Is it possible to use Nordic SDK with Arduino?

Using the nrf52 DK, I was trying for hours to setup Segger IDE on a mac, and the software doesn't feel good to me, its not clear where is your code, it has too many libraries, it feels cumbersome, like Windows.

Then I tried using the Arduino IDE from here, and after 5 minutes (!) I was able to blink a led.

So the problem with it, is that you can't do more complex stuff such as writing to Flash, RTC, OTA etc. Is there a way to use explicit code from your SDK together with Arduino ?

If so, how you do it ? can I simply import a library from the SDK and call its methods ?

thanx.