Hi William,
I am not much of coder. However, the Coding process is as critical as design; it brings to life the design vision.

From a design perspective — We use tools like Invision and Sketch, to send out well-defined assets along with style guides to our coding team. This style guide is a reliable reference point that brings context to every pixel and in turn precision.

I firmly believe that Design & Engineering are intertwined. They feed off one another, and this helps manifest a great product.

Will hopefully write more on style guides soon.

Regards
Dean