How does one make something universally useful? In a way that both respects how people have used something in the past, and anticipates new behaviors?
If you are the front end engineering team for Gmail, you find compelling statistical data, but still observe real people in order to deeply understand how your ideas actually work. You make big code changes for minimal visual interruption. And you discover that the effort to implement the new while keeping the old leads to a single, stronger solution for everyone. What goes into engineering the best webmail experience?
Read the complete article here https://careers.google.com/stories/how-maria-and-her-team-revolutionized-gmail-for-425-million-users/