Would you let your banker see you in your pajamas?

Yolande Piazza, the chief executive of Citigroup's innovation unit, describes its unique method of gathering feedback about its apps from customers. Her Citi FinTech team watches while customers use the technology at home, sometimes in their pajamas.

Piazza also talks about how she wins over people inside the company who are resistant to change and how her unit blends cultures, with both traditional bankers and Silicon Valley types working together.

She has learned a few things about navigating the challenges of innovating inside a large company like Citi.

Piazza ranks as No. 4 on our Women to Watch list for 2017. Read about her vision for making Citi a "life partner" for its customers here.

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Bonnie McGeer

Bonnie McGeer is the executive editor of American Banker. She oversees its monthly magazine and chairs the Most Powerful Women in Banking and Finance program.