So here is the simple step by which you can reveal the developer options:

1. Open Settings screen
2. Scroll down to the bottom, once you are there tap on About Tablet or About Phone.
3. Find Build number at bottom of the screen again. By Tapping it 7 times, you can be able reveal Developer options.
4. Check Developer options available in the settings screen, just above the About Tablet/Phone option.

FYI, From 7 time tapping on build number, it will show you some messages like “you’re 4 taps away from being a developer.”, “You are now Developer”. If you keep tapping continue it will show you toast message “No need, you are already a Developer”