I started programming in Basic, Pascal, Module II and C++ at the university. In my first job in 1991 I worked with Visual Basic I for prototyping and C++ for the solution. I worked with C and C++ for more than 10 years, then 20 years mostly in Java, and the last years Kotlin and Swift.Today I work with Spring Boot in Java and Kotlin using IntelliJ Idea 2022.3.2 for the back-end, and are currently; developing one mobile application with Jet Pack Composer for Android, working with Android Studio Electric Eel 2022.1.1, and lately, the same mobile application developed in SwiftUI for iOS, working with Xcode 14.2.