Video Description

QCon San Francisco, the international software conference, returns November 17-21, 2025. Join senior software practitioners from early adopter companies as they share real-world insights and actionable advice to help you adopt the right technologies and practices. Gain exposure to innovative approaches and fresh ideas in software development and engineering, designed to inspire and challenge you. Don’t miss this chance to deepen your knowledge, sharpen your skills, and stay ahead in the ever-evolving world of technology. Register now: https://bit.ly/3BYzfbe -------------------------------------------------------------------------------------------------------------------------------------- Download the slides at InfoQ: http://bit.ly/2EOmJYR Edward Wible and Rafael Ferreira discuss the key elements that make Nubank tick for millions of customers every day, including transaction authorization, messaging infrastructure (Kafka), real-time double-entry accounting (Datomic), customer and temporal sharding, their analytical environment and the role of predictive models, and some key security decisions they made along the way. This presentation was recorded at QCon San Francisco 2017.