- Java (for Android) and Swift (for iOS)
- C# (Unity) and C++ in the game space
- Java (JavaFX) and C++ (Qt) in the desktop space
- Java, Python, C#, PHP, Ruby, Go, Erlang/Elixir in the server space
- C, Python, Java in the IoT space
- Python and R in the areas of data science and machine learning
No offence, but what is it that you think you know?