Explore the challenges and solutions in creating a revolutionary banking backend in this 52-minute conference talk from Devoxx. Dive into Revolut's journey of disrupting finance, led by co-founder and CTO Vlad Yatsenko. Learn about the obstacles faced when building a new banking system, the mistakes made along the way, and how Revolut scaled their solution to serve over 4 million users. Discover insights on various topics including the rise of FinTech, the purpose of banks, monitoring techniques, microservices architecture, currency complexity, money laundering prevention, and machine learning applications. Gain valuable knowledge on agile processes, problem-solving approaches, and managing technical debt in the fast-paced world of modern banking technology.