Monzo founder Tom Blomfield talks at TechCrunch Disrupt Berlin 2017 at Arena Berlin on December 4, 2017.

Tom Blomfield, the founder of U.K. fintech Monzo, has said that being determined and resilient are fundamental to success. 

Blomfield, who stepped down as Monzo's CEO last year and then announced he was leaving the challenger bank altogether in January, was speaking on an episode of the Diary of a CEO podcast released Monday.