (REST & SOAP) ERP and HR system integrations (Epicor, ADP, Workday, SAP) Database-driven applications (SQL Server, Oracle, MySQL) Automation and productivity solutions (AutoIT) AI-assisted automation and data analysis How AI adds value to my work AI-assisted development for faster debugging, refactoring, and optimization Using AI tools to improve reporting, data interpretation, and business insights Supporting automation workflows with AI-driven analysis Enhancing legacy systems with modern, intelligent components Recent work highlights Migrated legacy Visual FoxPro applications to C# and ASP.NET with SQL Server backends Integrated payroll and HR platforms (ADP, Workday) with custom ERP systems Designed and implemented RESTful APIs for multi-system environments Applied automation and AI-assisted tools to reduce manual processes Led small development teams on long-term enterprise projects Technical Skills Languages & Frameworks: C# (.NET, ASP.NET, ASP.NET Core, WinForms, WPF), Visual FoxPro, Delphi, Angular, AutoIT, Java Databases: SQL Server (T-SQL), Oracle (PL/SQL), MySQL APIs & Integrations: REST, SOAP, third-party and internal systems Reporting: SSRS, Crystal Reports ERP & Business Systems: Epicor, SAP, ADP, Workday AI & Automation: Abacus.AI, AI-assisted development, automation workflows Tools: SSIS, Inno Setup, InstallShield I am a reliable, detail-oriented professional who values clean code, clear communication, and long-term collaboration. If you need help modernizing a legacy system, integrating APIs, or enhancing your applications with automation and AI-assisted solutions, I’d be glad to work with you.