Redesigning Google: how Larry Page engineered a beautiful revolution | The Verge

Check the source for a detailed overview of Google's UX design process

"We went to Google looking for the person responsible for the new design direction, but the strange answer we got is that such a person doesn’t exist. Instead, thanks to a vision laid out by a small team of Google designers, each product team is finding its way to a consistent and forward-looking design language thanks to a surprising process.
They’re talking to each other."

Redesigning Google: how Larry Page engineered a beautiful revolution | The Verge