Also it's a two way street. When I'm implementing a UI, I try to understand the principles and ideas behind a design. Good tooling and some experience/knowledge

Also it's a two way street. When I'm implementing a UI, I try to understand the principles and ideas behind a design. Good tooling and some experience/knowledge helps, but ultimately it comes down to communication, asking questions and just having a discussion about a design. On the other side there is also a benefit of giving technical input about a design, sometimes there are more robust solutions from a technical standpoint that gel with what the designer does. I think both design and implementation are more efficient this way. It's also more fun.