20 years of experience in Windows software development (API-level). Experience in multi-tier software development, Web applications, and Android, iOS, and macOS software development. Good knowledge of software development technologies for both Windows (ActiveX/OCX, services, shell extensions, etc.) and Web (ISAPI/CGI, ASP/JSP, Ajax, REST, web-services, etc.). Good knowledge of several programming languages for both desktops (Delphi/Object Pascal, C++, C#, VB, x86/x64 Assembler and more) and Web (PHP, Python, Ruby, Javascript, etc.).